Science.gov

Sample records for 400d cluster catalog

  1. The Extended Virgo Cluster Catalog

    NASA Astrophysics Data System (ADS)

    Rey, Soo-Chang

    2015-08-01

    We present a new catalog of galaxies in the wider region of the Virgo cluster, based on the Sloan Digital Sky Survey (SDSS) Data Release 7. The Extended Virgo Cluster Catalog (EVCC) covers an area of 725 deg2 or 60.1 Mpc2. It is 5.2 times larger than the footprint of the classical Virgo Cluster Catalog (VCC) and reaches out to 3.5 times the virial radius of the Virgo cluster. We selected 1324 spectroscopically targeted galaxies with radial velocities less than 3000 km s-1. In addition, 265 galaxies that have been overlooked in the SDSS spectroscopic survey but have available redshifts in the NASA Extragalactic Database are also included. Our selection process secured a total of 1589 galaxies, 676 of which are not included in the VCC. The certain and possible cluster members are defined by means of redshift comparison with a cluster infall model. We employed two independent and complementary galaxy classification schemes: the traditional morphological classification based on the visual inspection of optical images and a characterization of galaxies from their spectroscopic features. SDSS u, g, r, i, and z passband photometry of all EVCC galaxies was performed using Source Extractor. We compare the EVCC galaxies with the VCC in terms of morphology, spatial distribution, and luminosity function. The EVCC defines a comprehensive galaxy sample covering a wider range in galaxy density that is significantly different from the inner region of the Virgo cluster. It will be the foundation for forthcoming galaxy evolution studies in the extended Virgo cluster region, complementing ongoing and planned Virgo cluster surveys at various wavelengths.

  2. The Extended Virgo Cluster Catalog

    NASA Astrophysics Data System (ADS)

    Kim, Suk; Rey, Soo-Chang; Jerjen, Helmut; Lisker, Thorsten; Sung, Eon-Chang; Lee, Youngdae; Chung, Jiwon; Pak, Mina; Yi, Wonhyeong; Lee, Woong

    2014-12-01

    We present a new catalog of galaxies in the wider region of the Virgo cluster, based on the Sloan Digital Sky Survey (SDSS) Data Release 7. The Extended Virgo Cluster Catalog (EVCC) covers an area of 725 deg2 or 60.1 Mpc2. It is 5.2 times larger than the footprint of the classical Virgo Cluster Catalog (VCC) and reaches out to 3.5 times the virial radius of the Virgo cluster. We selected 1324 spectroscopically targeted galaxies with radial velocities less than 3000 km s-1. In addition, 265 galaxies that have been overlooked in the SDSS spectroscopic survey but have available redshifts in the NASA Extragalactic Database are also included. Our selection process secured a total of 1589 galaxies, 676 of which are not included in the VCC. The certain and possible cluster members are defined by means of redshift comparison with a cluster infall model. We employed two independent and complementary galaxy classification schemes: the traditional morphological classification based on the visual inspection of optical images and a characterization of galaxies from their spectroscopic features. SDSS u, g, r, i, and z passband photometry of all EVCC galaxies was performed using Source Extractor. We compare the EVCC galaxies with the VCC in terms of morphology, spatial distribution, and luminosity function. The EVCC defines a comprehensive galaxy sample covering a wider range in galaxy density that is significantly different from the inner region of the Virgo cluster. It will be the foundation for forthcoming galaxy evolution studies in the extended Virgo cluster region, complementing ongoing and planned Virgo cluster surveys at various wavelengths.

  3. THE EXTENDED VIRGO CLUSTER CATALOG

    SciTech Connect

    Kim, Suk; Rey, Soo-Chang; Lee, Youngdae; Chung, Jiwon; Pak, Mina; Yi, Wonhyeong; Lee, Woong; Jerjen, Helmut; Lisker, Thorsten; Sung, Eon-Chang

    2015-01-01

    We present a new catalog of galaxies in the wider region of the Virgo cluster, based on the Sloan Digital Sky Survey (SDSS) Data Release 7. The Extended Virgo Cluster Catalog (EVCC) covers an area of 725 deg{sup 2} or 60.1 Mpc{sup 2}. It is 5.2 times larger than the footprint of the classical Virgo Cluster Catalog (VCC) and reaches out to 3.5 times the virial radius of the Virgo cluster. We selected 1324 spectroscopically targeted galaxies with radial velocities less than 3000 km s{sup –1}. In addition, 265 galaxies that have been overlooked in the SDSS spectroscopic survey but have available redshifts in the NASA Extragalactic Database are also included. Our selection process secured a total of 1589 galaxies, 676 of which are not included in the VCC. The certain and possible cluster members are defined by means of redshift comparison with a cluster infall model. We employed two independent and complementary galaxy classification schemes: the traditional morphological classification based on the visual inspection of optical images and a characterization of galaxies from their spectroscopic features. SDSS u, g, r, i, and z passband photometry of all EVCC galaxies was performed using Source Extractor. We compare the EVCC galaxies with the VCC in terms of morphology, spatial distribution, and luminosity function. The EVCC defines a comprehensive galaxy sample covering a wider range in galaxy density that is significantly different from the inner region of the Virgo cluster. It will be the foundation for forthcoming galaxy evolution studies in the extended Virgo cluster region, complementing ongoing and planned Virgo cluster surveys at various wavelengths.

  4. PHAT Stellar Cluster Survey. II. Andromeda Project Cluster Catalog

    NASA Astrophysics Data System (ADS)

    Johnson, L. Clifton; Seth, Anil C.; Dalcanton, Julianne J.; Wallace, Matthew L.; Simpson, Robert J.; Lintott, Chris J.; Kapadia, Amit; Skillman, Evan D.; Caldwell, Nelson; Fouesneau, Morgan; Weisz, Daniel R.; Williams, Benjamin F.; Beerman, Lori C.; Gouliermis, Dimitrios A.; Sarajedini, Ata

    2015-04-01

    We construct a stellar cluster catalog for the Panchromatic Hubble Andromeda Treasury (PHAT) survey using image classifications collected from the Andromeda Project citizen science website. We identify 2753 clusters and 2270 background galaxies within ˜0.5 deg2 of PHAT imaging searched, or ˜400 kpc2 in deprojected area at the distance of the Andromeda Galaxy (M31). These identifications result from 1.82 million classifications of ˜20,000 individual images (totaling ˜7 gigapixels) by tens of thousands of volunteers. We show that our crowd-sourced approach, which collects >80 classifications per image, provides a robust, repeatable method of cluster identification. The high spatial resolution Hubble Space Telescope images resolve individual stars in each cluster and are instrumental in the factor of ˜6 increase in the number of clusters known within the survey footprint. We measure integrated photometry in six filter passbands, ranging from the near-UV to the near-IR. PHAT clusters span a range of ˜8 magnitudes in F475W (g-band) luminosity, equivalent to ˜4 decades in cluster mass. We perform catalog completeness analysis using >3000 synthetic cluster simulations to determine robust detection limits and demonstrate that the catalog is 50% complete down to ˜500 {{M}⊙ } for ages <100 Myr. We include catalogs of clusters, background galaxies, remaining unselected candidates, and synthetic cluster simulations, making all information publicly available to the community. The catalog published here serves as the definitive base data product for PHAT cluster science, providing a census of star clusters in an {{L}\\star } spiral galaxy with unmatched sensitivity and quality.

  5. VizieR Online Data Catalog: Annotations to the second Planck cluster catalog (Khatri, 2016)

    NASA Astrophysics Data System (ADS)

    Khatri, R.

    2016-05-01

    We have added additional columns to the second Planck cluster catalog which quantify the quality of clusters and try to discriminate the molecular cloud contamination in the catalog. We provide the {chi}2 for the fits of a parametric model with either Sunyaev-Zeldovich spectrum or CO-line emission spectrum to the Planck data within 5-arcmin at the position of each cluster. The difference in the {chi}2 value can be used to determine whether a candidate is likely to be a cluster or a molecular cloud and is indicative of the quality of the cluster candidate. (1 data file).

  6. Classification Clustering, Probabilistic Information Retrieval, and the Online Catalog.

    ERIC Educational Resources Information Center

    Larson, Ray R.

    1991-01-01

    Discusses problems with subject searches in online library catalogs and examines theoretical principles for the design of effective information retrieval systems. Probabilistic ranking methods are discussed, and an experimental online catalog called CHESHIRE is described. It is noted that CHESHIRE uses classification clustering, provides natural…

  7. Catalog of open clusters and associated interstellar matter

    NASA Technical Reports Server (NTRS)

    Leisawitz, David

    1988-01-01

    The Catalog of Open Clusters and Associated Interstellar Matter summarizes observations of 128 open clusters and their associated ionized, atomic, and molecular iinterstellar matter. Cluster sizes, distances, radial velocities, ages, and masses, and the radial velocities and masses of associated interstellar medium components, are given. The database contains information from approximately 400 references published in the scientific literature before 1988.

  8. Automated surface photometry for the Coma Cluster galaxies: The catalog

    NASA Technical Reports Server (NTRS)

    Doi, M.; Fukugita, M.; Okamura, S.; Tarusawa, K.

    1995-01-01

    A homogeneous photometry catalog is presented for 450 galaxies with B(sub 25.5) less than or equal to 16 mag located in the 9.8 deg x 9.8 deg region centered on the Coma Cluster. The catalog is based on photographic photometry using an automated surface photometry software for data reduction applied to B-band Schmidt plates. The catalog provides accurate positions, isophotal and total magnitudes, major and minor axes, and a few other photometric parameters including rudimentary morphology (early of late type).

  9. A GMBCG galaxy cluster catalog of 55,880 rich clusters from SDSS DR7

    SciTech Connect

    Hao, Jiangang; McKay, Timothy A.; Koester, Benjamin P.; Rykoff, Eli S.; Rozo, Eduardo; Annis, James; Wechsler, Risa H.; Evrard, August; Siegel, Seth R.; Becker, Matthew; Busha, Michael; /Fermilab /Michigan U. /Chicago U., Astron. Astrophys. Ctr. /UC, Santa Barbara /KICP, Chicago /KIPAC, Menlo Park /SLAC /Caltech /Brookhaven

    2010-08-01

    We present a large catalog of optically selected galaxy clusters from the application of a new Gaussian Mixture Brightest Cluster Galaxy (GMBCG) algorithm to SDSS Data Release 7 data. The algorithm detects clusters by identifying the red sequence plus Brightest Cluster Galaxy (BCG) feature, which is unique for galaxy clusters and does not exist among field galaxies. Red sequence clustering in color space is detected using an Error Corrected Gaussian Mixture Model. We run GMBCG on 8240 square degrees of photometric data from SDSS DR7 to assemble the largest ever optical galaxy cluster catalog, consisting of over 55,000 rich clusters across the redshift range from 0.1 < z < 0.55. We present Monte Carlo tests of completeness and purity and perform cross-matching with X-ray clusters and with the maxBCG sample at low redshift. These tests indicate high completeness and purity across the full redshift range for clusters with 15 or more members.

  10. A GMBCG Galaxy Cluster Catalog of 55,424 Rich Clusters from SDSS DR7

    SciTech Connect

    Hao, Jiangang; McKay, Timothy A.; Koester, Benjamin P.; Rykoff, Eli S.; Rozo, Eduardo; Annis, James; Wechsler, Risa H.; Evrard, August; Siegel, Seth R.; Becker, Matthew; Busha, Michael; Gerdes, David; Johnston, David E.; Sheldon, Erin; /Brookhaven

    2011-08-22

    We present a large catalog of optically selected galaxy clusters from the application of a new Gaussian Mixture Brightest Cluster Galaxy (GMBCG) algorithm to SDSS Data Release 7 data. The algorithm detects clusters by identifying the red sequence plus Brightest Cluster Galaxy (BCG) feature, which is unique for galaxy clusters and does not exist among field galaxies. Red sequence clustering in color space is detected using an Error Corrected Gaussian Mixture Model. We run GMBCG on 8240 square degrees of photometric data from SDSS DR7 to assemble the largest ever optical galaxy cluster catalog, consisting of over 55,000 rich clusters across the redshift range from 0.1 < z < 0.55. We present Monte Carlo tests of completeness and purity and perform cross-matching with X-ray clusters and with the maxBCG sample at low redshift. These tests indicate high completeness and purity across the full redshift range for clusters with 15 or more members.

  11. Optically-Selected Cluster Catalogs As a Precision Cosmology Tool

    SciTech Connect

    Rozo, Eduardo; Wechsler, Risa H.; Koester, Benjamin P.; Evrard, August E.; McKay, Timothy A.; /Michigan U.

    2007-03-26

    We introduce a framework for describing the halo selection function of optical cluster finders. We treat the problem as being separable into a term that describes the intrinsic galaxy content of a halo (the Halo Occupation Distribution, or HOD) and a term that captures the effects of projection and selection by the particular cluster finding algorithm. Using mock galaxy catalogs tuned to reproduce the luminosity dependent correlation function and the empirical color-density relation measured in the SDSS, we characterize the maxBCG algorithm applied by Koester et al. to the SDSS galaxy catalog. We define and calibrate measures of completeness and purity for this algorithm, and demonstrate successful recovery of the underlying cosmology and HOD when applied to the mock catalogs. We identify principal components--combinations of cosmology and HOD parameters--that are recovered by survey counts as a function of richness, and demonstrate that percent-level accuracies are possible in the first two components, if the selection function can be understood to {approx} 15% accuracy.

  12. Generating a Magellanic star cluster catalog with ASteCA

    NASA Astrophysics Data System (ADS)

    Perren, G. I.; Piatti, A. E.; Vázquez, R. A.

    2016-08-01

    An increasing number of software tools have been employed in the recent years for the automated or semi-automated processing of astronomical data. The main advantages of using these tools over a standard by-eye analysis include: speed (particularly for large databases), homogeneity, reproducibility, and precision. At the same time, they enable a statistically correct study of the uncertainties associated with the analysis, in contrast with manually set errors, or the still widespread practice of simply not assigning errors. We present a catalog comprising 210 star clusters located in the Large and Small Magellanic Clouds, observed with Washington photometry. Their fundamental parameters were estimated through an homogeneous, automatized and completely unassisted process, via the Automated Stellar Cluster Analysis package ( ASteCA). Our results are compared with two types of studies on these clusters: one where the photometry is the same, and another where the photometric system is different than that employed by ASteCA.

  13. Cosmological Constraints from the SDSS maxBCG Cluster Catalog

    SciTech Connect

    Rozo, Eduardo; Wechsler, Risa H.; Rykoff, Eli S.; Annis, James T.; Becker, Matthew R.; Evrard, August E.; Frieman, Joshua A.; Hansen, Sarah M.; Hao, Jia; Johnston, David E.; Koester, Benjamin P.; McKay, Timothy A.; Sheldon, Erin S.; Weinberg, David H.; /CCAPP /Ohio State U.

    2009-08-03

    We use the abundance and weak lensing mass measurements of the SDSS maxBCG cluster catalog to simultaneously constrain cosmology and the richness-mass relation of the clusters. Assuming a flat {Lambda}CDM cosmology, we find {sigma}{sub 8}({Omega}{sub m}/0.25){sup 0.41} = 0.832 {+-} 0.033 after marginalization over all systematics. In common with previous studies, our error budget is dominated by systematic uncertainties, the primary two being the absolute mass scale of the weak lensing masses of the maxBCG clusters, and uncertainty in the scatter of the richness-mass relation. Our constraints are fully consistent with the WMAP five-year data, and in a joint analysis we find {sigma}{sub 8} = 0.807 {+-} 0.020 and {Omega}{sub m} = 0.265 {+-} 0.016, an improvement of nearly a factor of two relative to WMAP5 alone. Our results are also in excellent agreement with and comparable in precision to the latest cosmological constraints from X-ray cluster abundances. The remarkable consistency among these results demonstrates that cluster abundance constraints are not only tight but also robust, and highlight the power of optically-selected cluster samples to produce precision constraints on cosmological parameters.

  14. A GMBCG GALAXY CLUSTER CATALOG OF 55,424 RICH CLUSTERS FROM SDSS DR7

    SciTech Connect

    Hao Jiangang; Annis, James; Johnston, David E.; McKay, Timothy A.; Evrard, August; Siegel, Seth R.; Gerdes, David; Koester, Benjamin P.; Rykoff, Eli S.; Rozo, Eduardo; Wechsler, Risa H.; Busha, Michael; Becker, Matthew; Sheldon, Erin

    2010-12-15

    We present a large catalog of optically selected galaxy clusters from the application of a new Gaussian Mixture Brightest Cluster Galaxy (GMBCG) algorithm to SDSS Data Release 7 data. The algorithm detects clusters by identifying the red-sequence plus brightest cluster galaxy (BCG) feature, which is unique for galaxy clusters and does not exist among field galaxies. Red-sequence clustering in color space is detected using an Error Corrected Gaussian Mixture Model. We run GMBCG on 8240 deg{sup 2} of photometric data from SDSS DR7 to assemble the largest ever optical galaxy cluster catalog, consisting of over 55,000 rich clusters across the redshift range from 0.1 < z < 0.55. We present Monte Carlo tests of completeness and purity and perform cross-matching with X-ray clusters and with the maxBCG sample at low redshift. These tests indicate high completeness and purity across the full redshift range for clusters with 15 or more members.

  15. Machine learning etudes in astrophysics: selection functions for mock cluster catalogs

    SciTech Connect

    Hajian, Amir; Alvarez, Marcelo A.; Bond, J. Richard E-mail: malvarez@cita.utoronto.ca

    2015-01-01

    Making mock simulated catalogs is an important component of astrophysical data analysis. Selection criteria for observed astronomical objects are often too complicated to be derived from first principles. However the existence of an observed group of objects is a well-suited problem for machine learning classification. In this paper we use one-class classifiers to learn the properties of an observed catalog of clusters of galaxies from ROSAT and to pick clusters from mock simulations that resemble the observed ROSAT catalog. We show how this method can be used to study the cross-correlations of thermal Sunya'ev-Zeldovich signals with number density maps of X-ray selected cluster catalogs. The method reduces the bias due to hand-tuning the selection function and is readily scalable to large catalogs with a high-dimensional space of astrophysical features.

  16. Extending the Dewey Decimal Classification via Keyword Clustering: The Science Library Catalog Project.

    ERIC Educational Resources Information Center

    Rosenberg, Jason B.; Borgman, Christine L.

    1992-01-01

    Discusses the Science Library Catalog, an online catalog intended for use by children at the Los Angeles Public Library, and describes the process of reorganizing the MARC-based database by using clustering algorithms to extend the Dewey Decimal Classification. Examples of screen displays are included. (18 references) (LRW)

  17. AN UPDATED CATALOG OF M33 CLUSTERS AND CANDIDATES: UBVRI PHOTOMETRY AND SOME STATISTICAL RESULTS

    SciTech Connect

    Ma Jun

    2012-08-15

    We present UBVRI photometry for 392 star clusters and candidates in the field of M33, which are selected from the most recent star cluster catalog. In this catalog, the authors listed star clusters' parameters such as cluster positions, magnitudes, colors in the UBVRIJHK{sub s} filters, and so on. However, a large fraction of objects in this catalog do not have previously published photometry. Photometry is performed using archival images from the Local Group Galaxies Survey, which covers 0.8 deg{sup 2} along the major axis of M33. Detailed comparisons show that, in general, our photometry is consistent with previous measurements. Positions (right ascension and declination) for some clusters are corrected here. Combined with previous literature, ours constitute a large sample of M33 star clusters. Based on this cluster sample, we present some statistical results: none of the youngest M33 clusters ({approx}10{sup 7} yr) have masses approaching 10{sup 5} M{sub Sun} ; roughly half the star clusters are consistent with the 10{sup 4}-10{sup 5} M{sub Sun} mass models; the continuous distribution of star clusters along the model line indicates that M33 star clusters have been formed continuously from the epoch of the first star cluster formation until recent times; and there are {approx}50 star clusters which are overlapped with the Galactic globular clusters on the color-color diagram, and these clusters are old globular cluster candidates in M33.

  18. PHAT STELLAR CLUSTER SURVEY. I. YEAR 1 CATALOG AND INTEGRATED PHOTOMETRY

    SciTech Connect

    Johnson, L. Clifton; Dalcanton, Julianne J.; Fouesneau, Morgan; Hodge, Paul W.; Weisz, Daniel R.; Williams, Benjamin F.; Beerman, Lori C.; Seth, Anil C.; Caldwell, Nelson; Gouliermis, Dimitrios A.; Larsen, Soren S.; Olsen, Knut A. G.; San Roman, Izaskun; Sarajedini, Ata; Bianchi, Luciana; Dolphin, Andrew E.; Girardi, Leo; Guhathakurta, Puragra; Lang, Dustin; and others

    2012-06-20

    The Panchromatic Hubble Andromeda Treasury (PHAT) survey is an ongoing Hubble Space Telescope (HST) multi-cycle program to obtain high spatial resolution imaging of one-third of the M31 disk at ultraviolet through near-infrared wavelengths. In this paper, we present the first installment of the PHAT stellar cluster catalog. When completed, the PHAT cluster catalog will be among the largest and most comprehensive surveys of resolved star clusters in any galaxy. The exquisite spatial resolution achieved with HST has allowed us to identify hundreds of new clusters that were previously inaccessible with existing ground-based surveys. We identify 601 clusters in the Year 1 sample, representing more than a factor of four increase over previous catalogs within the current survey area (390 arcmin{sup 2}). This work presents results derived from the first {approx}25% of the survey data; we estimate that the final sample will include {approx}2500 clusters. For the Year 1 objects, we present a catalog with positions, radii, and six-band integrated photometry. Along with a general characterization of the cluster luminosities and colors, we discuss the cluster luminosity function, the cluster size distributions, and highlight a number of individually interesting clusters found in the Year 1 search.

  19. A Photometrically Selected Galaxy Cluster Catalog from the SDSS DR4

    NASA Astrophysics Data System (ADS)

    Koester, B. P.; McKay, T. A.; Evrard, A. E.; Becker, M.; Bleem, L.; Annis, J.; Wechsler, R. H.; Sheldon, E. S.; Johnston, D.; Scranton, R.; Miller, C. J.; Nichol, R. C.

    2005-12-01

    We present an overview of a new BCG/red-sequence galaxy cluster catalog drawn from the Data Release 4 sample of Sloan Digital Sky Survey imaging. Galaxy clusters are selected by calculating the likelihood that each observed galaxy is a brightest cluster galaxy based on its color and magnitude, along with the degree to which galaxies cluster around it in color, magnitude, and space. This method provides a list of cluster locations together with estimates of their total galaxy content and accurate photometric redshifts (σ z < 0.02). The catalog covers the range 0.1 < z < 0.3 and includes 50,000 objects containing ten or more galaxies brighter than 0.4 L*. It successfully recovers luminous X-ray clusters, optically-selected clusters, and massive halos in mock galaxy catalogs with a low false-positive rate. Further details of the cluster finding algorithm and its performance, together with a description of the properties of the derived catalog will be presented.

  20. VizieR Online Data Catalog: Ages of SMC young clusters and field stars (Chiosi+, 2006)

    NASA Astrophysics Data System (ADS)

    Chiosi, E.; Vallenari, A.; Held, E. V.; Rizzi, L.; Moretti, A.

    2006-05-01

    We give the catalog of 462 clusters and associations in the Bar of the SMC. We make use of OGLE data. For each cluster we determine age a nd reddening. An index of the quality of the results is also given. (1 data file).

  1. VizieR Online Data Catalog: LAMOST DR2 star clusters candidate members (Zhang+, 2015)

    NASA Astrophysics Data System (ADS)

    Zhang, B.; Chen, X.-Y.; Liu, C.; Chen, L.; Deng, L.-C.; Hou, J.-L.; Shao, Z.-Y.; Yang, F.; Wu, Y.; Yang, M.; Zhang, Y.; Hou, Y.-H.; Wang, Y.-F.

    2015-11-01

    We adopt the Milky Way Star Cluster (MWSC) catalog (Kharchenko et al. 2012, Cat. J/A+A/543/A156; 2013, Cat. J/A+A/558/A53) as the list of target star clusters since it provides homogeneous parameters of Milky Way star clusters and is complete in the volume observed by LAMOST. Thus we use the MWSC radius parameters for star clusters, i.e., r0 in the MWSC is the angular radius of the core of the cluster, and r2 (hereafter rewritten as rc) stands for the angular radius of the cluster. A star cluster is covered by the LAMOST footprint if the number of stars located within 2rc of the cluster is larger than zero. In total, 457 star clusters, including open clusters, globular clusters, stellar associations and moving groups, are included in LAMOST DR2. (2 data files).

  2. VizieR Online Data Catalog: Abundances in Galactic open clusters (Marsakov+, 2016)

    NASA Astrophysics Data System (ADS)

    Marsakov, V. A.; Gozha, M. L.; Koval', V. V.; Shpigel', L. V.

    2016-07-01

    Spectroscopic determinations of the relative abundances of alpha-elements (O, Mg, Si, Ca, and Ti), slow neutron capture elements (Y, Ba, La, Ce, Nd, and Zr), rapid neutron capture element (Eu), and elements with an odd number of protons (Na, Al) are collected for 90 open clusters of the Galaxy. Metallicities are presented for 346 clusters. In addition catalog contains positions, ages, velocities, elements of Galactic orbits for open clusters. (2 data files).

  3. VizieR Online Data Catalog: Globular clusters as gravitational lenses (Bukhmastova, 2003)

    NASA Astrophysics Data System (ADS)

    Bukhmastova, Yu. L.

    2003-10-01

    We argue that globular clusters (GCs) are good candidates for gravitational lenses in explaining quasar-galaxy associations. The catalog of associations (Bukhmastova, 2001, Cat. ) compiled from the LEDA catalog of galaxies (Paturel, 1997A&AS..124..109P) and from the catalog of quasars (Veron-Cetty and Vero, 1998, see Cat. ) is used. Based on the new catalog, we show that one might expect an increased number of GCs around irregular galaxies of types 9 and 10 from the hypothesis that distant compact sources are gravitationally lensed by GCs in the halos of foreground galaxies. The King model is used to determine the central surface densities of 135 GCs in the Milky Way. The distribution of GCs in central surface density was found to be lognormal. (4 data files).

  4. Cross-correlating the γ-ray Sky with Catalogs of Galaxy Clusters

    NASA Astrophysics Data System (ADS)

    Branchini, Enzo; Camera, Stefano; Cuoco, Alessandro; Fornengo, Nicolao; Regis, Marco; Viel, Matteo; Xia, Jun-Qing

    2017-01-01

    We report the detection of a cross-correlation signal between Fermi Large Area Telescope diffuse γ-ray maps and catalogs of clusters. In our analysis, we considered three different catalogs: WHL12, redMaPPer, and PlanckSZ. They all show a positive correlation with different amplitudes, related to the average mass of the objects in each catalog, which also sets the catalog bias. The signal detection is confirmed by the results of a stacking analysis. The cross-correlation signal extends to rather large angular scales, around 1°, that correspond, at the typical redshift of the clusters in these catalogs, to a few to tens of megaparsecs, i.e., the typical scale-length of the large-scale structures in the universe. Most likely this signal is contributed by the cumulative emission from active galactic nuclei (AGNs) associated with the filamentary structures that converge toward the high peaks of the matter density field in which galaxy clusters reside. In addition, our analysis reveals the presence of a second component, more compact in size and compatible with a point-like emission from within individual clusters. At present, we cannot distinguish between the two most likely interpretations for such a signal, i.e., whether it is produced by AGNs inside clusters or if it is a diffuse γ-ray emission from the intracluster medium. We argue that this latter, intriguing, hypothesis might be tested by applying this technique to a low-redshift large-mass cluster sample.

  5. Clustering LC Classification Numbers in an Online Catalog for Improved Browsability.

    ERIC Educational Resources Information Center

    Huestis, Jeffrey C.

    1988-01-01

    Describes the role of browsing in online searching and difficulties encountered in attempting to browse call number indexes. The discussion covers the benefits of clustering class number ranges and strategies for overcoming the major problems related to Library of Congress classification use in an online catalog. (11 references) (CLB)

  6. VizieR Online Data Catalog: Proper motions of open clusters from UCAC4 (Dias+, 2014)

    NASA Astrophysics Data System (ADS)

    Dias, W. S.; Monteiro, H.; Caetano, T. C.; Lepine, J. R. D.; Assafin, M.; Oliveira, A. F.

    2014-04-01

    We present a catalog of mean proper motions and membership probabilities of individual stars for optically visible open clusters, which have been determined using data from the UCAC4 catalog in a homogeneous way. The mean proper motion of the cluster and the membership probabilities of the stars in the region of each cluster were determined by applying the statistical method in a modified fashion. In this study, we applied a global optimization procedure to fit the observed distribution of proper motions with two overlapping normal bivariate frequency functions, which also take the individual proper motion errors into account. For 724 clusters, this is the first determination of proper motion, and for the whole sample, we present results with a much larger number of identified astrometric member stars. Furthermore, it was possible to estimate the mean radial velocity of 364 clusters (102 unpublished so far) with the stellar membership using published radial velocity catalogs. These results provide an increase of 30% and 19% in the sample of open clusters with a determined mean absolute proper motion and mean radial velocity, respectively. (5 data files).

  7. Proper motions of the optically visible open clusters based on the UCAC4 catalog

    NASA Astrophysics Data System (ADS)

    Dias, W. S.; Monteiro, H.; Caetano, T. C.; Lépine, J. R. D.; Assafin, M.; Oliveira, A. F.

    2014-04-01

    We present a catalog of mean proper motions and membership probabilities of individual stars for optically visible open clusters, which have been determined using data from the UCAC4 catalog in a homogeneous way. The mean proper motion of the cluster and the membership probabilities of the stars in the region of each cluster were determined by applying the statistical method in a modified fashion. In this study, we applied a global optimization procedure to fit the observed distribution of proper motions with two overlapping normal bivariate frequency functions, which also take the individual proper motion errors into account. For 724 clusters, this is the first determination of proper motion, and for the whole sample, we present results with a much larger number of identified astrometric member stars. Furthermore, it was possible to estimate the mean radial velocity of 364 clusters (102 unpublished so far) with the stellar membership using published radial velocity catalogs. These results provide an increase of 30% and 19% in the sample of open clusters with a determined mean absolute proper motion and mean radial velocity, respectively. Tables 2 to 1809 are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/564/A79

  8. The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. VIII. Preliminary Public Catalog Release

    NASA Astrophysics Data System (ADS)

    Soto, M.; Bellini, A.; Anderson, J.; Piotto, G.; Bedin, L. R.; van der Marel, R. P.; Milone, A. P.; Brown, T. M.; Cool, A. M.; King, I. R.; Sarajedini, A.; Granata, V.; Cassisi, S.; Aparicio, A.; Hidalgo, S.; Ortolani, S.; Nardiello, D.

    2017-01-01

    The Hubble Space Telescope (HST) UV Legacy Survey of Galactic Globular Clusters (GO-13297) has been specifically designed to complement the existing F606W and F814W observations of the Advanced Camera for Surveys (ACS) Globular Cluster Survey (GO-10775) by observing the most accessible 47 of the previous survey’s 65 clusters in three WFC3/UVIS filters F275W, F336W, and F438W. The new survey also adds super-solar metallicity open cluster NGC 6791 to increase the metallicity diversity. The combined survey provides a homogeneous 5-band data set that can be used to pursue a broad range of scientific investigations. In particular, the chosen UV filters allow the identification of multiple stellar populations by targeting the regions of the spectrum that are sensitive to abundance variations in C, N, and O. In order to provide the community with uniform preliminary catalogs, we have devised an automated procedure that performs high-quality photometry on the new UV observations (along with similar observations of seven other programs in the archive). This procedure finds and measures the potential sources on each individual exposure using library point-spread functions and cross-correlates these observations with the original ACS-Survey catalog. The catalog of 57 clusters we publish here will be useful to identify stars in the different stellar populations, in particular for spectroscopic follow-up. Eventually, we will construct a more sophisticated catalog and artificial-star tests based on an optimal reduction of the UV survey data, but the catalogs presented here give the community the chance to make early use of this HST Treasury survey.

  9. Deep Galex Observations of the Coma Cluster: Source Catalog and Galaxy Counts

    NASA Technical Reports Server (NTRS)

    Hammer, D.; Hornschemeier, A. E.; Mobasher, B.; Miller, N.; Smith, R.; Arnouts, S.; Milliard, B.; Jenkins, L.

    2010-01-01

    We present a source catalog from deep 26 ks GALEX observations of the Coma cluster in the far-UV (FUV; 1530 Angstroms) and near-UV (NUV; 2310 Angstroms) wavebands. The observed field is centered 0.9 deg. (1.6 Mpc) south-west of the Coma core, and has full optical photometric coverage by SDSS and spectroscopic coverage to r-21. The catalog consists of 9700 galaxies with GALEX and SDSS photometry, including 242 spectroscopically-confirmed Coma member galaxies that range from giant spirals and elliptical galaxies to dwarf irregular and early-type galaxies. The full multi-wavelength catalog (cluster plus background galaxies) is 80% complete to NUV=23 and FUV=23.5, and has a limiting depth at NUV=24.5 and FUV=25.0 which corresponds to a star formation rate of 10(exp -3) solar mass yr(sup -1) at the distance of Coma. The GALEX images presented here are very deep and include detections of many resolved cluster members superposed on a dense field of unresolved background galaxies. This required a two-fold approach to generating a source catalog: we used a Bayesian deblending algorithm to measure faint and compact sources (using SDSS coordinates as a position prior), and used the GALEX pipeline catalog for bright and/or extended objects. We performed simulations to assess the importance of systematic effects (e.g. object blends, source confusion, Eddington Bias) that influence source detection and photometry when using both methods. The Bayesian deblending method roughly doubles the number of source detections and provides reliable photometry to a few magnitudes deeper than the GALEX pipeline catalog. This method is also free from source confusion over the UV magnitude range studied here: conversely, we estimate that the GALEX pipeline catalogs are confusion limited at NUV approximately 23 and FUV approximately 24. We have measured the total UV galaxy counts using our catalog and report a 50% excess of counts across FUV=22-23.5 and NUV=21.5-23 relative to previous GALEX

  10. Young Super Star Clusters in the Starburst of M82: The Catalog

    NASA Astrophysics Data System (ADS)

    Melo, V. P.; Muñoz-Tuñón, C.; Maíz-Apellániz, J.; Tenorio-Tagle, G.

    2005-01-01

    Recent results from the Hubble Space Telescope (HST) have resolved starbursts as collections of compact young stellar clusters. Here we present a photometric catalog of the young stellar clusters in the nuclear starburst of M82, observed with the HST WFPC2 in Hα (F656N) and in four optical broadband filters. We identify 197 young super stellar clusters. The compactness and high density of the sources led us to develop specific techniques to measure their sizes. Strong extinction lanes divide the starburst into five different zones, and we provide a catalog of young super star clusters for each of these. In the catalog we include relative coordinates, radii, fluxes, luminosities, masses, equivalent widths, extinctions, and other parameters. Extinction values have been derived from the broadband images. The radii range between 3 and 9 pc, with a mean value of 5.7+/-1.4 pc, and a stellar mass between 104 and 106 Msolar. The inferred masses and mean separation, comparable to the size of the super star clusters, together with their high volume density, provide strong evidence for the key ingredients postulated by Tenorio-Tagle and coworkers as required for the development of a supergalactic wind. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute. STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.

  11. VizieR Online Data Catalog: Updated catalog of variable stars in globular clusters (Clement+ 2017)

    NASA Astrophysics Data System (ADS)

    Clement, C. M.

    2017-02-01

    This Catalogue is an update to Helen Sawyer Hogg's Third Catalogue on Variable Stars in Globular Clusters (1973, David Dunlap Observatory Publications, Volume 3, Number 6: 1973PDDO....3....6S; see Cat V/97; see also Clement+, 2001AJ....122.2587C). This catalogue is based on the individual cluster files downloaded on http://www.astro.utoronto.ca/~cclement/cat/listngc.html on the 01-Feb-2017. (7 data files).

  12. THE SWIFT X-RAY TELESCOPE CLUSTER SURVEY. III. CLUSTER CATALOG FROM 2005-2012 ARCHIVAL DATA

    SciTech Connect

    Liu, Teng; Wang, Jun-Xian; Tozzi, Paolo; Tundo, Elena; Moretti, Alberto; Rosati, Piero; Tagliaferri, Gianpiero; Campana, Sergio; Giavalisco, Mauro

    2015-02-01

    We present the Swift X-ray Cluster Survey (SWXCS) catalog obtained using archival data from the X-ray telescope (XRT) on board the Swift satellite acquired from 2005 February to 2012 November, extending the first release of the SWXCS. The catalog provides positions, soft fluxes, and, when possible, optical counterparts for a flux-limited sample of X-ray group and cluster candidates. We consider the fields with Galactic latitude |b| > 20° to avoid high H I column densities. We discard all of the observations targeted at groups or clusters of galaxies, as well as particular extragalactic fields not suitable to search for faint extended sources. We finally select ∼3000 useful fields covering a total solid angle of ∼400 deg{sup 2}. We identify extended source candidates in the soft-band (0.5-2 keV) images of these fields using the software EXSdetect, which is specifically calibrated for the XRT data. Extensive simulations are used to evaluate contamination and completeness as a function of the source signal, allowing us to minimize the number of spurious detections and to robustly assess the selection function. Our catalog includes 263 candidate galaxy clusters and groups down to a flux limit of 7 × 10{sup –15} erg cm{sup –2} s{sup –1} in the soft band, and the logN-logS is in very good agreement with previous deep X-ray surveys. The final list of sources is cross-correlated with published optical, X-ray, and Sunyaev-Zeldovich catalogs of clusters. We find that 137 sources have been previously identified as clusters in the literature in independent surveys, while 126 are new detections. Currently, we have collected redshift information for 158 sources (60% of the entire sample). Once the optical follow-up and the X-ray spectral analysis of the sources are complete, the SWXCS will provide a large and well-defined catalog of groups and clusters of galaxies to perform statistical studies of cluster properties and tests of cosmological models.

  13. The Swift X-Ray Telescope Cluster Survey. III. Cluster Catalog from 2005-2012 Archival Data

    NASA Astrophysics Data System (ADS)

    Liu, Teng; Tozzi, Paolo; Tundo, Elena; Moretti, Alberto; Rosati, Piero; Wang, Jun-Xian; Tagliaferri, Gianpiero; Campana, Sergio; Giavalisco, Mauro

    2015-02-01

    We present the Swift X-ray Cluster Survey (SWXCS) catalog obtained using archival data from the X-ray telescope (XRT) on board the Swift satellite acquired from 2005 February to 2012 November, extending the first release of the SWXCS. The catalog provides positions, soft fluxes, and, when possible, optical counterparts for a flux-limited sample of X-ray group and cluster candidates. We consider the fields with Galactic latitude |b| > 20° to avoid high H I column densities. We discard all of the observations targeted at groups or clusters of galaxies, as well as particular extragalactic fields not suitable to search for faint extended sources. We finally select ~3000 useful fields covering a total solid angle of ~400 deg2. We identify extended source candidates in the soft-band (0.5-2 keV) images of these fields using the software EXSdetect, which is specifically calibrated for the XRT data. Extensive simulations are used to evaluate contamination and completeness as a function of the source signal, allowing us to minimize the number of spurious detections and to robustly assess the selection function. Our catalog includes 263 candidate galaxy clusters and groups down to a flux limit of 7 × 10-15 erg cm-2 s-1 in the soft band, and the logN-logS is in very good agreement with previous deep X-ray surveys. The final list of sources is cross-correlated with published optical, X-ray, and Sunyaev-Zeldovich catalogs of clusters. We find that 137 sources have been previously identified as clusters in the literature in independent surveys, while 126 are new detections. Currently, we have collected redshift information for 158 sources (60% of the entire sample). Once the optical follow-up and the X-ray spectral analysis of the sources are complete, the SWXCS will provide a large and well-defined catalog of groups and clusters of galaxies to perform statistical studies of cluster properties and tests of cosmological models.

  14. Robust Quantification of Earthquake Clustering: Overcoming the Artifacts of Catalog Errors

    NASA Astrophysics Data System (ADS)

    Zaliapin, I. V.; Ben-Zion, Y.

    2014-12-01

    Quantitative characterization of earthquake clustering in space and time in relation to different event sizes and physical properties of the lithosphere are fundamental problems of statistical seismology. Recently, we approached these problems by taking advantage of the new statistical results, improved empirical constraints, and relatively uniform high-quality earthquake catalogs available for southern California and other selected regions. This led to identification and classification of statistically significant earthquake clusters in southern California, relating cluster characteristics to effective viscosity of the crust, and documenting some robust properties of observed earthquakes not simulated by the Epidemic Type Aftershock Sequence (ETAS) model. Extending these results to other seismically active areas and lower magnitude ranges, however, is impeded by inferior data quality. Most available catalogs are based on non-uniform recordings/analyses that lead to non-uniform (in space, time, magnitude) location errors, varying magnitude of completeness, and other problems. These non-uniformities may (and do) produce artificial patterns in the space-time-magnitude clusters of seismicity detected by our, as well as other, methods. In the present work we document the effects of catalog errors on inferred cluster properties, and report some striking patterns that emerge as artifacts of those errors. This includes apparent magnitude dependence, fluctuations in the proportion of singles (clusters consisting of individual events), space-dependent distance to the likely parents of events, and other effects. We also discuss additional differences between the ETAS model and observed seismicity. Finally, we propose a generalization of our method that involves assigning multiple possible parents to each event, and discuss some graph-theoretic techniques that may provide results that are more robust to location errors and other catalog deficiencies.

  15. Percolation galaxy groups and clusters in the sdss redshift survey: identification, catalogs, and the multiplicity function

    SciTech Connect

    Berlind, Andreas A.; Frieman, Joshua A.; Weinberg, David H.; Blanton, Michael R.; Warren, Michael S.; Abazajian, Kevork; Scranton, Ryan; Hogg, David W.; Scoccimarro, Roman; Bahcall, Neta A.; Brinkmann, J.; Gott, J.Richard, III; Kleinman, S.J.; Krzesinski, J.; Lee, Brian C.; Miller, Christopher J.; Nitta, Atsuko; Schneider, Donald P.; Tucker, Douglas L.; Zehavi, Idit; /CCPP, New York /Chicago U., Astron. Astrophys. Ctr. /Ohio State U., Dept. Astron. /Los Alamos /Pittsburgh U. /Princeton U. /Subaru Telescope /Apache Point Observ. /Mt. Suhora Observ., Cracow /LBL, Berkeley /Cerro-Tololo InterAmerican Obs. /Penn State U., Astron. Astrophys. /Fermilab /Arizona U., Astron. Dept. - Steward Observ. /Case Western Reserve U.

    2006-01-01

    We identify galaxy groups and clusters in volume-limited samples of the SDSS redshift survey, using a redshift-space friends-of-friends algorithm. We optimize the friends-of-friends linking lengths to recover galaxy systems that occupy the same dark matter halos, using a set of mock catalogs created by populating halos of N-body simulations with galaxies. Extensive tests with these mock catalogs show that no combination of perpendicular and line-of-sight linking lengths is able to yield groups and clusters that simultaneously recover the true halo multiplicity function, projected size distribution, and velocity dispersion. We adopt a linking length combination that yields, for galaxy groups with ten or more members: a group multiplicity function that is unbiased with respect to the true halo multiplicity function; an unbiased median relation between the multiplicities of groups and their associated halos; a spurious group fraction of less than {approx}1%; a halo completeness of more than {approx}97%; the correct projected size distribution as a function of multiplicity; and a velocity dispersion distribution that is {approx}20% too low at all multiplicities. These results hold over a range of mock catalogs that use different input recipes of populating halos with galaxies. We apply our group-finding algorithm to the SDSS data and obtain three group and cluster catalogs for three volume-limited samples that cover 3495.1 square degrees on the sky. We correct for incompleteness caused by fiber collisions and survey edges, and obtain measurements of the group multiplicity function, with errors calculated from realistic mock catalogs. These multiplicity function measurements provide a key constraint on the relation between galaxy populations and dark matter halos.

  16. A catalog of clusters to z ≤ 1 from the Oxford Dartmouth Thirty Degree Survey

    NASA Astrophysics Data System (ADS)

    Hammell, Molly C.

    2004-06-01

    A sample of 46 previously unidentified, intermediate- to high-redshift, near-infrared (NIR)-selected galaxy clusters have been discovered in the Andromeda catalog of the Oxford Dartmouth Thirty Degree Survey (ODTS). These clusters vary from low- to high-redshift in distance, 0.1 < z < 0.8, and span galaxy count ranges from poor to rich clusters, richnesses of 10 < NAbell < 100. The clusters were selected from a contiguous field of 1.5 square degrees, imaged in 5 optical passbands, U, B, V, R, i', and one NIR passband, K. Two algorithms were developed to select the clusters from this multi-color dataset, the ODT Friends (ODTF) and the Brightest-color (BC). The ODTF method adapts the classical friends-of- friends method for use with photometric redshifts. The BC technique takes advantage of previous observations that clusters tend to be dominated by a large early-type galaxy, and that nearly all of the early-type galaxies in the cluster occupy a small space in color-magnitude diagrams. Extensive simulations with artificial galaxies have been performed to test how well these algorithms select clusters as a function of cluster richness and redshift. The ODTF method successfully recovers a larger fraction of the artificial clusters at higher redshift and lower richness class than the BC method, but this method also suffers from a larger number of false cluster identifications than the BC method. After correcting for the selection function and false detection rate of our algorithms, the abundances of ODTS clusters were compared to cluster counts found in other comparable surveys and to the abundance of clusters predicted by models of cluster formation. The ODT cluster number densities are very similar to other comparable surveys. The ODT cluster mass function is consistent with other surveys, and all of these surveys are broadly consistent with a range of cosmological models.

  17. A Catalog of Galaxy Clusters Observed by XMM-Newton

    NASA Technical Reports Server (NTRS)

    Snowden, S. L.; Mushotzky, R. M.; Kuntz, K. D.; Davis, David S.

    2007-01-01

    Images and the radial profiles of the temperature, abundance, and brightness for 70 clusters of galaxies observed by XMM-Newton are presented along with a detailed discussion of the data reduction and analysis methods, including background modeling, which were used in the processing. Proper consideration of the various background components is vital to extend the reliable determination of cluster parameters to the largest possible cluster radii. The various components of the background including the quiescent particle background, cosmic diffuse emission, soft proton contamination, and solar wind charge exchange emission are discussed along with suggested means of their identification, filtering, and/or their modeling and subtraction. Every component is spectrally variable, sometimes significantly so, and all components except the cosmic background are temporally variable as well. The distributions of the events over the FOV vary between the components, and some distributions vary with energy. The scientific results from observations of low surface brightness objects and the diffuse background itself can be strongly affected by these background components and therefore great care should be taken in their consideration.

  18. New machine-readable version of Abell catalog of clusters of galaxies

    NASA Astrophysics Data System (ADS)

    Kalinkov, M.; Stavrev, K. Y.; Kuneva, I. F.

    An improved version of the magnetic-tape catalog of Abell and Zwicky clusters of galaxies (Kalinkov et al., 1976) is briefly characterized, with an emphasis on the distance-calibration and homogenization techniques employed in its compilation. The distance calibration is improved by performing regression analyses on clusters of known Bautz-Morgan type; parameter and standard-deviation values are presented in a table. Selection effects are investigated, and it is shown that the increase in absolute magnitude estimates with distance is less pronounced for the values based on the photored magnitude of the first-rank galaxy (Leir and van den Bergh, 1977) than for those determined by Abell (1958).

  19. A Photometric redshift galaxy catalog from the Red-Sequence Cluster Survey

    SciTech Connect

    Hsieh, Bau-Ching; Yee, H.K.C.; Lin, H.; Gladders, M.D.; /Carnegie Inst. Observ.

    2005-02-01

    The Red-Sequence Cluster Survey (RCS) provides a large and deep photometric catalog of galaxies in the z' and R{sub c} bands for 90 square degrees of sky, and supplemental V and B data have been obtained for 33.6 deg{sup 2}. They compile a photometric redshift catalog from these 4-band data by utilizing the empirical quadratic polynomial photometric redshift fitting technique in combination with CNOC2 and GOODS/HDF-N redshift data. The training set includes 4924 spectral redshifts. The resulting catalog contains more than one million galaxies with photometric redshifts < 1.5 and R{sub c} < 24, giving an rms scatter {delta}({Delta}z) < 0.06 within the redshift range 0.2 < z < 0.5 and {sigma}({Delta}z) < 0.11 for galaxies at 0.0 < z < 1.5. They describe the empirical quadratic polynomial photometric redshift fitting technique which they use to determine the relation between red-shift and photometry. A kd-tree algorithm is used to divide up the sample to improve the accuracy of the catalog. They also present a method for estimating the photometric redshift error for individual galaxies. They show that the redshift distribution of the sample is in excellent agreement with smaller and much deeper photometric and spectroscopic redshift surveys.

  20. Catalog of Positions and Spectroscopic Properties of Galaxies in the A1367 Cluster

    NASA Astrophysics Data System (ADS)

    Lipovka, N. M.; Saucedo Morales, J. C.; Lipovka, A. A.; Boldycheva, A. V.; Maslennikov, K. L.

    2007-05-01

    In the present work the results of an optical spectroscopy study of 8 galaxies projected in the central part of the A1367 cluster are reported. The observations were made using the 2.2 m. Guillermo Haro Telescope in Cananea (Mexico), and the Boller and Chivens spectrograph. A catalog of the optical positions of more than 100 galaxies in the cluster is presented. The redshifts of 7 galaxies were determined from their absorption systems, while for the remaining galaxy was obtained from its strong emission lines of H-alpha, S II, O III and H-beta. For one of the galaxies the emission redshift is z=0.015, not showing absorptions lines at the cluster redshifts (z=0.026), which argues that it is located between the observer and the A1367 cluster.

  1. The RedMaPPer Galaxy Cluster Catalog From DES Science Verification Data

    NASA Astrophysics Data System (ADS)

    Rykoff, E. S.; Rozo, E.; Hollowood, D.; Bermeo-Hernandez, A.; Jeltema, T.; Mayers, J.; Romer, A. K.; Rooney, P.; Saro, A.; Vergara Cervantes, C.; Wechsler, R. H.; Wilcox, H.; Abbott, T. M. C.; Abdalla, F. B.; Allam, S.; Annis, J.; Benoit-Lévy, A.; Bernstein, G. M.; Bertin, E.; Brooks, D.; Burke, D. L.; Capozzi, D.; Carnero Rosell, A.; Carrasco Kind, M.; Castander, F. J.; Childress, M.; Collins, C. A.; Cunha, C. E.; D'Andrea, C. B.; da Costa, L. N.; Davis, T. M.; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Doel, P.; Evrard, A. E.; Finley, D. A.; Flaugher, B.; Fosalba, P.; Frieman, J.; Glazebrook, K.; Goldstein, D. A.; Gruen, D.; Gruendl, R. A.; Gutierrez, G.; Hilton, M.; Honscheid, K.; Hoyle, B.; James, D. J.; Kay, S. T.; Kuehn, K.; Kuropatkin, N.; Lahav, O.; Lewis, G. F.; Lidman, C.; Lima, M.; Maia, M. A. G.; Mann, R. G.; Marshall, J. L.; Martini, P.; Melchior, P.; Miller, C. J.; Miquel, R.; Mohr, J. J.; Nichol, R. C.; Nord, B.; Ogando, R.; Plazas, A. A.; Reil, K.; Sahlén, M.; Sanchez, E.; Santiago, B.; Scarpine, V.; Schubnell, M.; Sevilla-Noarbe, I.; Smith, R. C.; Soares-Santos, M.; Sobreira, F.; Stott, J. P.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Thomas, D.; Tucker, D.; Uddin, S.; Viana, P. T. P.; Vikram, V.; Walker, A. R.; Zhang, Y.; DES Collaboration

    2016-05-01

    We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to 150 {{deg}}2 of Science Verification (SV) data from the Dark Energy Survey (DES), and to the Sloan Digital Sky Survey (SDSS) DR8 photometric data set. The DES SV catalog is locally volume limited and contains 786 clusters with richness λ \\gt 20 (roughly equivalent to {M}{{500c}}≳ {10}14 {h}70-1 {M}⊙ ) and 0.2\\lt z\\lt 0.9. The DR8 catalog consists of 26,311 clusters with 0.08\\lt z\\lt 0.6, with a sharply increasing richness threshold as a function of redshift for z≳ 0.35. The photometric redshift performance of both catalogs is shown to be excellent, with photometric redshift uncertainties controlled at the {σ }z/(1+z)˜ 0.01 level for z≲ 0.7, rising to ˜0.02 at z˜ 0.9 in DES SV. We make use of Chandra and XMM X-ray and South Pole Telescope Sunyaev-Zeldovich data to show that the centering performance and mass-richness scatter are consistent with expectations based on prior runs of redMaPPer on SDSS data. We also show how the redMaPPer photo-z and richness estimates are relatively insensitive to imperfect star/galaxy separation and small-scale star masks.

  2. The redMaPPer Galaxy Cluster Catalog From DES Science Verification Data

    SciTech Connect

    Rykoff, E. S.

    2016-04-29

    We describe updates to the redMaPPer algorithm, a photometric red-sequence cluster finder specifically designed for large photometric surveys. The updated algorithm is applied to $150\\,\\mathrm{deg}^2$ of Science Verification (SV) data from the Dark Energy Survey (DES), and to the Sloan Digital Sky Survey (SDSS) DR8 photometric data set. The DES SV catalog is locally volume limited, and contains 786 clusters with richness $\\lambda>20$ (roughly equivalent to $M_{\\mathrm{500c}}\\gtrsim10^{14}\\,h_{70}^{-1}\\,M_{\\odot}$) and 0.2 < $z$ <0.9. The DR8 catalog consists of 26311 clusters with 0.08 < $z$ < 0.6, with a sharply increasing richness threshold as a function of redshift for $z\\gtrsim 0.35$. The photometric redshift performance of both catalogs is shown to be excellent, with photometric redshift uncertainties controlled at the $\\sigma_z/(1+z)\\sim 0.01$ level for $z\\lesssim0.7$, rising to $\\sim0.02$ at $z\\sim0.9$ in DES SV. We make use of $Chandra$ and $XMM$ X-ray and South Pole Telescope Sunyaev-Zeldovich data to show that the centering performance and mass--richness scatter are consistent with expectations based on prior runs of redMaPPer on SDSS data. We also show how the redMaPPer photo-$z$ and richness estimates are relatively insensitive to imperfect star/galaxy separation and small-scale star masks.

  3. VizieR Online Data Catalog: WINGS: Deep optical phot. of 77 nearby clusters (Varela+, 2009)

    NASA Astrophysics Data System (ADS)

    Varela, J.; D'Onofrio, M.; Marmo, C.; Fasano, G.; Bettoni, D.; Cava, A.; Couch, J. W.; Dressler, A.; Kjaergaard, P.; Moles, M.; Pignatelli, E.; Poggianti, M. B.; Valentinuzzi, T.

    2009-05-01

    This is the second paper of a series devoted to the WIde Field Nearby Galaxy-cluster Survey (WINGS). WINGS is a long term project which is gathering wide-field, multi-band imaging and spectroscopy of galaxies in a complete sample of 77 X-ray selected, nearby clusters (0.04200deg). The main goal of this project is to establish a local reference for evolutionary studies of galaxies and galaxy clusters. This paper presents the optical (B,V) photometric catalogs of the WINGS sample and describes the procedures followed to construct them. We have paid special care to correctly treat the large extended galaxies (which includes the brightest cluster galaxies) and the reduction of the influence of the bright halos of very bright stars. We have constructed photometric catalogs based on wide-field images in B and V bands using SExtractor. Photometry has been performed on images in which large galaxies and halos of bright stars were removed after modeling them with elliptical isophotes. We publish deep optical photometric catalogs (90% complete at V21.7, which translates to ~ MV* + 6 at mean redshift), giving positions, geometrical parameters, and several total and aperture magnitudes for all the objects detected. For each field we have produced three catalogs containing galaxies, stars and objects of "unknown" classification (~16%). From simulations we found that the uncertainty of our photometry is quite dependent of the light profile of the objects with stars having the most robust photometry and de Vaucouleurs profiles showing higher uncertainties and also an additional bias of ~-0.2m. The star/galaxy classification of the bright objects (V<20) was checked visually making negligible the fraction of misclassified objects. For fainter objects, we found that simulations do not provide reliable estimates of the possible misclassification and therefore we have compared our data with that from deep counts of galaxies and star counts from models of our Galaxy. Both sets turned

  4. Hubble Space Telescope Proper Motion (HSTPROMO) Catalogs of Galactic Globular Cluster. II. Kinematic Profiles and Maps

    NASA Astrophysics Data System (ADS)

    Watkins, Laura L.; van der Marel, Roeland P.; Bellini, Andrea; Anderson, Jay

    2015-04-01

    We present kinematical analyses of 22 Galactic globular clusters using the Hubble Space Telescope proper motion catalogs recently presented in Bellini et al. For most clusters, this is the first proper-motion study ever performed, and, for many, this is the most detailed kinematic study of any kind. We use cleaned samples of bright stars to determine binned velocity-dispersion and velocity-anisotropy radial profiles and two-dimensional velocity-dispersion spatial maps. Using these profiles, we search for correlations between cluster kinematics and structural properties. We find the following: (1) more centrally concentrated clusters have steeper radial velocity-dispersion profiles; (2) on average, at 1σ confidence in two dimensions, the photometric and kinematic centers of globular clusters agree to within ˜1″, with a cluster-to-cluster rms of 4″(including observational uncertainties); (3) on average, the cores of globular clusters have isotropic velocity distributions to within 1% ({{σ }t}/{{σ }r}=0.992+/- 0.005), with a cluster-to-cluster rms of 2% (including observational uncertainties); (4) clusters generally have mildly radially anisotropic velocity distributions ({{σ }t}/{{σ }r}≈ 0.8-1.0) near the half-mass-radius, with bigger deviations from isotropy for clusters with longer relaxation times; and (5) there is a relation between {{σ }minor}/{{σ }major} and ellipticity, such that the more flattened clusters in the sample tend to be more anisotropic, with {{σ }minor}/{{σ }major}≈ 0.9-1.0. Aside from these general results and correlations, the profiles and maps presented here can provide a basis for detailed dynamical modeling of individual globular clusters. Given the quality of the data, this is likely to provide new insights into a range of topics concerning globular cluster mass profiles, structure, and dynamics. Based on proprietary and archival observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science

  5. Spitzer’s View of the Candidate Cluster and Protocluster Catalog (CCPC)

    NASA Astrophysics Data System (ADS)

    Franck, J. R.; McGaugh, S. S.

    2017-02-01

    The Candidate Cluster and Protocluster Catalog contains 218 galaxy overdensities composed of more than 2000 galaxies with spectroscopic redshifts spanning the first few Gyr after the Big Bang (2.0 ≤ z < 6.6). We use Spitzer archival data to track the underlying stellar mass of these overdense regions in various temporal cross sections by building rest-frame near-infrared luminosity functions (LFs) across the span of redshifts. This exercise maps the stellar growth of protocluster galaxies, as halos in the densest environments should be the most massive from hierarchical accretion. The characteristic apparent magnitude, m*(z), is relatively flat from 2.0 ≤ z < 6.6, consistent with a passive evolution of an old stellar population. This trend maps smoothly to lower redshift results of cluster galaxies from other works. We find no difference in the LFs of galaxies in the field versus protoclusters at a given redshift apart from their density.

  6. A catalog of galaxies in and around the cluster A1367. Spectral studies of several galaxies

    NASA Astrophysics Data System (ADS)

    Boldycheva, A. V.; Lipovka, A. A.; Lipovka, N. M.; Maslennikov, K. L.; Sausedo, J.

    2010-08-01

    We present a catalog of galaxies in and around the cluster A1367, together with the results of a spectroscopic study of eight faint galaxies projected onto the central part of the cluster. The observations were carried out with the Boller and Chivens spectrograph of the 2m telescope of the Guillermo Haro Observatory (Cananea, Mexico). Redshifts of eight galaxies were derived from both emission and absorption lines; the redshift for one of these, derived from H α, SII, OIII, and H β emission lines, is z = 0.015. The spectrum of this galaxy displays no absorption lines at z = 0.026, testifying that it is located between the observer and A1367.

  7. Automatic identification of seismic swarms and other spatio-temporal clustering from catalogs

    NASA Astrophysics Data System (ADS)

    Nava, F. Alejandro; Glowacka, Ewa

    1994-06-01

    Statistical analysis of seismic catalogs usually requires identification of swarms and foreshocks-main event-aftershocks sequences-a tedious and time-consuming chore. SWaRMSHoW, a simple but versatile QBASIC program for PC, graphically displays on screen catalog epicentral activity, with optional temporal distribution scaling; identifies spatio-temporal hypocentral clusters (SwrSeq) which may be swarms or foreshocks-main event-aftershocks sequences and discriminates between these; and displays SwrSeq locations and limits, and assigns them equivalent magnitudes corresponding to those of single events having seismic energy equal to that of the whole SwrSeq. SWaRMSHoW features optional detailed disk output of swarms and clusters, including origin time, location, constituent events, equivalent magnitudes, and current parameters, that allows easy application of results. Graphic screen display includes optional maps and drawings. Operation can be completely automatic or interactive. Working parameters can be reset at any time during operation. Besides swarm and sequence identification, this program's modeling of the seismicity, scaled in both space and time, is useful for studying many aspects of spatio-temporal seismicity, such as fault activation, migration of activity, quiescence, etc.

  8. The HST/ACS Coma Cluster Survey. II. Data Description and Source Catalogs

    NASA Astrophysics Data System (ADS)

    Hammer, Derek; Verdoes Kleijn, Gijs; Hoyos, Carlos; den Brok, Mark; Balcells, Marc; Ferguson, Henry C.; Goudfrooij, Paul; Carter, David; Guzmán, Rafael; Peletier, Reynier F.; Smith, Russell J.; Graham, Alister W.; Trentham, Neil; Peng, Eric; Puzia, Thomas H.; Lucey, John R.; Jogee, Shardha; Aguerri, Alfonso L.; Batcheldor, Dan; Bridges, Terry J.; Chiboucas, Kristin; Davies, Jonathan I.; del Burgo, Carlos; Erwin, Peter; Hornschemeier, Ann; Hudson, Michael J.; Huxor, Avon; Jenkins, Leigh; Karick, Arna; Khosroshahi, Habib; Kourkchi, Ehsan; Komiyama, Yutaka; Lotz, Jennifer; Marzke, Ronald O.; Marinova, Irina; Matkovic, Ana; Merritt, David; Miller, Bryan W.; Miller, Neal A.; Mobasher, Bahram; Mouhcine, Mustapha; Okamura, Sadanori; Percival, Sue; Phillipps, Steven; Poggianti, Bianca M.; Price, James; Sharples, Ray M.; Tully, R. Brent; Valentijn, Edwin

    2010-11-01

    The Coma cluster, Abell 1656, was the target of an HST-ACS Treasury program designed for deep imaging in the F475W and F814W passbands. Although our survey was interrupted by the ACS instrument failure in early 2007, the partially completed survey still covers ~50% of the core high-density region in Coma. Observations were performed for 25 fields that extend over a wide range of cluster-centric radii (~1.75 Mpc or 1°) with a total coverage area of 274 arcmin2. The majority of the fields are located near the core region of Coma (19/25 pointings) with six additional fields in the southwest region of the cluster. In this paper, we present reprocessed images and SEXTRACTOR source catalogs for our survey fields, including a detailed description of the methodology used for object detection and photometry, the subtraction of bright galaxies to measure faint underlying objects, and the use of simulations to assess the photometric accuracy and completeness of our catalogs. We also use simulations to perform aperture corrections for the SEXTRACTOR Kron magnitudes based only on the measured source flux and its half-light radius. We have performed photometry for ~73,000 unique objects; approximately one-half of our detections are brighter than the 10σ point-source detection limit at F814W = 25.8 mag (AB). The slight majority of objects (60%) are unresolved or only marginally resolved by ACS. We estimate that Coma members are 5%-10% of all source detections, which consist of a large population of unresolved compact sources (primarily globular clusters but also ultra-compact dwarf galaxies) and a wide variety of extended galaxies from a cD galaxy to dwarf low surface brightness galaxies. The red sequence of Coma member galaxies has a color-magnitude relation with a constant slope and dispersion over 9 mag (-21 < M F814W < -13). The initial data release for the HST-ACS Coma Treasury program was made available to the public in 2008 August. The images and catalogs described in

  9. The Herschel Virgo Cluster Survey. XVII. SPIRE point-source catalogs and number counts

    NASA Astrophysics Data System (ADS)

    Pappalardo, Ciro; Bendo, George J.; Bianchi, Simone; Hunt, Leslie; Zibetti, Stefano; Corbelli, Edvige; di Serego Alighieri, Sperello; Grossi, Marco; Davies, Jonathan; Baes, Maarten; De Looze, Ilse; Fritz, Jacopo; Pohlen, Michael; Smith, Matthew W. L.; Verstappen, Joris; Boquien, Médéric; Boselli, Alessandro; Cortese, Luca; Hughes, Thomas; Viaene, Sebastien; Bizzocchi, Luca; Clemens, Marcel

    2015-01-01

    Aims: We present three independent catalogs of point-sources extracted from SPIRE images at 250, 350, and 500 μm, acquired with the Herschel Space Observatory as a part of the Herschel Virgo Cluster Survey (HeViCS). The catalogs have been cross-correlated to consistently extract the photometry at SPIRE wavelengths for each object. Methods: Sources have been detected using an iterative loop. The source positions are determined by estimating the likelihood to be a real source for each peak on the maps, according to the criterion defined in the sourceExtractorSussextractor task. The flux densities are estimated using the sourceExtractorTimeline, a timeline-based point source fitter that also determines the fitting procedure with the width of the Gaussian that best reproduces the source considered. Afterwards, each source is subtracted from the maps, removing a Gaussian function in every position with the full width half maximum equal to that estimated in sourceExtractorTimeline. This procedure improves the robustness of our algorithm in terms of source identification. We calculate the completeness and the flux accuracy by injecting artificial sources in the timeline and estimate the reliability of the catalog using a permutation method. Results: The HeViCS catalogs contain about 52 000, 42 200, and 18 700 sources selected at 250, 350, and 500 μm above 3σ and are ~75%, 62%, and 50% complete at flux densities of 20 mJy at 250, 350, 500 μm, respectively. We then measured source number counts at 250, 350, and 500 μm and compare them with previous data and semi-analytical models. We also cross-correlated the catalogs with the Sloan Digital Sky Survey to investigate the redshift distribution of the nearby sources. From this cross-correlation, we select ~2000 sources with reliable fluxes and a high signal-to-noise ratio, finding an average redshift z ~ 0.3 ± 0.22 and 0.25 (16-84 percentile). Conclusions: The number counts at 250, 350, and 500 μm show an increase in

  10. The HST/ACS Coma Cluster Survey. II. Data Description and Source Catalogs

    NASA Technical Reports Server (NTRS)

    Hammer, Derek; Kleijn, Gijs Verdoes; Hoyos, Carlos; Den Brok, Mark; Balcells, Marc; Ferguson, Henry C.; Goudfrooij, Paul; Carter, David; Guzman, Rafael; Peletier, Reynier F.; Smith, Russell J.; Graham, Alister W.; Trentham, Neil; Peng, Eric; Puzia, Thomas H.; Lucey, John R.; Jogee, Shardha; Aguerri, Alfonso L.; Batcheldor, Dan; Bridges, Terry J.; Davies, Jonathan I.; Del Burgo, Carlos; Erwin, Peter; Hornschemeier, Ann; Hudson, Michael J.

    2010-01-01

    The Coma cluster, Abell 1656, was the target of a HST-ACS Treasury program designed for deep imaging in the F475W and F814W passbands. Although our survey was interrupted by the ACS instrument failure in early 2007, the partially-completed survey still covers approximately 50% of the core high density region in Coma. Observations were performed for twenty-five fields with a total coverage area of 274 aremin(sup 2), and extend over a wide range of cluster-centric radii (approximately 1.75 Mpe or 1 deg). The majority of the fields are located near the core region of Coma (19/25 pointings) with six additional fields in the south-west region of the cluster. In this paper we present SEXTRACTOR source catalogs generated from the processed images, including a detailed description of the methodology used for object detection and photometry, the subtraction of bright galaxies to measure faint underlying objects, and the use of simulations to assess the photometric accuracy and completeness of our catalogs. We also use simulations to perform aperture corrections for the SEXTRACTOR Kron magnitudes based only on the measured source flux and its half-light radius. We have performed photometry for 76,000 objects that consist of roughly equal numbers of extended galaxies and unresolved objects. Approximately two-thirds of all detections are brighter than F814W=26.5 mag (AB), which corresponds to the 10sigma, point-source detection limit. We estimate that Coma members are 5-10% of the source detections, including a large population of compact objects (primarily GCs, but also cEs and UCDs), and a wide variety of extended galaxies from cD galaxies to dwarf low surface brightness galaxies. The initial data release for the HST-ACS Coma Treasury program was made available to the public in August 2008. The images and catalogs described in this study relate to our second data release.

  11. VizieR Online Data Catalog: Jellyfish galaxy candidates in galaxy clusters (Poggianti+, 2016)

    NASA Astrophysics Data System (ADS)

    Poggianti, B. M.; Fasano, G.; Omizzolo, A.; Gullieuszik, M.; Bettoni, D.; Moretti, A.; Paccagnella, A.; Jaffe, Y. L.; Vulcani, B.; Fritz, J.; Couch, W.; D'Onofrio, M.

    2016-10-01

    WIde-field Nearby Galaxy-cluster Survey (WINGS) is a large survey targeting 76 clusters of galaxies selected on the basis of their X-ray luminosity (Ebeling et al. 1996, Cat. J/MNRAS/281/799; Ebeling et al. 1998, Cat. J/MNRAS/301/881; Ebeling et al. 2000, Cat. J/MNRAS/318/333), covering a wide range in cluster masses (σ=500-1200+km/s, logLX=43.3-45erg/s, Fasano et al. 2006A&A...445..805F). The original WINGS data set consisted of B and V deep photometry of a 34'*34' field of view with the WFC@INT and the WFC@2.2mMPG/ESO (Varela et al. 2009, Cat. J/A+A/497/667), spectroscopic follow-ups with 2dF@AAT and WYFFOS@WHT (Cava et al. 2009, Cat. J/A+A/495/707), plus J and K imaging with WFC@UKIRT (Valentinuzzi et al. 2009, Cat. J/A+A/501/851) and some U-band imaging (Omizzolo et al. 2014, Cat. J/A+A/561/A111). This database is presented in Moretti et al. 2014A&A...564A.138M and has been employed for a number of studies (see https://sites.google.com/site/wingsomegawings/). OmegaCAM-VST observations of WINGS galaxy clusters (OMEGAWINGS) is a recent extention of this project, that quadruples the area covered (1deg2) and allows to reach up to ~2.5 cluster virial radii. OMEGAWINGS is based on two OmegaCAM@VST GTO programs for 46 WINGS clusters: a B and V campaign completed in P93, and an ongoing u-band programme. The B and V data, the data reduction and the photometric catalogs are presented in Gullieuszik et al. 2015 (Cat. J/A+A/581/A41). Spectra are obtained with AAOmega@AAT on the OmegaCAM field. So far, we have secured high quality spectra for ~30 OMEGAWINGS clusters, reaching very high spectroscopic completeness levels for galaxies brighter than V=20 from the cluster cores to their periphery (A. Moretti et al. 2016, in preparation). Galaxies are considered cluster members if they are within 3σ from the cluster redshift. The mean redshift uncertainty, computed from the differences between WINGS and OMEGAWINGS redshift values of repeated objects, is Δz=0.0002. For this

  12. Toward An Understanding of Cluster Evolution: A Deep X-Ray Selected Cluster Catalog from ROSAT

    NASA Technical Reports Server (NTRS)

    Jones, Christine; Oliversen, Ronald (Technical Monitor)

    2002-01-01

    In the past year, we have focussed on studying individual clusters found in this sample with Chandra, as well as using Chandra to measure the luminosity-temperature relation for a sample of distant clusters identified through the ROSAT study, and finally we are continuing our study of fossil groups. For the luminosity-temperature study, we compared a sample of nearby clusters with a sample of distant clusters and, for the first time, measured a significant change in the relation as a function of redshift (Vikhlinin et al. in final preparation for submission to Cape). We also used our ROSAT analysis to select and propose for Chandra observations of individual clusters. We are now analyzing the Chandra observations of the distant cluster A520, which appears to have undergone a recent merger. Finally, we have completed the analysis of the fossil groups identified in ROM observations. In the past few months, we have derived X-ray fluxes and luminosities as well as X-ray extents for an initial sample of 89 objects. Based on the X-ray extents and the lack of bright galaxies, we have identified 16 fossil groups. We are comparing their X-ray and optical properties with those of optically rich groups. A paper is being readied for submission (Jones, Forman, and Vikhlinin in preparation).

  13. Dumb-bell galaxies in southern clusters: Catalog and preliminary statistical results

    NASA Technical Reports Server (NTRS)

    Vettolani, G.; Gregorini, L.; Parma, P.; Deruiter, H. R.

    1990-01-01

    The dominant galaxy of a rich cluster is often an object whose formation and evolution is closely connected to the dynamics of the cluster itself. Hoessel (1980) and Schneider et al. (1983) estimate that 50 percent of the dominant galaxies are either of the dumb-bell type or have companions at projected distances less than 20 kpc, which is far in excess of the number expected from chance projection (see also Rood and Leir 1979). Presently there is no complete sample of these objects, with the exception of the listing of dumb-bell galaxies in BM type I and I-II clusters in the Abell statistical sample of Rood and Leir (1979). Recent dynamical studies of dumb-bell galaxies in clusters (Valentijn and Casertano, 1988) still suffer from inhomogeneity of the sample. The fact that it is a mixture of optically and radio selected objects may have introduced an unknown biases, for instance if the probability of radio emission is enhanced by the presence of close companions (Stocke, 1978, Heckman et al. 1985, Vettolani and Gregorini 1988) a bias could be present in their velocity distribution. However, this situation is bound to improve: a new sample of Abell clusters in the Southern Hemisphere has been constructed (Abell et al., 1988 hereafter ACO), which has several advantages over the original northern catalog. The plate material (IIIaJ plates) is of better quality and reaches fainter magnitudes. This makes it possible to classify the cluster types with a higher degree of accuracy, as well as to fainter magnitudes. The authors therefore decided to reconsider the whole problem constructing a new sample of dumb-bell galaxies homogeneously selected from the ACO survey. Details of the classification criteria are given.

  14. Precise Calibration of the Virial Theorem from Hubble Volume Cluster Catalogs

    NASA Astrophysics Data System (ADS)

    Evrard, A. E.; Horikawa, T.; Virgo Consortium Collaboration

    2000-10-01

    The Hubble Volume project of the Virgo Consortium has created 109 particle N-body simulations of large-scale structure formation in ΛCDM and τCDM cosmologies with resolution sufficient to define a virtual Coma cluster with 500 particles. Light-cone survey output from the simulations provide synthetic sky surveys of the dark matter distribution in very large cosmic volumes, ~ 1010 h-3 Mpc3. Cluster catalogs derived from the surveys contain 100,000 to 500,000 clusters with masses exceeding 5 x 1013 h-1 Msun and redshifts extending to z ~ 2. We analyse in detail the virial relation between dark matter mass MΔ c and velocity dispersion σ . We find a unified calibration of the relation in the form H(z) MΔ c = A σ p for which the amplitude A and slope p are independent of cosmology and/or epoch (H(z) is the Hubble parameter at redshift z). This holds for clusters whose properties are defined within a spherical region encompassing a fixed density contrast Δ c (typically 200) with respect to the critical density. Other definitions of clusters require a redshift dependent amplitude A(z). The scatter in σ at fixed H(z) M about the mean relation is small ( ~ 6%) and positively skewed. Subdividing the population into two classes --- `parents' and `children' --- we identify the minority child component as the source of the skewness and infer that the children are merger debris that has not yet been fully incorporated into the parent population. For the parents alone, the probability distribution function of the velocity dispersion residuals is very well modeled by a Gaussian distribution, suggesting a central limit theorem interpretation. The accuracy of the calibration will be addressed by examining Virgo simulations with higher mass resolution and smaller volumes. Connections to obervable measures --- cluster X-ray temperature and galaxy velocity dispersion --- will be briefly discussed.

  15. VizieR Online Data Catalog: Dynamical parameters of open clusters (Danilov+, 2012)

    NASA Astrophysics Data System (ADS)

    Danilov, V. M.; Putkov, S. I.

    2012-11-01

    α0 - is the mean value of a virial factor, δ{alp the amplitude of virial factor oscillations, ν={rho}c/{rho}0-is the density contrast ({rho}c - is the mean density of a cluster core, {rho}0 - is the cluster centre density), NK/N - is the ratio of the stars number in a cluster received by King's distribution and by stellar counts, P1-is the period of cluster core oscillations, P2 - is the period of cluster oscillations, δR1/R10-is the relative amplitude of core radius oscillations, λ=σ/σiz, σiz2 - is the velocity dispersion of an isolated virialized cluster, σ2, σ12, σ22 - are the velocity dispersions of nonisolated nonsteady clusters with spherical halo; with ellipsoidal halo elongated to the centre of Galaxy; with ellipsoidal halo elongated to the direction of cluster motion correspondingly. Errors of values α0, δα, δR1/R10, P1 have been estimated by the assumption of the normal distribution of the values M (the mass of a cluster), R2 (the radius of a cluster), {xi} (the ratio of core radius to halo radius), μ (the ratio of core mass to halo mass). Assuming a deviation of one of the four values equal to zero we receive four sections of 1σ-errors ellipsoid. These sections are the spheres of radius 20.5. Taking points on each sphere with the step 0.25*π on angular coordinates we receive 96 points on a surface of the 1σ-errors ellipsoid. The values α0, δα, δR1/R10, P1 were calculated in the 96 points. The centre of the ellipsoidal was used for calculation of the mean values. The errors of the values were computed as root-mean-squire deviations of 96 values from the same mean values. The errors of the others values of the catalog were computed by the errors calculation rule of indirect measuring. (3 data files).

  16. A MULTI-COLOR OPTICAL SURVEY OF THE ORION NEBULA CLUSTER. I. THE CATALOG

    SciTech Connect

    Da Rio, N.; Robberto, M.; Soderblom, D. R.; Panagia, N.; Hillenbrand, L. A.; Palla, F.; Stassun, K.

    2009-08-01

    We present U, B, V, I broadband, 6200 A TiO mediumband, and H{alpha} narrowband photometry of the Orion Nebula Cluster (ONC) obtained with the WFI imager at the ESO/MPI 2.2 telescope at La Silla Observatory. The nearly simultaneous observations cover the entire ONC in a field of about 34 x 34 arcmin. They enable us to determine stellar colors avoiding the additional scatter in the photometry induced by stellar variability typical of pre-main-sequence stars. We identify 2612 point-like sources in the I band; 58%, 43%, and 17% of them are also detected in V, B, and U, respectively. 1040 sources are identified in the H{alpha} band. In this paper we present the observations, the calibration techniques adopted, and the resulting catalog. We show the derived color-magnitude diagram of the population and discuss the completeness of our photometry. We define a spectrophotometric TiO index that takes into account the fluxes in the V, I, and TiO bands. Comparing it with spectral types of ONC members in the literature, we find a correlation between the index and the spectral type valid for M-type stars, which is accurate to better than 1 spectral subclass for M3-M6 types and better than 2 spectral subclasses for M0-M2 types.. This allows us to newly classify 217 stars. In a similar way, we subtract from our H{alpha} photometry the photospheric continuum at its wavelength, deriving calibrated line excess for the full sample. This represents the largest H{alpha} star catalog obtained to date on the ONC. This data set enables a full re-analysis of the properties of the pre-main-sequence population in the Orion Nebula Cluster to be presented in an accompanying paper.

  17. A Multi-color Optical Survey of the Orion Nebula Cluster. I. The Catalog

    NASA Astrophysics Data System (ADS)

    Da Rio, N.; Robberto, M.; Soderblom, D. R.; Panagia, N.; Hillenbrand, L. A.; Palla, F.; Stassun, K.

    2009-08-01

    We present U, B, V, I broadband, 6200 Å TiO mediumband, and Hα narrowband photometry of the Orion Nebula Cluster (ONC) obtained with the WFI imager at the ESO/MPI 2.2 telescope at La Silla Observatory. The nearly simultaneous observations cover the entire ONC in a field of about 34 × 34 arcmin. They enable us to determine stellar colors avoiding the additional scatter in the photometry induced by stellar variability typical of pre-main-sequence stars. We identify 2612 point-like sources in the I band; 58%, 43%, and 17% of them are also detected in V, B, and U, respectively. 1040 sources are identified in the Hα band. In this paper we present the observations, the calibration techniques adopted, and the resulting catalog. We show the derived color-magnitude diagram of the population and discuss the completeness of our photometry. We define a spectrophotometric TiO index that takes into account the fluxes in the V, I, and TiO bands. Comparing it with spectral types of ONC members in the literature, we find a correlation between the index and the spectral type valid for M-type stars, which is accurate to better than 1 spectral subclass for M3-M6 types and better than 2 spectral subclasses for M0-M2 types.. This allows us to newly classify 217 stars. In a similar way, we subtract from our Hα photometry the photospheric continuum at its wavelength, deriving calibrated line excess for the full sample. This represents the largest Hα star catalog obtained to date on the ONC. This data set enables a full re-analysis of the properties of the pre-main-sequence population in the Orion Nebula Cluster to be presented in an accompanying paper.

  18. VizieR Online Data Catalog: Candidate galaxy clusters in KiDS-DR2 (Radovich+, 2017)

    NASA Astrophysics Data System (ADS)

    Radovich, M.; Puddu, E.; Bellagamba, F.; Roncarelli, M.; Moscardini, L.; Bardelli, S.; Grado, A.; Getman, F.; Maturi, M.; Huang, Z.; Napolitano, N.; McFarland, J.; Valentijn, E.; Bilicki, M.

    2016-11-01

    We present a catalog of 1543 candidate galaxy clusters found in the DR2 release of the Kilo-Degree Survey (KiDS), covering an area of 114 sq. degrees, in the redshift range 0<=z<=0.7. Based on simulated data, we derived a completeness ~85% and a purity of at least 80%. The catalog also includes the position and magnitude of the galaxy identified as the BCG; an estimate of the cluster masses, which were computed using the number of candidate cluster member galaxies as a proxy. Due to the limited area available in KiDS DR2, the calibration of the richness-mass relation is still preliminary, and will be improved in the next releases. (1 data file).

  19. VizieR Online Data Catalog: HKs photometry in the Arches cluster (Espinoza+, 2009)

    NASA Astrophysics Data System (ADS)

    Espinoza, P.; Selman, F. J.; Melnick, J.

    2009-06-01

    The NAOS-CONICA data (ESO Program ID 073.D-0815) were obtained under clear weather conditions with subarcsecond seeing. The detector was an Aladdin 1024x1024 pixel InSb array and the camera had a plate scale of 27.15[mas/pix], giving us a 27x27arcsec2^ field of view of the Arches cluster. Total integration times were 1000, 400 and 720[s] in J, H, and Ks respectively, with the telescope moving alternatively to sky positions for a proper background subtraction. To optimize the Adaptive Optics (AO) performance we used the N90C10 dichroic, i.e. 90% of the light was directed to the infrared wavefront sensor. The Strehl ratio of our observations exceeded 27% in Ks, and reached more modest values of 5% in J, and 11% in the H band. Tables 2 and 3 present the DAOPHOT photometry of 427 HKS and 126 JHKS stars in the innermost 10 arcseconds of the Arches cluster. Table 3 is considerably shorter due to the increasing extinction towards bluer wavelengths. Table 5 presents the catalog with all the observed data and physical parameters derived from the Bayesian method and using the Color-magnitude stereogram. (3 data files).

  20. Identifying active faults in Switzerland using relocated earthquake catalogs and optimal anisotropic dynamic clustering

    NASA Astrophysics Data System (ADS)

    Wagner, M.; Wang, Y.; Husen, S.; Woessner, J.; Kissling, E. H.; Ouillon, G.; Giardini, D.; Sornette, D.

    2010-12-01

    Active fault zones are the causal locations of most earthquakes, which release tectonic stresses. Yet, identification and association of faults and earthquakes is not straightforward. On the one hand, many earthquakes occur on faults that are unknown. On the other hand, systematic biases and uncertainties in earthquake locations hamper the association of earthquakes and known faults. We tackle the problem of linking earthquakes to faults by relocating them in a non-linear probabilistic manner and by applying a three-dimensional optimal anisotropic dynamic clustering approach to the relocated events to map fault networks. Non-linear probabilistic earthquake location allows to compute probability density functions that provide the complete probabilistic solution to the earthquake hypocenter location problem, including improved information on location uncertainties. To improve absolute earthquake locations we use a newly developed combined controlled-source seismology and local earthquake tomography model, which allows the use of secondary phases, such as PmP. Dynamic clustering is a very general image processing technique that allows partitioning a set of data points. Our improved optimal anisotropic dynamic clustering technique accounts for uncertainties in earthquake locations by the use of probability density functions, as provided by non-linear probabilistic earthquake location. Hence, number and size of the reconstructed faults is controlled by earthquake location uncertainty. We apply our approach to seismicity in Switzerland to identify active faults in the region. Relocated earthquake catalogs and associated fault networks will be compared to already existing information on faults, such as geological and seismotectonic maps, to derive a more complete picture of active faulting in Switzerland.

  1. HUBBLE SPACE TELESCOPE PROPER MOTION (HSTPROMO) CATALOGS OF GALACTIC GLOBULAR CLUSTERS. I. SAMPLE SELECTION, DATA REDUCTION, AND NGC 7078 RESULTS

    SciTech Connect

    Bellini, A.; Anderson, J.; Van der Marel, R. P.; Watkins, L. L.; King, I. R.; Bianchini, P.; Chanamé, J.; Chandar, R.; Cool, A. M.; Ferraro, F. R.; Massari, D.; Ford, H.

    2014-12-20

    We present the first study of high-precision internal proper motions (PMs) in a large sample of globular clusters, based on Hubble Space Telescope (HST) data obtained over the past decade with the ACS/WFC, ACS/HRC, and WFC3/UVIS instruments. We determine PMs for over 1.3 million stars in the central regions of 22 clusters, with a median number of ∼60,000 stars per cluster. These PMs have the potential to significantly advance our understanding of the internal kinematics of globular clusters by extending past line-of-sight (LOS) velocity measurements to two- or three-dimensional velocities, lower stellar masses, and larger sample sizes. We describe the reduction pipeline that we developed to derive homogeneous PMs from the very heterogeneous archival data. We demonstrate the quality of the measurements through extensive Monte Carlo simulations. We also discuss the PM errors introduced by various systematic effects and the techniques that we have developed to correct or remove them to the extent possible. We provide in electronic form the catalog for NGC 7078 (M 15), which consists of 77,837 stars in the central 2.'4. We validate the catalog by comparison with existing PM measurements and LOS velocities and use it to study the dependence of the velocity dispersion on radius, stellar magnitude (or mass) along the main sequence, and direction in the plane of the sky (radial or tangential). Subsequent papers in this series will explore a range of applications in globular-cluster science and will also present the PM catalogs for the other sample clusters.

  2. Messier Catalog

    NASA Astrophysics Data System (ADS)

    Murdin, P.

    2000-11-01

    In the eighteenth century the French astronomer, Charles Messier (1730-1817), drew up a catalog of 109 of the brighter nebulae, clusters and galaxies. Objects in this catalog are denoted by the letter M followed by a number, for example, M31 is the Andromeda Galaxy. Messier's prime interest was comets. His purpose was to make comet hunting easier by tabulating permanent deep-sky objects that coul...

  3. VizieR Online Data Catalog: Slug analysis of star clusters in NGC 628 & 7793 (Krumholz+, 2015)

    NASA Astrophysics Data System (ADS)

    Krumholz, M. R.; Adamo, A.; Fumagalli, M.; Wofford, A.; Calzetti, D.; Lee, J. C.; Whitmore, B. C.; Bright, S. N.; Grasha, K.; Gouliermis, D. A.; Kim, H.; Nair, P.; Ryon, J. E.; Smith, L. J.; Thilker, D.; Ubeda, L.; Zackrisson, E.

    2016-02-01

    In this paper we use slug, the Stochastically Lighting Up Galaxies code (da Silva et al. 2012ApJ...745..145D, 2014MNRAS.444.3275D; Krumholz et al. 2015MNRAS.452.1447K), and its post-processing tool for analysis of star cluster properties, cluster_slug, to analyze an initial sample of clusters from the LEGUS (Calzetti et al. 2015AJ....149...51C). A description of the steps required to produce final cluster catalogs of the Legacy Extragalactic UV Survey (LEGUS) targets can be found in Calzetti et al. (2015AJ....149...51C), and in A. Adamo et al. (2015, in preparation). LEGUS is an HST Cycle 21 Treasury program that is imaging 50 nearby galaxies in five broadbands with the WFC3/UVIS, from the NUV to the I band. (1 data file).

  4. AN OPTICAL CATALOG OF GALAXY CLUSTERS OBTAINED FROM AN ADAPTIVE MATCHED FILTER FINDER APPLIED TO SLOAN DIGITAL SKY SURVEY DATA RELEASE 6

    SciTech Connect

    Szabo, T.; Pierpaoli, E.; Pipino, A.; Dong, F.; Gunn, J. E-mail: pierpaol@usc.edu

    2011-07-20

    We present a new cluster catalog extracted from the Sloan Digital Sky Survey Data Release 6 (SDSS DR6) using an adaptive matched filter (AMF) cluster finder. We identify 69,173 galaxy clusters in the redshift range 0.045 {<=} z < 0.78 in 8420 deg{sup 2} of the sky. We provide angular position, redshift, richness, core, and virial radii estimates for these clusters, as well as an error analysis for each of these quantities. We also provide a catalog of more than 205,000 galaxies representing the three brightest galaxies in the r band which are possible brightest cluster galaxy (BCG) candidates. We show basic properties of the BCG candidates and study how their luminosity scales in redshift and cluster richness. We compare our catalog with the maxBCG and GMBCG catalogs, as well as with that of Wen et al. We match between 30% and 50% of clusters between catalogs over all overlapping redshift ranges. We find that the percentage of matches increases with the richness for all catalogs. We cross match the AMF catalog with available X-ray data in the same area of the sky and find 539 matches, 119 of which with temperature measurements. We present scaling relations between optical and X-ray properties and cluster center comparison. We find that both {Lambda}{sub 200} and R{sub 200} correlate well with both L{sub X} and T{sub X} , with no significant difference in trend if we restrict the matches to flux-limited X-ray samples.

  5. Distant Cluster Hunting. II; A Comparison of X-Ray and Optical Cluster Detection Techniques and Catalogs from the ROSAT Optical X-Ray Survey

    NASA Technical Reports Server (NTRS)

    Donahue, Megan; Scharf, Caleb A.; Mack, Jennifer; Lee, Y. Paul; Postman, Marc; Rosait, Piero; Dickinson, Mark; Voit, G. Mark; Stocke, John T.

    2002-01-01

    We present and analyze the optical and X-ray catalogs of moderate-redshift cluster candidates from the ROSA TOptical X-Ray Survey, or ROXS. The survey covers the sky area contained in the fields of view of 23 deep archival ROSA T PSPC pointings, 4.8 square degrees. The cross-correlated cluster catalogs were con- structed by comparing two independent catalogs extracted from the optical and X-ray bandpasses, using a matched-filter technique for the optical data and a wavelet technique for the X-ray data. We cross-identified cluster candidates in each catalog. As reported in Paper 1, the matched-filter technique found optical counter- parts for at least 60% (26 out of 43) of the X-ray cluster candidates; the estimated redshifts from the matched filter algorithm agree with at least 7 of 1 1 spectroscopic confirmations (Az 5 0.10). The matched filter technique. with an imaging sensitivity of ml N 23, identified approximately 3 times the number of candidates (155 candidates, 142 with a detection confidence >3 u) found in the X-ray survey of nearly the same area. There are 57 X-ray candidates, 43 of which are unobscured by scattered light or bright stars in the optical images. Twenty-six of these have fairly secure optical counterparts. We find that the matched filter algorithm, when applied to images with galaxy flux sensitivities of mI N 23, is fairly well-matched to discovering z 5 1 clusters detected by wavelets in ROSAT PSPC exposures of 8000-60,000 s. The difference in the spurious fractions between the optical and X-ray (30%) and IO%, respectively) cannot account for the difference in source number. In Paper I, we compared the optical and X-ray cluster luminosity functions and we found that the luminosity functions are consistent if the relationship between X-ray and optical luminosities is steep (Lx o( L&f). Here, in Paper 11, we present the cluster catalogs and a numerical simulation of the ROXS. We also present color-magnitude plots for several of the cluster

  6. VizieR Online Data Catalog: Hectospec survey of SZ clusters (HeCS-SZ) (Rines+, 2016)

    NASA Astrophysics Data System (ADS)

    Rines, K. J.; Geller, M. J.; Diaferio, A.; Hwang, H. S.

    2016-05-01

    HeCS-SZ is an extension of the HeCS survey to include clusters that enable the construction of an SZ-limited sample. We measured 7721 new redshifts with MMT/Hectospec in 21 clusters selected from the Planck SZ catalog (2014A&A...571A..20P; arXiv:1502.01597). We combine these new measurements with the existing HeCS (Hectospec Cluster Survey; Rines et al. 2013, J/ApJ/767/15) and CIRS (Cluster Infall Regions in SDSS project; Rines & Diaferio 2006, J/AJ/132/1275) surveys and with data from the literature to construct a total sample of 123 clusters. We use SDSS photometry for all clusters. The HeCS is a spectroscopic survey of 58 galaxy clusters at moderate redshift (z=0.1-0.3) with MMT/Hectospec. HeCS includes all clusters with ROSAT X-ray fluxes of f_X>5x10-12erg/s at [0.5-2.0]keV from the Bright Cluster Survey (BCS; Ebeling et al. 1998, J/MNRAS/301/881) or REFLEX survey (Bohringer et al. 2004, J/A+A/425/367) with optical imaging in the sixth Data Release (DR6) of SDSS (Adelman-McCarthy et al. 2008, II/282; superseded by II/294). CIRS used spectroscopy from the fourth Data Release of SDSS. Table 3 lists 168 redshifts measured with the FAST instrument on the 1.5m Tillinghast telescope at the Fred Lawrence Whipple Observatory. The additional single-slit spectra from FAST reduce the incompleteness of bright (SDSS r<~16.5) galaxies in the HeCS-SZ clusters. (4 data files).

  7. VizieR Online Data Catalog: LAMOST survey of star clusters in M31. II. (Chen+, 2016)

    NASA Astrophysics Data System (ADS)

    Chen, B.; Liu, X.; Xiang, M.; Yuan, H.; Huang, Y.; Shi, J.; Fan, Z.; Huo, Z.; Wang, C.; Ren, J.; Tian, Z.; Zhang, H.; Liu, G.; Cao, Z.; Zhang, Y.; Hou, Y.; Wang, Y.

    2016-09-01

    We select a sample of 306 massive star clusters observed with the Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST) in the vicinity fields of M31 and M33. Massive clusters in our sample are all selected from the catalog presented in Paper I (Chen et al. 2015, Cat. J/other/RAA/15.1392), including five newly discovered clusters selected with the SDSS photometry, three newly confirmed, and 298 previously known clusters from Revised Bologna Catalogue (RBC; Galleti et al. 2012, Cat. V/143; http://www.bo.astro.it/M31/). Since then another two objects, B341 and B207, have also been observed with LAMOST, and they are included in the current analysis. The current sample does not include those listed in Paper I but is selected from Johnson et al. 2012 (Cat. J/ApJ/752/95) since most of them are young but not so massive. All objects are observed with LAMOST between 2011 September and 2014 June. Table1 lists the name, position, and radial velocity of all sample clusters analyzed in the current work. The LAMOST spectra cover the wavelength range 3700-9000Å at a resolving power of R~1800. Details about the observations and data reduction can be found in Paper I. The median signal-to-noise ratio (S/N) per pixel at 4750 and 7450Å of spectra of all clusters in the current sample are, respectively, 14 and 37. Essentially all spectra have S/N(4750Å)>5 except for the spectra of 18 clusters. The latter have S/N(7540Å)>10. Peacock et al. 2010 (Cat. J/MNRAS/402/803) retrieved images of M31 star clusters and candidates from the SDSS archive and extracted ugriz aperture photometric magnitudes from those objects using the SExtractor. They present a catalog containing homogeneous ugriz photometry of 572 star clusters and 373 candidates. Among them, 299 clusters are in our sample. (2 data files).

  8. VizieR Online Data Catalog: Young and embedded clusters in Cygnus-X (Maia+, 2016)

    NASA Astrophysics Data System (ADS)

    Maia, F. F. S.; Moraux, E.; Joncour, I.

    2016-02-01

    CFHT/WIRCam was used to acquire deep (960s, 1200s, 480s) JHK exposures of five fields covering ~1 degree squared in the Cygnus-X complex, in six nights between 04/09/2012 and 29/10/2012. The frames were detrended and coadded into a master mosaic where PSF photometry was carried out using SExtractor and PSFex software using a 2-sigma detection threshold. The resulting catalog was calibrated against the 2MASS catalog, but no transformation was done to our data. Instead, bright sources (brighter than the saturation magnitude) were recovered from 2MASS and calibrated to the WIRCam instrumental system to complement our catalog. The final table contains about 310000 stars spanning 12 magnitudes and reaching K=18.5 at 95% completeness. The fundamental parameters of 10 young stellar systems in the region were derived through this final catalogue. (2 data files).

  9. The EMSS catalog of X-ray-selected clusters of galaxies. 1: An atlas of CCD images of 41 distant clusters

    NASA Technical Reports Server (NTRS)

    Gioia, I. M.; Luppino, G. A.

    1994-01-01

    An atlas of deep, wide-field R-band charge coupled device (CCD) images of a complete sample of distant, X-ray-selected clusters of galaxies is presented. These clusters are the 41 most distant (z is greater than or equal to 0.15) and most X-ray-luminous (L(sub x) is greater than or equal to 2 x 10(exp 44) ergs/s) clusters in the Einstein Observatory Extended Medium Sensitivity Survey (EMSS) catalog that are observable from Mauna Kea (delta is greater than -40 deg). The sample spans a redshift range of 0.15 is less than or equal to z is less than or equal to 0.81 and includes at least two and possibly as many as six rich clusters with z is greater than 0.5. For the most part, the data are of superior quality, with a median seeing of 0.8 sec full width half-maximum (FWHM) and coverage of at least 1 Mpc x 1 Mpc in the cluster frame (H(sub 0) = 50; q(sub 0) = 1/2). In addition, we update the available optical, X-ray, and radio data on the entire EMSS sample of 104 clusters. We outline the cluster selection criteria in detail and emphasize that X-ray-selected cluster samples may prove to be more useful for cosmological studies than optically selected samples. The EMSS cluster sample in particular can be exploited for diverse cosmological investigations, as demonstrated by the detection of evolution in the X-ray luminosity function previously reported, and more recently by the discovery of a large number of gravitationally lensed images in these clusters.

  10. The XMM-BCS galaxy cluster survey: I. The X-ray selected cluster catalog from the initial 6 deg$^2$

    SciTech Connect

    Suhada, R.; Song, J.; Bohringer, H.; Mohr, J.J.; Chon, G.; Finoguenov, A.; Fassbender, R.; Desai, S.; Armstrong, R.; Zenteno, A.; Barkhouse, W.A.; /North Dakota U. /Paris, Inst. Astrophys.

    2011-11-01

    The XMM-Newton - Blanco Cosmology Survey project (XMM-BCS) is a coordinated X-ray, optical and mid-infrared cluster survey in a field also covered by Sunyaev-Zel dovich effect (SZE) surveys by the South Pole Telescope and the Atacama Cosmology Telescope. The aim of the project is to study the cluster population in a 14 deg{sup 2} field (center: {alpha} {approx} 23:29:18.4, {delta} {approx} -54:40:33.6). The uniform multi-wavelength coverage will also allow us for the first time to comprehensively compare the selection function of the different cluster detection approaches in a single test field and perform a cross-calibration of cluster scaling relations. In this work, we present a catalog of 46 X-ray selected clusters from the initial 6 deg{sup 2} survey core.We describe the XMM-BCS source detection pipeline and derive physical properties of the clusters. We provide photometric redshift estimates derived from the BCS imaging data and spectroscopic redshift measurements for a low redshift subset of the clusters. The photometric redshift estimates are found to be unbiased and in good agreement with the spectroscopic values. Our multi-wavelength approach gives us a comprehensive look at the cluster and group population up to redshifts z {approx} 1. The median redshift of the sample is 0.47 and the median mass M{sub 500} {approx} 1 x 10{sup 14} M{sub {circle_dot}} ({approx} 2 keV). From the sample, we derive the cluster log N - log S using an approximation to the survey selection function and find it in good agreement with previous studies. We compare optical mass estimates from the Southern Cosmology Survey available for part of our cluster sample with our estimates derived from the X-ray luminosity. Weak lensing masses available for a subset of the cluster sample are in agreement with our estimates. Optical masses based on cluster richness and total optical luminosity are found to be significantly higher than the X-ray values. The present results illustrate the

  11. An updated survey of globular clusters in M 31. III. A spectroscopic metallicity scale for the Revised Bologna Catalog

    NASA Astrophysics Data System (ADS)

    Galleti, S.; Bellazzini, M.; Buzzoni, A.; Federici, L.; Fusi Pecci, F.

    2009-12-01

    Aims. We present a new homogeneous set of metallicity estimates based on Lick indices for the old globular clusters of the M 31 galaxy. The final aim is to add homogeneous spectroscopic metallicities to as many entries as possible of the Revised Bologna Catalog of M 31 clusters, by reporting Lick index measurements from any source (literature, new observations, etc.) on the same scale. Methods: New empirical relations of [Fe/H] as a function of [MgFe] and Mg2 indices are based on the well-studied galactic globular clusters, complemented with theoretical model predictions for -0.2≤ [Fe/H]≤ +0.5. Lick indices for M 31 clusters from various literature sources (225 clusters) and from new observations by our team (71 clusters) have been transformed into the Trager et al. system, yielding new metallicity estimates for 245 globular clusters of M 31. Results: Our values are in good agreement with recent estimates based on detailed spectral fitting and with those obtained from color magnitude diagrams of clusters imaged with the Hubble Space Telescope. The typical uncertainty on individual estimates is ≃±0.25 dex, as resulted from the comparison with metallicities derived from color magnitude diagrams of individual clusters. Conclusions: The metallicity distribution of M 31 globular cluster is briefly discussed and compared with that of the Milky Way. Simple parametric statistical tests suggest that the distribution is probably not unimodal. The strong correlation between metallicity and kinematics found in previous studies is confirmed. The most metal-rich GCs tend to be packed into the center of the system and to cluster tightly around the galactic rotation curve defined by the HI disk, while the velocity dispersion about the curve increases with decreasing metallicity. However, also the clusters with [Fe/H]<-1.0 display a clear rotation pattern, at odds with their Milky Way counterparts. Based on observations made at La Palma, at the Spanish Observatorio del Roque

  12. VizieR Online Data Catalog: XCS-DR1 Cluster Catalogue (Mehrtens+, 2012)

    NASA Astrophysics Data System (ADS)

    Mehrtens, N.; Romer, A. K.; Hilton, M.; Lloyd-Davies, E. J.; Miller, C. J.; Stanford, S. A.; Hosmer, M.; Hoyle, B.; Collins, C. A.; Liddle, A. R.; Viana, P. T. P.; Nichol, R. C.; Stott, J. P.; Dubois, E. N.; Kay, S. T.; Sahlen, M.; Young, O.; Short, C. J.; Christodoulou, L.; Watson, W. A.; Davidson, M.; Harrison, C. D.; Baruah, L.; Smith, M.; Burke, C.; Mayers, J. A.; Deadman, P.-J.; Rooney, P. J.; Edmondson, E. M.; West, M.; Campbell, H. C.; Edge, A. C.; Mann, R. G.; Sabirli, K.; Wake, D.; Benoist, C.; da Costa, L.; Maia, M. A. G.; Ogando, R.

    2013-04-01

    The XMM Cluster Survey (XCS) is a serendipitous search for galaxy clusters using all publicly available data in the XMM-Newton Science Archive. Its main aims are to measure cosmological parameters and trace the evolution of X-ray scaling relations. In this paper we present the first data release from the XMM Cluster Survey (XCS-DR1). This consists of 503 optically confirmed, serendipitously detected, X-ray clusters. Of these clusters, 256 are new to the literature and 357 are new X-ray discoveries. We present 463 clusters with a redshift estimate (0.06clusters with spectroscopic redshifts. The remainder have photometric redshifts. In addition, we have measured X-ray temperatures (TX) for 401 clusters (0.4

  13. VizieR Online Data Catalog: Hi-GAL cluster candidates physical properties (Beuret+, 2017)

    NASA Astrophysics Data System (ADS)

    Beuret, M.; Billot, N.; Cambresy, L.; Eden, D. J.; Elia, D.; Molinari, S.; Pezzuto, S.; Schisano, E.

    2016-11-01

    Physical properties for 1633 Hi-GAL cluster candidates in the inner part of the Galactic Plane are presented. The 1633 cluster candidates are splitted into two tables : 496 reliable cluster candidates and 1137 potential cluster candidates. For each of the 1633 cluster candidates central positions, angular minor and major axis, position angles of the ellipses, the total number of clumps and the ratio of number of pre-stellar clumps over proto-stellar clumps are given. Besides these properties, for each reliable cluster candidates heliocentric distances, galactocentric distances, scale heights, linear minor and major axis, surface densities and closest HII regions are given. For each potential cluster candidates angular surface density and a flag that determines their classifications as potential cluster candidates are given. (2 data files).

  14. VizieR Online Data Catalog: Metallicity estimates of M31 globular clusters (Galleti+, 2009)

    NASA Astrophysics Data System (ADS)

    Galleti, S.; Bellazzini, M.; Buzzoni, A.; Federici, L.; Fusi Pecci, F.

    2010-04-01

    New empirical relations of [Fe/H] as a function of [MgFe] and Mg2 indices are based on the well-studied galactic globular clusters, complemented with theoretical model predictions for -0.2<=[Fe/H]<=+0.5. Lick indices for M31 clusters from various literature sources (225 clusters) and from new observations by our team (71 clusters) have been transformed into the Trager et al. (2000AJ....119.1645T) system, yielding new metallicity estimates for 245 globular clusters of M31. (3 data files).

  15. VizieR Online Data Catalog: Gunn photometry of seven clusters of galaxies (Molinari+ 1996)

    NASA Astrophysics Data System (ADS)

    Molinari, E.; Buzzoni, A.; Chincarini, G.

    1996-04-01

    Gunn g, r, i photometry for the 7 clusters MRC0254-274, Cl0317+15, MS0418.3-3 844, Cl1141-283, A1689, A3594, S0781B is presented. For each cluster we derived the spatial distribution properties obtaining the core radius and the concentration parameters. Color properties of the cluster galaxy population are also briefly discussed. (7 data files).

  16. VizieR Online Data Catalog: Radial velocities of 76 M31 candidate clusters (Galleti+, 2006)

    NASA Astrophysics Data System (ADS)

    Galleti, S.; Federici, L.; Bellazzini, M.; Buzzoni, A.; Fusi Pecci, F.

    2006-06-01

    We present the first results of a large spectroscopic survey of globular clusters and candidate globular clusters in the nearby M31 galaxy. The survey is aimed at the classification of known candidate M31 clusters and at the study of their kinematic properties. We obtained low-resolution spectroscopy for 133 targets, including 76 yet-to-be-confirmed candidate clusters (i.e. with no previous spectroscopic information), 55 already-confirmed genuine M31 clusters, and 2 uncertain candidates. Our observations allowed a reliable estimate of the target radial velocity, within a typical accuracy of ~+/-20Km/s. The observed candidates have been robustly classified according to their radial velocity and shape parameters that allowed us to confidently discriminate between point sources and extended objects even from low-spatial-resolution imagery. In our set of 76 candidate clusters we found: 42 newly-confirmed bona-fide M31 clusters, 12 background galaxies, 17 foreground Galactic stars, 2 HII regions belonging to M31 and 3 unclassified (possibly M31 clusters or foreground stars) objects. The classification of a few other candidates not included in our survey has been also reassessed on various observational bases. All the sources of radial velocity estimates for M31 known globular clusters available in the literature have been compared and checked, and a homogeneous general list has been obtained for 349 confirmed clusters with radial velocity. Our results suggest that a significant number of genuine clusters (~>100) is still hidden among the plethora of known candidates proposed by various authors. Hence our knowledge of the globular cluster system of the M31 galaxy is still far from complete even in terms of simple membership. (1 data file).

  17. VizieR Online Data Catalog: OmegaWINGS local clusters of galaxies redshifts (Moretti+, 2017)

    NASA Astrophysics Data System (ADS)

    Moretti, A.; Gullieuszik, M.; Poggianti, B.; Paccagnella, A.; Couch, W. J.; Vulcani, B.; Bettoni, D.; Fritz, J.; Cava, A.; Fasaano, G.; D'Onofrio, M.; Omizzolo, A.

    2017-02-01

    Redshifts, magnitude/radial completeness, and memberships are given for the 17985 galaxies observed as part of the OmegaWINGS survey of local clusters of galaxies over 1 square degree. Redshifts have been measured using both absorption and emission lines features. The sample magnitude completeness is 80% at V=20. Thanks to the observing strategy, the radial completeness turned out to be relatively constant (90%) within the AAOmega field of view. The success rate in measuring redshifts is 95%, at all radii. Cluster members are flagged 1 or 2, depending on the cluster structure/secondary structure, and 0 if they are not cluster members. (1 data file).

  18. VizieR Online Data Catalog: SMC BV photometry of 9 star cluster fields (Dias+, 2016)

    NASA Astrophysics Data System (ADS)

    Dias, B.; Kerber, L.; Barbuy, B.; Bica, E.; Ortolani, S.

    2016-05-01

    Photometric magnitudes from SOAR Optical Imager for individual stars in nine stellar clusters in the Small Magellanic Cloud are presented. The following clusters are presented: Bruck2, Bruck4, Bruck6, HW5, HW6, Kron8, Kron11, Lindsay14, and NGC152. For each star equatorial coordinates and B, V (Bessel) magnitudes with their errors are given. (10 data files).

  19. VizieR Online Data Catalog: Galaxy clusters from the APM galaxy survey (Dalton+ 1997)

    NASA Astrophysics Data System (ADS)

    Dalton, G. B.; Maddox, S. J.; Sutherland, W. J.; Efstahiou, G.

    1997-10-01

    We describe the construction of catalogues of galaxy clusters from the APM Galaxy survey using an automated algorithm based on Abell-like selection criteria. We investigate the effects of varying several parameters in our selection algorithm, including the magnitude range and radius from the cluster centre used to estimate the cluster richnesses. We quantify the accuracy of the photometric distance estimates by comparing them with measured redshifts, and we investigate the stability and completeness of the resulting catalogues. We find that the angular correlation functions for different cluster catalogues are in good agreement with one another, and are also consistent with the observed amplitude of the spatial correlation function of rich clusters. (1 data file).

  20. VizieR Online Data Catalog: Follow-up study of gal. & AGNs in z>1 clusters (Alberts+, 2016)

    NASA Astrophysics Data System (ADS)

    Alberts, S.; Pope, A.; Brodwin, M.; Chung, S. M.; Cybulski, R.; Dey, A.; Eisenhardt, P. R. M.; Galametz, A.; Gonzalez, A. H.; Jannuzi, B. T.; Stanford, S. A.; Snyder, G. F.; Stern, D.; Zeimann, G. R.

    2016-08-01

    In this work, we concentrate our analysis on 11 spectroscopically confirmed clusters from the IRAC Shallow/Distant Cluster Survey (ISCS/IDCS) that we observed with Herschel/PACS at 100 and 160um, obtained during Open Time 2 observing (PID: OT2apope3) (summary of imaging in table 6 spanning from June 2012 to January 2013). Given the resolution of PACS (FWHM~6.7" at 100um and 11" at 160um), we expect the majority of sources and all cluster galaxies in our maps to be point sources. See sections 2.1 and 2.3 for further details. The IRAC Shallow Survey (ISS) was followed up with three more observations as part of SDWFS (Ashby et al. 2009, see J/ApJ/716/530), providing a factor of 2 deeper IRAC catalog with an aperture-corrected 5σ limit of 5.2uJy at 4.5um ([4.5]=18.83mag). Spitzer/MIPS observations are available from the MIPS AGM and Galaxy Evolution Survey (MAGES; Jannuzi et al. 2010AAS...21547001J). See section 2.4 for further details. Targeted follow up campaigns by our group have obtained spectroscopic redshifts for galaxies and AGNs in z>1 clusters using multi-object Keck optical spectroscopy and Wide Field Camera 3 (WFC3) slitless NIR grism spectroscopy from the Hubble Space Telescope (HST). The reader is directed to Brodwin et al. (2013ApJ...779..138B), Zeimann et al. (2013, J/ApJ/779/137), and references therein for a detailed description of the targeted spectroscopy. Some spectroscopic redshifts are additionally provided by the AGN and Galaxy Evolution Survey (AGES; Kochanek et al. 2012, J/ApJS/200/8). See section 2.2. (3 data files).

  1. VizieR Online Data Catalog: Milky Way global survey of star clusters. V. (Kharchenko+, 2016)

    NASA Astrophysics Data System (ADS)

    Kharchenko, N. V.; Piskunov, A. E.; Schilbach, E.; Roeser, S.; Scholz, R.-D.

    2015-11-01

    The catalogue presents integrated parameters in near-infrared (JHKs) passbands for 3208 Galactic star clusters. The integrated magnitudes are based on the most probable cluster members selected from the high-precision, homogeneous all-sky catalogue 2MAst that is constructed on the basis of catalogues PPMXL (Roeser et al., 2010, Cat. I/317) and 2MASS (Cutri et al., 2003, Cat. II/246). The integrated magnitudes are computed by adding the individual luminosities of the most secure cluster members. In order to put the computed magnitudes into a uniform and unbiased system they were corrected for the effect of unseen stars in the 2MAst. The clusters in the catalogue are sorted according to their numbers in the MWSC. (1 data file).

  2. VizieR Online Data Catalog: Gaia-ESO Survey. Parameters for cluster members (Jacobson+, 2016)

    NASA Astrophysics Data System (ADS)

    Jacobson, H. R.; Friel, E. D.; Jilkova, L.; Magrini, L.; Bragaglia, A.; Vallenari, A.; Tosi, M.; Randich, S.; Donati, P.; Cantat-Gaudin, T.; Sordo, R.; Smiljanic, R.; Overbeek, J. C.; Carraro, G.; Tautvaisiene, G.; San, Roman I.; Villanova, S.; Geisler, D.; Munoz, C.; Jimenez-Esteban, F.; Tang, B.; Gilmore, G.; Alfaro, E. J.; Bensby, T.; Flaccomio, E.; Koposov, S. E.; Korn, A. J.; Pancino, E.; Recio-Blanco, A.; Casey, A. R.; Costado, M. T.; Franciosini, E.; Heiter, U.; Hill, V.; Hourihane, A.; Lardo, C.; de Laverny, P.; Lewis, J.; Monaco, L.; Morbidelli, L.; Sacco, G. G.; Sousa, S. G.; Worley, C. C.; Zaggia, S.

    2016-05-01

    Parameters for confirmed stellar members of the open clusters Berkeley 44, Berkeley 81, NGC 2516, NGC 3532, NGC 4815, NGC 6005, NGC 6633, NGC 6705, NGC 6802, Pismis 18, Trumpler 20, Trumpler 23. (1 data file).

  3. VizieR Online Data Catalog: Radio properties of brightest cluster galaxies (Hogan+, 2015)

    NASA Astrophysics Data System (ADS)

    Hogan, M. T.; Edge, A. C.; Hlavacek-Larrondo, J.; Grainge, K. J. B.; Hamer, S. L.; Mahony, E. K.; Russell, H. R.; Fabian, A. C.; McNamara, B. R.; Wilman, R. J.

    2016-02-01

    Our parent sample is drawn from three ROSAT X-ray selected cluster catalogues - the Brightest Cluster Sample (BCS; Ebeling et al., 1998, Cat. J/MNRAS/301/881), the extended BCS (eBCS; Ebeling et al., 2000, Cat. J/MNRAS/318/333) and ROSAT-ESO Flux Limited X-ray (REFLEX; Bohringer et al., 2004, Cat. J/A+A/425/367) samples, which contain 206, 107 and 447 clusters, respectively. Since publication some catalogue entries have been reclassified, and there are also a small number of cross-catalogue duplicates. We therefore remove a minority of sources, leaving us with a sample of 199, 104 and 417 sources in the BCS, eBCS and REFLEX samples, respectively. Our total X-ray selected parent sample therefore consists of 720 clusters. (3 data files).

  4. VizieR Online Data Catalog: SALT galaxy clusters detected by ACT (Kirk+, 2015)

    NASA Astrophysics Data System (ADS)

    Kirk, B.; Hilton, M.; Cress, C.; Crawford, S. M.; Hughes, J. P.; Battaglia, N.; Bond, J. R.; Burke, C.; Gralla, M. B.; Hajian, A.; Hasselfield, M.; Hincks, A. D.; Infante, L.; Kosowsky, A.; Marriage, T. A.; Menanteau, F.; Moodley, K.; Niemack, M. D.; Sievers, J. L.; Sifon, C.; Wilson, S.; Wollack, E. J.; Zunckel, C.

    2016-01-01

    The clusters targeted for SALT observations were drawn from the SZ-selected sample constructed by the ACT team. ACT is a 6m telescope located in northern Chile that observes the sky in three frequency bands (centred at 148, 218, and 277GHz) simultaneously with arcminute resolution. We conducted observations of the seven target ACT clusters with RSS in multi-object spectroscopy (MOS) mode, which uses custom designed slit masks. (7 data files).

  5. VizieR Online Data Catalog: Massive quiescent ETG in clusters (Delaye+ 2014)

    NASA Astrophysics Data System (ADS)

    Delaye, L.; Huertas-Company, M.; Mei, S.; Lidman, C.; Licitra, R.; Newman, A.; Raichoor, A.; Shankar, F.; Barrientos, F.; Bernardi, M.; Cerulo, P.; Couch, W.; Demarco, R.; Munoz, R.; Sanchez-Janssen, R.; Tanaka, M.

    2015-01-01

    Our targets have been selected according to the following criteria: (1) they cover a broad redshift range 0.84cluster members. All clusters have HST/ACS WFC (Wide Field Camera) images in at least two bandpasses. The ACS WFC resolution is 0.05-arcsec/pix, and its field of view is 210-arcsecx204-arcsec. The ACS/WFC PSF width is around 0.11arcsec. Our ACS/WFC images were mostly obtained in a programme designed to find Type Ia supernovae in distant galaxy clusters (Dawson et al., 2009AJ....138.1271D). See Meyers et al. (2012ApJ...750....1M) for a description of how these data were processed. Three clusters (see below): RDCS J1252-2927, XMMU J2235.3-2557 and RX J0152-1357 had been previously targeted with the ACS camera on HST in the context of the ACS Intermediate Redshift Cluster Survey (Ford 2004, HST Proposal ID 10327, ACS Imaging of a High-Redshift Cluster of Galaxies; Postman et al. 2005ApJ...623..721P; Mei et al. 2009ApJ...690...42M) and these data have been included. (1 data file).

  6. VizieR Online Data Catalog: GALEX Ultraviolet Virgo Cluster Survey (GUViCS) (Boselli+, 2011)

    NASA Astrophysics Data System (ADS)

    Boselli, A.; Boissier, S.; Heinis, S.; Cortese, L.; Ilbert, O.; Hughes, T.; Cucciati, O.; Davies, J.; Ferrarese, L.; Giovanelli, R.; Haynes, M. P.; Baes, M.; Balkowski, C.; Brosch, N.; Chapman, S. C.; Charmandaris, V.; Clemens, M. S.; Dariush, A.; De Looze, I.; di Serego Alighieri, S.; Duc, P.-A.; Durrell, P. R.; Emsellem, E.; Erben, T.; Fritz, J.; Garcia-Appadoo, D. A.; Gavazzi, G.; Grossi, M.; Jordan, A.; Hess, K. M.; Huertas-Company, M.; Hunt, L. K.; Kent, B. R.; Lambas, D. G.; Lancon, A.; MacArthur, L. A.; Madden, S. C.; Magrini, L.; Mei, S.; Momjian, E.; Olowin, R. P.; Papastergis, E.; Smith, M. W. L.; Solanes, J. M.; Spector, O.; Spekkens, K.; Taylor, J. E.; Valotto, C.; van Driel, W.; Verstappen, J.; Vlahakis, C.; Vollmer, B.; Xilouris, E. M.

    2011-08-01

    The GALEX Ultraviolet Virgo Cluster Survey (GUViCS) is a complete blind survey of the Virgo cluster covering ~40 sq. deg in the far UV (FUV, λeff=1539Å, Δλ=442Å) and ~120 sq. deg in the near UV (NUV, λeff=2316Å, Δλ=1060Å). The goal of the survey is to study the ultraviolet (UV) properties of galaxies in a rich cluster environment, spanning a wide luminosity range from giants to dwarfs, and regardless of prior knowledge of their star formation activity. The UV data will be combined with those in other bands (optical: NGVS; far-infrared - submm: HeViCS; HI: ALFALFA) and with our multizone chemo-spectrophotometric models of galaxy evolution to make a complete and exhaustive study of the effects of the environment on the evolution of galaxies in high density regions. We present here the scientific objectives of the survey, describing the observing strategy and briefly discussing different data reduction techniques. Using UV data already in-hand for the central 12 sq. deg we determine the FUV and NUV luminosity functions of the Virgo cluster core for all cluster members and separately for early- and late-type galaxies and compare it to the one obtained in the field and other nearby clusters (Coma, A1367). This analysis shows that the FUV and NUV luminosity functions of the core of the Virgo clusters are flatter (alpha~-1.1) than those determined in Coma and A1367. We discuss the possible origin of this difference. (1 data file).

  7. BRIGHTEST X-RAY CLUSTERS OF GALAXIES IN THE CFHTLS WIDE FIELDS: CATALOG AND OPTICAL MASS ESTIMATOR

    SciTech Connect

    Mirkazemi, M.; Finoguenov, A.; Lerchster, M.; Erfanianfar, G.; Seitz, S.; Pereira, M. J.; Egami, E.; Tanaka, M.; Brimioulle, F.; Kettula, K.; McCracken, H. J.; Mellier, Y.; Kneib, J. P.; Rykoff, E.; Erben, T.; Taylor, J. E.

    2015-01-20

    The Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) presents a unique data set for weak-lensing studies, having high-quality imaging and deep multiband photometry. We have initiated an XMM-CFHTLS project to provide X-ray observations of the brightest X-ray-selected clusters within the wide CFHTLS area. Performance of these observations and the high quality of CFHTLS data allow us to revisit the identification of X-ray sources, introducing automated reproducible algorithms, based on the multicolor red sequence finder. We have also introduced a new optical mass proxy. We provide the calibration of the red sequence observed in the Canada-France-Hawaii filters and compare the results with the traditional single-color red sequence and photo-z. We test the identification algorithm on the subset of highly significant XMM clusters and identify 100% of the sample. We find that the integrated z-band luminosity of the red sequence galaxies correlates well with the X-ray luminosity, with a surprisingly small scatter of 0.20 dex. We further use the multicolor red sequence to reduce spurious detections in the full XMM and ROSAT All-Sky Survey (RASS) data sets, resulting in catalogs of 196 and 32 clusters, respectively. We made spectroscopic follow-up observations of some of these systems with HECTOSPEC and in combination with BOSS DR9 data. We also describe the modifications needed to the source detection algorithm in order to maintain high purity of extended sources in the shallow X-ray data. We also present the scaling relation between X-ray luminosity and velocity dispersion.

  8. Mg II Spectral Atlas and Flux Catalog for Late-Type Stars in the Hyades Cluster

    NASA Technical Reports Server (NTRS)

    Simon, Theodore

    2001-01-01

    In the course of a long-running IUE Guest Observer program, UV spectral images were obtained for more than 60 late-type members of the Hyades Cluster in order to investigate their chromospheric emissions. The emission line fluxes extracted from those observations were used to study the dependence of stellar dynamo activity upon age and rotation (IUE Observations of Rapidly Rotating Low-Mass Stars in Young Clusters: The Relation between Chromospheric Activity and Rotation). However, the details of those measurements, including a tabulation of the line fluxes, were never published. The purpose of the investigation summarized here was to extract all of the existing Hyades long-wavelength Mg II spectra in the IUE public archives in order to survey UV chromospheric emission in the cluster, thereby providing a consistent dataset for statistical and correlative studies of the relationship between stellar dynamo activity, rotation, and age over a broad range in mass.

  9. VizieR Online Data Catalog: CCD UBVRI photometry of 7 open star clusters (Sagar+, 2001)

    NASA Astrophysics Data System (ADS)

    Sagar, R.; Munari, U.; de Boer, K. S.

    2002-01-01

    We derive cluster parameters and mass functions from new UBVRI CCD photometric observations of ~3500 stars reaching down to V~20mag for the distant southern open star clusters NGC 3105, NGC 3603, Melotte 105, Hogg 15, NGC 4815, Pismis 20 and NGC 6253. For NGC 3105 and Hogg 15, CCD data are presented for the first time. The observations were carried out in 1992 between February 28 and March 8, June 5 and 9, and July 9 and 12 in the Cousins U, B, V, R and I photometric bands using CCD detector at the 1.0-m Elizabeth Telescope at the South African Astronomical Observatory (SAAO), Sutherland. (8 data files).

  10. VizieR Online Data Catalog: The Quintuplet cluster astrometry and photometry (Stolte+, 2014)

    NASA Astrophysics Data System (ADS)

    Stolte, A.; Hussmann, B.; Morris, M. R.; Ghez, A. M.; Brandner, W.; Lu, J. R.; Clarkson, W. I.; Habibi, M.; Matthews, K.

    2017-03-01

    For the proper motion analysis of the central region of the Quintuplet, data from the ESO Very Large Telescope (VLT) taken in 2003 were combined with Keck observations obtained in 2008 and 2009. A second epoch of NACO observations obtained in 2008 July was used to constrain the two-dimensional (2D) cluster motion from a sample of stars at larger radii from the cluster center. All positions are approximately centered on the central Quintuplet star Q12 (Glass et al. 1990MNRAS.242p..55G) at RA 17:46:15.12, DE -28:49:35.06. (2 data files).

  11. VizieR Online Data Catalog: Arches cluster: IR phot., extinction and masses (Habibi+, 2013)

    NASA Astrophysics Data System (ADS)

    Habibi, M.; Stolte, A.; Brandner, W.; Hussmann, B.; Motohara, K.

    2013-05-01

    We observed the Arches cluster out to its tidal radius using Ks-band and H-band imaging obtained on June 6-10 2008 with NAOS/CONICA at the VLT combined with Subaro/Cisco J-band data to gain a full understanding of the cluster mass distribution. The acquired Ks-band images cover four fields of 27.8*27.8(arcsec) each, provided by the medium resolution camera (S27) with a pixel scale of 0.027(arcsec). During the Ks-band observations, the natural visual seeing varied from 0.61" to 0.98". We achieved typical spatial resolutions of 0.081-0.135(arcsec) on individual frames using this AO setup. Seeing-limited J-band observations, on July 17, 2000, were performed with the CISCO spectrograph and camera which provided a pixel scale of 0.116(arcsec) and a field of view of 2*2(arcmin). An average seeing of 0.49(arcsec) resulted into a Full Width at Half Maximum (FWHM) of the point-spread function (PSF) of 0.39(arcsec) on the combined image. The catalogue includes derived infrared-photometry in J, H and Ks bands as well as derived individual extinction value and stellar masses. We used the NAOS-CONICA observations obtained in March 2002 in the central part of the Arches cluster to cover the whole cluster area. (1 data file).

  12. VizieR Online Data Catalog: New Variables in 3 Galactic open clusters (Palma+, 2016)

    NASA Astrophysics Data System (ADS)

    Palma, T.; Minniti, D.; Dekany, I.; Claria, J. J.; Alonso-Garcia, J.; Gramajo, L. V.; Ramirez Alegria, S.; Bonatto, C.

    2016-11-01

    The observations were made as part of the VVV Survey. For each cluster field, we extracted and analyzed VVV data for objects that best matched the positions of previously reported variable stars (Zejda et al., 2012, Cat. J/A+A/548/A97), and also performed a blind variability search. (3 data files).

  13. VizieR Online Data Catalog: JHK photometry of NGC 3115 globular clusters (Cantiello+, 2014)

    NASA Astrophysics Data System (ADS)

    Cantiello, M.; Blakeslee, J. P.; Raimondo, G.; Chies-Santos, A. L.; Jennings, Z. G.; Norris, M. A.; Kuntschner, H.

    2014-03-01

    Here, we report the catalogue built from the matching of J, H, and Ks band HAWK-I imaging data of NGC3115. The sample contains 1405 objects, including Globular Clusters host by NGC3115, foreground stars and background galaxies. All magnitudes are in the AB mag photometric system, uncorrected for extinction. (1 data file).

  14. VizieR Online Data Catalog: Subaru-UDGs in the Coma cluster (Yagi+, 2016)

    NASA Astrophysics Data System (ADS)

    Yagi, M.; Koda, J.; Komiyama, Y.; Yamanoi, H.

    2016-10-01

    We retrieved a wide W-C-RC band (R-band) survey of the Coma cluster of Suprime-Cam from the Subaru public archive (SMOKA; Baba et al. 2002ASPC..281..298B) between 2011 Mar 02 and 2011 Apr 01. (1 data file).

  15. VizieR Online Data Catalog: Radial velocities in seven globular clusters (Lardo+, 2015)

    NASA Astrophysics Data System (ADS)

    Lardo, C.; Pancino, E.; Bellazzini, M.; Bragaglia, A.; Donati, P.; Gilmore, G.; Randich, S.; Feltzing, S.; Jeffries, R. D.; Vallenari, A.; Alfaro, E. J.; Allende Prieto, C.; Flaccomio, E.; Koposov, S. E.; Recio-Blanco, A.; Bergemann, M.; Carraro, G.; Costado, M. T.; Damiani, F.; Hourihane, A.; Jofree, P.; de Laverny, P.; Marconi, G.; Masseron, T.; Morbidelli, L.; Sacco, G. G.; Worley, C. C.

    2014-11-01

    Velocities are given for 1826 stars in the field of the globular clusters NGC 1851, NGC 2808, NGC 4372, NGC 4833, NGC 5927, NGC 6752, and NGC 7078 observed with FLAMES/GIRAFFE@VLT. The table provides the individual identifications, coordinates, V magnitudes, velocities and their associated uncertainties for each star. (2 data files).

  16. VizieR Online Data Catalog: The young open cluster NGC 7067 (Monguio+, 2017)

    NASA Astrophysics Data System (ADS)

    Monguio, M.; Negueruela, I.; Marco, A.; Gonzalez-Fernandez, C.; Alonso-Santiago, J.; Costado, M. T.; Casamiquela, L.; Lopez-Corredoira, M.; Molgo, J.; Vilardell, F.; Alfaro, E. J.; Antoja, T.; Figueras, F.; Garcia, M.; Jordi, C.; Romero-Gomez, M.

    2017-02-01

    The Wide Field Camera (WFC) at the Isaac Newton Telescope (INT, 2.5m) - located at El Roque de los Muchachos in the Canary Islands - was used to obtain Stroemgren uvbyβ CCD photometry for this cluster. The observations were acquired during the nights of 2014 July 6-8. (3 data files).

  17. VizieR Online Data Catalog: Massive galaxy clusters lensing analyse (Richard+, 2010)

    NASA Astrophysics Data System (ADS)

    Richard, J.; Smith, G. P.; Kneib, J.-P.; Ellis, R. S.; Sanderson, A. J. R.; Pei, L.; Targett, T. A.; Sand, D. J.; Swinbank, A. M.; Dannerbauer, H.; Mazzotta, P.; Limousin, M.; Egami, E.; Jullo, E.; Hamilton-Morris, V.; Moran, S. M.

    2011-05-01

    High-resolution imaging data taken with the Advanced Camera for Surveys (ACS) or Wide Field Planetary Camera 2 (WFPC2) instrument on HST are available for each selected cluster in one or two bands, either through our dedicated LoCuSS programme (GO-DD 11312, PI: G.P. Smith) or from the archive. J- and KS-band data were obtained between 2003 March and 2007 April on the following near-infrared instruments: Wide Infrared Camera (WIRC) on the Palomar-200-inch telescope, Infrared Side Port Imager (ISPI) on the CTIO Blanco 4-m telescope and Florida Infrared Imaging Multi-Object Spectrograph (FLAMINGOS) on the Kitt Peak (KPNO) 4-m telescope. We used the LRIS on the Keck-I telescope to perform long-slit and multislit observations of the clusters. The spectroscopic data used in the current paper are the outcome of six different observing runs between 2004 and 2008. (1 data file).

  18. VizieR Online Data Catalog: Metallicity of the γ Vel cluster (Spina+, 2014)

    NASA Astrophysics Data System (ADS)

    Spina, L.; Randich, S.; Palla, F.; Sacco, G. G.; Magrini, L.; Franciosini, E.; Morbidelli, L.; Prisinzano, L.; Alfaro, E. J.; Biazzo, K.; Frasca, A.; Gonzalez Hernandez, J. I.; Sousa, S. G.; Adibekyan, V.; Delgado-Mena, E.; Montes, D.; Tabernero, H.; Klutsch, A.; Gilmore, G.; Feltzing, S.; Jeffries, R. D.; Micela, G.; Vallenari, A.; Bensby, T.; Bragaglia, A.; Flaccomio, E.; Koposov, S.; Lanzafame, A. C.; Pancino, E.; Recio-Blanco, A.; Smiljanic, R.; Costado, M. T.; Damiani, F.; Hill, V.; Hourihane, A.; Jofre, P.; de Laverny, P.; Masseron, T.; Worley, C.

    2014-05-01

    Atmospheric parameters, radial velocities, lithium equivalent widths are products of the Gaia-ESO Survey that were used for our membership analysis of the 48 UVES targets observed in the Gamma Velorum fields. Also photometry from Jeffries et al. (2009MNRAS.393..538J) has been used. Iron abundances of these stars have been used to determine the metal content of the cluster. We also discussed the metallicity derived through the iron abundances of the 208 cluster members targeted with GIRAFFE and identified by Jeffries et al. (2014A&A...563A..94J). Stellar parameters of 39 stars targeted by both UVES and GIRAFFE have been used to check the quality of the data. (4 data files).

  19. VizieR Online Data Catalog: Nuclear star clusters in 228 spiral galaxies (Georgiev+, 2014)

    NASA Astrophysics Data System (ADS)

    Georgiev, I. Y.; Boker, T.

    2015-02-01

    We searched the HST/WFPC2 archive for all exposures of galaxies with late Hubble type (t>=3.5) to avoid the most luminous bulges, an inclination of i<=88° to avoid edge-on galaxies, and distances of <=40Mpc, (m-M)<~33mag to be able to reliably measure the size of the Nuclear Star Clusters. (5 data files).

  20. VizieR Online Data Catalog: Δa observations of 3 globular clusters (Paunzen+, 2014)

    NASA Astrophysics Data System (ADS)

    Paunzen, E.; Iliev, I. Kh.; Pintado, O. I.; Baum, H.; Maitzen, H. M.; Netopil, M.; Onehag, A.; Zejda, M.; Fraga, L.

    2015-04-01

    The observations of the three globular clusters were performed at two different sites: * 2m Ritchey-Chretien-Coude telescope [Bulgarian National Astronomical Observatory (BNAO, Rozhen)], direct imaging, SITe SI003AB 1024x1024-pixel CCD, 5' field of view, 1pixel=0.32arcsec, and * 2.15m telescope [El Complejo Astronomico El Leoncito (CASLEO)], direct imaging with focal reducer, TEK-1024 CCD, 9.5-arcmin field of view, 1pixel=0.813arcsec. (3 data files).

  1. VizieR Online Data Catalog: ELG and AGN in WINGS clusters (Marziani+, 2017)

    NASA Astrophysics Data System (ADS)

    Marziani, P.; D'Onofrio, M.; Bettoni, D.; Poggianti, B. M.; Moretti, G.; Fasano, A.; Fritz, J.; Cava, A.; Varela, J.; Omizzolo, A.

    2016-11-01

    Emission line parameters for 5859 galaxies in the central regions of 46 ROSAT clusters are presented. Galaxies in the following clusters have been observed: A1069 A119 A151 A1631a A1644 A1831 A193 A1983 A1991 A2107 A2124 A2169 A2382 A2399 A2415 A2457 A2572a A2589 A2593 A2622 A2626 A3128 A3158 A3266 A3376 A3395 A3490 A3497 A3556 A3560 A376 A3809 A500 A671 A754 A957x A970 IIZW108 MKW3s RX0058 RX1022 RX1740 Z2844 Z8338 Z8852 For each galaxy we report cluster membership, rest-frame equivalent width of Hbeta and Halpha, errors or censorship flags, diagnostic ratios with errors or censorship flag, probability of correct classification from the location in the diagnostic diagrams (DDs), fluxes derived from photometry, log of luminosity, and notes. The identification of 7 Seyfert 1s is reported in the notes. See Section 4.1 of the paper for a more detailed explanation. (1 data file).

  2. VizieR Online Data Catalog: RR Lyrae in 15 Galactic globular clusters (Dambis+, 2014)

    NASA Astrophysics Data System (ADS)

    Dambis, A. K.; Rastorguev, A. S.; Zabolotskikh, M. V.

    2014-11-01

    Last year, the WISE All-Sky Data Release (Cutri et al., 2012, Cat. II/328) was made public, mapping the entire sky in four mid-infrared bands W1, W2, W3 and W4 with the effective wavelengths of 3.368, 4.618, 12.082 and 22.194um, respectively. We cross-correlated the WISE single-exposure data base with the Catalogue of Galactic globular-cluster variables by Clement et al. (2001AJ....122.2587C), the Catalogue of Accurate Equatorial Coordinates for Variable Stars in Globular Clusters by Samus et al. (2009PASP..121.1378S, Cat. J/PASP/121/1378) and the catalogue of Sawyer Hogg (1973PDDO....3....6S, Cat. V/97) (for ω Cen, NGC 6723 and NGC 6934) to compute (via Fourier fits) the intensity-mean average W1- and W2-band magnitudes, and , for a total of 357 and 272 RR Lyrae type variables in 15 and 9 Galactic globular clusters, respectively. (1 data file).

  3. VizieR Online Data Catalog: Gamma Vel cluster membership and IMF (Prisinzano+, 2016)

    NASA Astrophysics Data System (ADS)

    Prisinzano, L.; Damiani, F.; Micela, G.; Jeffries, R. D.; Franciosini, E.; Sacco, G. G.; Frasca, A.; Klutsch, A.; Lanzafame, A.; Alfaro, E. J.; Biazzo, K.; Bonito, R.; Bragaglia, A.; Caramazza, M.; Vallenari, A.; Carraro, G.; Costado, M. T.; Flaccomio, E.; Jofre, P.; Lardo, C.; Monaco, L.; Morbidelli, L.; Mowlavi, N.; Pancino, E.; Randich, S.; Zaggia, S.

    2016-04-01

    We derived a list as complete as possible of confirmed members of the young open cluster Gamma Velorum, with the aim of deriving general cluster properties such as the IMF. We used all available spectroscopic membership indicators within the Gaia-ESO public archive, based on spectra acquired with FLAMES a the VLT using the GIRAFFE intermediate-resolution spectrograph. In addition, we used literature photometry and X-ray data. For each membership criterion, we derived the most complete list of candidate cluster members. Then, we considered photometry, gravity, and radial velocities as necessary conditions for selecting a subsample of candidates whose membership was confirmed by using the lithium and Halpha lines and X-rays as youth indicators. Table 5 lists the fundamental parameters of the confirmed and possible members in Gamma Velorum, i.e. photometry, radial velocities, equivalent widths of the lithium line, the Halpha activity index, the X-ray flag, the gravity gamma index and the stellar masses. Finally the binarity and membership flags are given. (1 data file).

  4. The SLUGGS Survey: A Catalog of Over 4000 Globular Cluster Radial Velocities in 27 Nearby Early-type Galaxies

    NASA Astrophysics Data System (ADS)

    Forbes, Duncan A.; Alabi, Adebusola; Brodie, Jean P.; Romanowsky, Aaron J.; Strader, Jay; Foster, Caroline; Usher, Christopher; Spitler, Lee; Bellstedt, Sabine; Pastorello, Nicola; Villaume, Alexa; Wasserman, Asher; Pota, Vincenzo

    2017-03-01

    Here, we present positions and radial velocities for over 4000 globular clusters (GCs) in 27 nearby early-type galaxies from the SLUGGS survey. The SLUGGS survey is designed to be representative of elliptical and lenticular galaxies in the stellar mass range 10 < log {M}* /M ⊙ < 11.7. The data have been obtained over many years, mostly using the very stable multi-object spectrograph DEIMOS on the Keck II 10 m telescope. Radial velocities are measured using the calcium triplet lines, with a velocity accuracy of ±10–15 km s‑1. We use phase space diagrams (i.e., velocity–position diagrams) to identify contaminants such as foreground stars and background galaxies, and to show that the contribution of GCs from neighboring galaxies is generally insignificant. Likely ultra-compact dwarfs are tabulated separately. We find that the mean velocity of the GC system is close to that of the host galaxy systemic velocity, indicating that the GC system is in overall dynamical equilibrium within the galaxy potential. We also find that the GC system velocity dispersion scales with host galaxy stellar mass, in a similar manner to the Faber–Jackson relation for the stellar velocity dispersion. Publication of these GC radial velocity catalogs should enable further studies in many areas, such as GC system substructure, kinematics, and host galaxy mass measurements.

  5. VizieR Online Data Catalog: Planck submillimetre sources in Virgo Cluster (Baes+, 2014)

    NASA Astrophysics Data System (ADS)

    Baes, M.; Herranz, D.; Bianchi, S.; Ciesla, L.; Clemens, M.; de Zotti, G.; Allaert, F.; Auld, R.; Bendo, G. J.; Boquien, M.; Boselli, A.; Clements, D. L.; Cortese, L.; Davies, J. I.; de Looze, I.; di Serego Alighieri, S.; Fritz, J.; Gentile, G.; Gonzalez-Nuevo, J.; Hughes, T.; Smith, M. W. L.; Verstappen, J.; Viaene, S.; Vlahakis, C.

    2014-04-01

    We cross-correlate the Planck Catalogue of Compact Sources (PCCS) with the fully sampled 84deg2 Herschel Virgo Cluster Survey (HeViCS) fields. We search for and identify the 857 and 545GHz PCCS sources in the HeViCS fields by studying their FIR/submm and optical counterparts. We find 84 and 48 compact Planck sources in the HeViCS fields at 857 and 545GHz, respectively. Almost all sources correspond to individual bright Virgo Cluster galaxies. The vast majority of the Planck detected galaxies are late-type spirals, with the Sc class dominating the numbers, while early-type galaxies are virtually absent from the sample, especially at 545GHz. We compare the HeViCS SPIRE flux densities for the detected galaxies with the four different PCCS flux density estimators and find an excellent correlation with the aperture photometry flux densities, even at the highest flux density levels. We find only seven PCCS sources in the HeViCS fields without a nearby galaxy as obvious counterpart, and conclude that all of these are dominated by Galactic cirrus features or are spurious detections. No Planck sources in the HeViCS fields seem to be associated to high-redshift proto-clusters of dusty galaxies or strongly lensed submm sources. Finally, our study is the first empirical confirmation of the simulation-based estimated completeness of the PCCS, and provides a strong support of the internal PCCS validation procedure. (2 data files).

  6. VizieR Online Data Catalog: On the metallicity of open clusters. III. (Netopil+, 2016)

    NASA Astrophysics Data System (ADS)

    Netopil, M.; Paunzen, E.; Heiter, U.; Soubiran, C.

    2016-03-01

    In Paper II (Heiter et al., Paper II 2014A&A...561A..93H) we have evaluated available spectroscopic iron abundance determinations of open cluster stars and presented mean values for 78 open clusters. The results are based on high-resolution data (R>=25000) with high signal-to-noise ratios (S/N>=50). Furthermore, quality criteria were introduced by adopting only [Fe/H] measurements of stars with Teff=4400-6500K and logg>=2.0dex. We have to note that the mean iron abundance for Berkeley 29, listed in Paper II, also incorporates some measurements based upon lower S/N data. In the present paper we therefore list the correct values for the higher and lower quality data. Since publication of Paper II, some new studies were made (Boesgaard et al., 2013ApJ...775...58B; Bocek Topcu et al., 2015, Cat. J/MNRAS/446/3562; Carraro et al., 2014A&A...568A..86C; Donati et al., 2015, Cat. J/MNRAS/446/1411; Magrini et al.. 2014A&A...563A..44M, 2015A&A...580A..85M; Molenda-Zakowicz et al., 2014MNRAS.445.2446M; Monaco et al., 2014A&A...564L...6M; Reddy et al., 2015MNRAS.450.4301R), which we examined the same way as described in Paper II. This adds ten open clusters to our list (Berkeley 81, NGC 1342, NGC 1662, NGC 1912, NGC 2354, NGC 4337, NGC 4815, NGC 6811, Trumpler 5, and Trumpler 20) and supplementary data for NGC 752, NGC 2447, NGC 2632, and NGC 6705. (1 data file).

  7. VizieR Online Data Catalog: Globular cluster candidates in NGC 3115 (Jennings+, 2014)

    NASA Astrophysics Data System (ADS)

    Jennings, Z. G.; Strader, J.; Romanowsky, A. J.; Brodie, J. P.; Arnold, J. A.; Lin, D.; Irwin, J. A.; Sivakoff, G. R.; Wong, K.-W.

    2014-10-01

    We have performed photometry and size measurements for 360 globular cluster candidates in Hubble Space Telescope/Advanced Camera for Surveys (HST/ACS) imaging of NGC 3115. We have also presented Suprime-Cam photometry for 421 additional candidates. The primary data set analyzed in this work is the ACS/WFC mosaic of NGC 3115 from HST Program 12759 (PI: Jimmy Irwin). NGC 3115 was imaged in g-, r- and i-band filters on 2008 January 4 using Suprime-Cam on the 8.2m Subaru telescope. (2 data files).

  8. VizieR Online Data Catalog: PHAT. XVI. Star cluster masses and ages (Johnson+, 2016)

    NASA Astrophysics Data System (ADS)

    Johnson, L. C.; Seth, A. C.; Dalcanton, J. J.; Beerman, L. C.; Fouesneau, M.; Lewis, A. R.; Weisz, D. R.; Williams, B. F.; Bell, E. F.; Dolphin, A. E.; Larsen, S. S.; Sandstrom, K.; Skillman, E. D.

    2016-11-01

    The Panchromatic Hubble Andromeda Treasury (PHAT) survey imaged 1/3 of the disk of M31 in six passbands spanning near-ultraviolet to near-infrared wavelengths. The survey provides resolved stellar photometry of 117 million sources that we use to determine the properties of both the cluster and field populations, with completeness limits that allow the detection of individual MS stars down to ~3Mȯ. Here we provide an overview of the crowded field stellar photometry derived for PHAT; full details are found in Dalcanton+ (2012ApJS..200...18D) and Williams+ (2014, J/ApJS/215/9). (1 data file).

  9. VizieR Online Data Catalog: AGES sources in Virgo cluster (Taylor+, 2012)

    NASA Astrophysics Data System (ADS)

    Taylor, R.; Davies, J. I.; Auld, R.; Minchin, R. F.

    2013-04-01

    Two areas of the Virgo cluster have been selected for study with AGES, VC1 and VC2. This paper examines the VC1 area while Paper II (2013MNRAS.428..459T) will consider VC2 and compare the results of the two areas. Observations were taken in 2008 January-June, 2009 February-June, 2010 January-June and 2011 January, using the Arecibo L-band Feed Array (ALFA) instrument on the Arecibo telescope in spectral line mode. (4 data files).

  10. VizieR Online Data Catalog: Candidate red supergiants in Galactic clusters (Messineo+, 2014)

    NASA Astrophysics Data System (ADS)

    Messineo, M.; Zhu, Q. F.; Ivanov, V. D.; Figer, D. F.; Davies, B.; Menten, K. M.; Kudritzki, R. P.; Chen, C.-H. R.

    2015-01-01

    A set of spectroscopic data was taken with the UKIRT 1-5-micron Imager Spectrometer (UIST) on Mauna Kea under program ID H243NS (PI: Kudritzki) on 2008 July 24. For four of the targeted candidate clusters, additional low-resolution and medium-resolution spectra were obtained with the SofI spectrograph mounted on the NTT telescope. Data were taken under program 60.A-9700(E) at Paranal-La Silla Observatory on 2010 August 3, and under program 089.D-0876 on 2012 June 1. (3 data files).

  11. VizieR Online Data Catalog: eMSTOs in low mass clusters (Piatti+, 2016)

    NASA Astrophysics Data System (ADS)

    Piatti, A. E.; Bastian, N.

    2016-03-01

    We obtained images of four previously selected unstudied LMC clusters with the Gemini South telescope and the GMOS-S instrument through g and i filters. In imaging mode GMOS-S has a field of view of approximately 5.5'x5.5' at a scale of 0.16-arcsec per (2x2 binned) pixel. The detector array consists of three 2Kx4K Hamamatsu chips arranged in a row. Observations were executed in queue mode (under programme GS-2015A-Q-44, PI: Piatti), which enabled the data to be obtained in excellent seeing and under photometric conditions. (4 data files).

  12. VizieR Online Data Catalog: Fornax Cluster Spectroscopic Survey 2MASS galaxies (Morris+ 2007)

    NASA Astrophysics Data System (ADS)

    Morris, R. A. H.; Phillipps, S.; Jones, J. B.; Drinkwater, M. J.; Gregg, M. D.; Couch, W. J.; Parker, Q. A.; Smith, R. M.

    2007-09-01

    We present two tables, the results of matching the Fornax Cluster Spectroscopic Survey (FCSS) both with the 2MASS extended source catalogue (XSC) and the 2MASS point source catalogue (PSC, Cat. II/246). The 2MASS 2nd release data described in Jarrett et al. (2000AJ....119.2498J) is used in this paper. xsc-fcss.dat contains 114 extended objects in a circle of radius 1degree centred on NGC1399, 84 are matched in the FCSS itself using a positional error of 3", 28 are in the brighter FLAIR sample of Drinkwater et al. (2001ApJ...548L.139D) and two are 15th magnitude galaxies in the Ferguson (1989AJ.....98..367F, Cat. ) Fornax Cluster Catalogue (FCC). psc-fcss.dat contains objects that are in the 2MASS PSC and also in the FCSS again using a positional error of 3". Objects with cz of less than 900km/s are removed as are objects which are also in the extended sample above to leave a sample of 228 confirmed galaxies. (2 data files).

  13. VizieR Online Data Catalog: UBVR photometry of the open cluster King 2 (Aparicio+ 1990)

    NASA Astrophysics Data System (ADS)

    Aparicio, A.; Bertelli, G.; Chiosi, C.; Garcia-Pelayo, J. M.

    2003-06-01

    In this paper we present the Johnson-Cousins UBVR CCD photometry of the stars in King 2, an old open cluster towards the galactic anticenter. We have obtained the colour-magnitude diagram, the colour excess, the reddening, an estimate of the metallicity, and the distance modulus. The comparison of the observational colour-magnitude diagram with the theoretical simulations based on stellar models with convective overshoot shows that a major revision of the model structure is required. To this aim, we explore the possibility that the formulation of convective overshoot for stars in the mass range 1 to 2M{sun} ought to be different from the one currently in use. The point of major uncertainty that we see to affect the stars in this domain is whether or not convective overshoot may erode the gradient in molecular weight in the regions surrounding the convective core. We find that models, in which this is not allowed to occur, better fit the overall morphology of the colour-magnitude diagram of King 2. In addition to this, analyzing the width of the main sequence band we suggest that a significant fraction of the stars are members of binary systems, and evaluate the range spanned by their mass ratios. Finally, we derive the luminosity function and the mass function for the main sequence stars of the cluster. (1 data file).

  14. VizieR Online Data Catalog: Optically visible open clusters and Candidates (Dias+ 2002-2010)

    NASA Astrophysics Data System (ADS)

    Dias, W. S.; Alessi, B. S.; Moitinho, A.; Lepine, J. R. D.

    2010-04-01

    We have compiled a new catalogue of open clusters in the Galaxy which updates the previous catalogues of Lynga (1987, Cat. ) and of Mermilliod (1995, in Information and On-Line Data in Astronomy, ed. D. Egret & M. A. Albrecht (Dordrecht: Kluwer), 127) (included in the WEBDA database, http://obswww.unige.ch/webda). New objects and new data, in particular, data on kinematics (proper motions) that were not present in the old catalogues, have been included. Virtually all the clusters (1629) presently known were included, which represents an increment of about 476 objects relative to the Lynga (1987, Cat. ) catalogue. The catalogue is presented in a single table containing all the important data, which makes it easy to use. In total, 99% of the objects have estimates of their apparent diameters, and 38% have distance, E(B-V) and age determinations. Concerning the data on kinematics, 22% have their mean proper motions listed, 14% their mean radial velocities, and 11% have both information simultaneously. (5 data files).

  15. VizieR Online Data Catalog: Optically visible open clusters and Candidates (Dias+ 2002-2015)

    NASA Astrophysics Data System (ADS)

    Dias, W. S.; Alessi, B. S.; Moitinho, A.; Lepine, J. R. D.

    2014-10-01

    We have compiled a new catalogue of open clusters in the Galaxy which updates the previous catalogues of Lynga (1987, Cat. VII/92) and of Mermilliod (1995, in Information and On-Line Data in Astronomy, ed. D. Egret & M. A. Albrecht (Dordrecht: Kluwer), 127) (included in the WEBDA database, http://obswww.unige.ch/webda). New objects and new data, in particular, data on kinematics (proper motions) that were not present in the old catalogues, have been included. Virtually all the clusters (2167) presently known were included, which represents an increment of about 986 objects relative to the Lynga (1987, VII/92) catalogue. The catalogue is presented in a single table containing all the important data, which makes it easy to use. In total, 99.7% of the objects have estimates of their apparent diameters, and 74.5% have distance, E(B-V) and age determinations. Concerning the data on kinematics, 54.7% have their mean proper motions listed, 25% their mean radial velocities, and 24.2% have both information simultaneously. (6 data files).

  16. VizieR Online Data Catalog: Optically visible open clusters and Candidates (Dias+ 2002-2013)

    NASA Astrophysics Data System (ADS)

    Dias, W. S.; Alessi, B. S.; Moitinho, A.; Lepine, J. R. D.

    2012-01-01

    We have compiled a new catalogue of open clusters in the Galaxy which updates the previous catalogues of Lynga (1987, Cat. ) and of Mermilliod (1995, in Information and On-Line Data in Astronomy, ed. D. Egret & M. A. Albrecht (Dordrecht: Kluwer), 127) (included in the WEBDA database, http://obswww.unige.ch/webda). New objects and new data, in particular, data on kinematics (proper motions) that were not present in the old catalogues, have been included. Virtually all the clusters (1629) presently known were included, which represents an increment of about 476 objects relative to the Lynga (1987, Cat. ) catalogue. The catalogue is presented in a single table containing all the important data, which makes it easy to use. In total, 99% of the objects have estimates of their apparent diameters, and 38% have distance, E(B-V) and age determinations. Concerning the data on kinematics, 22% have their mean proper motions listed, 14% their mean radial velocities, and 11% have both information simultaneously. (6 data files).

  17. VizieR Online Data Catalog: Optically visible open clusters and Candidates (Dias+ 2002-2007)

    NASA Astrophysics Data System (ADS)

    Dias, W. S.; Alessi, B. S.; Moitinho, A.; Lepine, J. R. D.

    2007-09-01

    We have compiled a new catalogue of open clusters in the Galaxy which updates the previous catalogues of Lynga (1987, Cat. ) and of Mermilliod (1995, in Information and On-Line Data in Astronomy, ed. D. Egret & M. A. Albrecht (Dordrecht: Kluwer), 127) (included in the WEBDA database, http://obswww.unige.ch/webda). New objects and new data, in particular, data on kinematics (proper motions) that were not present in the old catalogues, have been included. Virtually all the clusters (1629) presently known were included, which represents an increment of about 476 objects relative to the Lynga (1987, Cat. ) catalogue. The catalogue is presented in a single table containing all the important data, which makes it easy to use. In total, 99% of the objects have estimates of their apparent diameters, and 38% have distance, E(B-V) and age determinations. Concerning the data on kinematics, 22% have their mean proper motions listed, 14% their mean radial velocities, and 11% have both information simultaneously. (5 data files).

  18. VizieR Online Data Catalog: JK photometry of 12 galactic globular clusters (Cohen+, 2015)

    NASA Astrophysics Data System (ADS)

    Cohen, R. E.; Hempel, M.; Mauro, F.; Geisler, D.; Alonso-Garcia, J.; Kinemuchi, K.

    2016-04-01

    Observations of our 12 target clusters were obtained with the Infrared Side Port Imager (ISPI) mounted on the 4m Blanco telescope at Cerro Tololo Inter-American Observatory. The HAWAII-2 2048*2048 pixel detector has 0.305''/pixel, giving a field of view 10.25arcmin per side. Imaging was obtained in the J and KS filters over the course of three runs between 2008 and 2010 (NGC 104 and NGC 6496 on 2008 Aug 13; NGC 1851 and NGC 288 on 2009 Sep 30; NGC 362, NGC 1261, and NGC 7099 on 2009 Oct 01; NGC 2808 and NGC 6304 on 2010 Apr 28; NGC 4833 on 2010 Apr 29; NGC 5927 and NGC 6584 on 2010 Apr 30), with median seeing ranging between 0.8'' and 1.4''. (2 data files).

  19. VizieR Online Data Catalog: Berkeley 90. III. Cluster parameters (Marco+, 2017)

    NASA Astrophysics Data System (ADS)

    Marco, A.; Negueruela, I.

    2017-01-01

    We present tables with coordinates in J2000, Johnson photometry and near-IR photometry for stars in the open cluster Berkeley 90 and a field to the southeast of this region. We used the imager and spectrograph Andalucia Faint Object Spectrograph and Camera (ALFOSC) on the Nordic Optical Telescope (NOT) at the La Palma observatory to obtain UBVR photometry on the night of 2007 July 9, and spectroscopy of 20 selected stars on the nights of 2004 October 4, 2005 October 2-4 and 2007 July 10. We also downloaded UKIDSS (https://www.ukidss.org/archive/archive.html) images in the JHKS filters to perform deep near-IR photometry. (2 data files).

  20. VizieR Online Data Catalog: Ages and masses of LMC clusters (de Grijs+, 2013)

    NASA Astrophysics Data System (ADS)

    de Grijs, R.; Goodwin, S. P.; Anders, P.

    2014-10-01

    We specifically focused on the catalogue of Glatt, Grebel & Koch (2010, Cat. J/A+A/571/A50), who compiled data of 1193 populous LMC clusters with ages of up to 1 Gyr based on the most up-to-date and comprehensive LMC object catalogue of Bica et al. (2008, Cat. J/MNRAS/389/678). Glatt et al. (2010, Cat. J/A+A/571/A50) used the optical broad-band photometry from the Magellanic Clouds Photometric Survey (MCPS; Zaritsky et al., 2004, Cat. J/AJ/128/1606) to construct colour-magnitude diagrams (CMDs) and subsequently determined ages for their entire sample based on isochrone fits. (1 data file).

  1. VizieR Online Data Catalog: Galaxies in the UMa cluster complex (Karachentsev+, 2013)

    NASA Astrophysics Data System (ADS)

    Karachentsev, I. D.; Nasonova, O. G.; Courtois, H. M.

    2015-04-01

    A nearby friable cloud in Ursa Majoris contains 270 galaxies with radial velocities 500cluster. The total virial mass of the UMa groups is 4x1013M⊙, yielding the average density of dark matter in the UMa cloud to be Ωm=0.08, i.e. a factor of 3 lower than the cosmic average. This is despite the fact that the UMa cloud resides in a region of the Universe that is an apparent overdensity. A possible explanation for this is that most mass in the Universe lies in the empty space between clusters. Herewith, the mean distances and velocities of the UMa groups follow nearly undisturbed Hubble flow without a sign of the 'Z-wave' effect caused by infall towards a massive attractor. This constrains the total amount of dark matter between the UMa groups within the cloud volume. (1 data file).

  2. VizieR Online Data Catalog: Kinematics of young associations/clusters (Tetzlaff+, 2010)

    NASA Astrophysics Data System (ADS)

    Tetzlaff, N.; Neuhaeuser, R.; Hohle, M. M.; Maciejewski, G.

    2010-03-01

    Given a distance of 1kpc and typical neutron star velocities of 100-500km/s (Arzoumanian et al. 2002ApJ...568..289A; Hobbs et al., 2005, Cat. J/MNRAS/360/974) and maximum ages of 5Myr for neutron stars to be detectable in the optical (see cooling curves in Gusakov et al. 2005MNRAS.363..555G and Popov, Grigorian & Blaschke 2006, Phys. Rev. C, 74, 025803), we restricted our search for birth associations and clusters of young nearby neutron stars to within 3kpc. We chose a sample of OB associations and young clusters (we use the term `association' for both in the following) within 3kpc from the Sun with available kinematic data and distance. We collected those from Dambis, Mel'nik & Rastorguev (2001AstL...27...58D) and Hoogerwerf (2001A&A...365...49H) and associations to which stars from the Galactic O-star catalogue from Maiz-Apellaniz et al. (2004, Cat. J/ApJS/151/103) are associated with. Furthermore, we added young local associations (YLA) from Fernandez, Figueras & Torra (2008A&A...480..735F) since they are possible hosts of a few SNe in the near past. We also included the Hercules-Lyrae association (Her-Lyr) and the Pleiades and massive star-forming regions (Reipurth 2008, ASP Monograph Publ. Vol. 4 and Vol. 5). We set the lower limit of the association age to 2Myr to account for the minimum lifetime of a progenitor star that can produce a neutron star (progenitor mass smaller than 30M⊙ see e.g. Heger et al. 2003ApJ...591..288H). The list of all explored associations and their properties can be found in Appendix A. Coordinates as well as heliocentric velocity components are given for a right-handed coordinate system with the x-axis pointing towards the galactic centre and y is positive in the direction of galactic rotation. (2 data files).

  3. VizieR Online Data Catalog: POPSTAR models. III. Young star clusters (Garcia-Vargas+, 2013)

    NASA Astrophysics Data System (ADS)

    Garcia-Vargas, M. L.; Molla, M.; Martin-Manjon, M. L.

    2013-07-01

    table6.zip includes all the files listed in list.dat and available individually in the subdirectory "models". We have calculated the colours of a system composed of two populations: one older than 100Myr (log{tau}(yr)>=8.00) and one younger than this same limit (log{tau}<8.00). The stellar mass of the young population in this model grid takes the same values as in the SSP models: 0.12, 0.20, 0.40, 0.60, 1.0, 1.5 and 2.0 x105M⊙. For each model or composite system, we assume an old stellar population with a mass on the zero time main sequence defined by a factor F=Mold/Myoung. We have taken 6 possible values for this grid, F=0, 1, 10, 100, 1000 and 5000. Colours are computed by using the total luminosity emitted by both the old population and the young stellar population, including the emission lines contribution and the nebular continuum. We have obtained a table for each old stellar population defined by its age and metallicity, where all possible combinations with the young stellar population (scanning the grid in mass, age and metallicity of the young cluster) are included. table6.zip is a zip file with all these tables (198 files, 33 ages for each of the six metallicities). See section 4 for further explanations. (6 data files).

  4. VizieR Online Data Catalog: Kinematics of the Gamma Vel cluster (Jeffries+, 2014)

    NASA Astrophysics Data System (ADS)

    Jeffries, R. D.; Jackson, R. J.; Cottaar, M.; Koposov, S. E.; Lanzafame, A. C.; Meyer, M. R.; Prisinzano, L.; Randich, S.; Sacco, G. G.; Brugaletta, E.; Caramazza, M.; Damiani, F.; Franciosini, E.; Frasca, A.; Gilmore, G.; Feltzing, S.; Micela, G.; Alfaro, E.; Bensby, T.; Pancino, E.; Recio-Blanco, A.; de Laverny, P.; Lewis, J.; Magrini, L.; Morbidelli, L.; Costado, M. T.; Jofre, P.; Klutsch, A.; Lind, K.; Maiorca, E.

    2014-01-01

    The positions, photometry, radial velocities, projected equatorial velocities and lithium equivalent widths for 208 members of the Gamma2 Velorum cluster. These members were selected on the basis of their positions in the V versus V-I colour-magnitude diagram and the strength of lithium absorption in their spectra. The photometry is from Jeffries et al. (2009MNRAS.393..538J). The radial velocities, projected equatorial velocities and equivalent widths of the 6708 angstrom LiI feature are from spectra taken with FLAMES/GIRAFFE at the VLT as part of the Gaia-ESO spectroscopic survey. Although values of projected equatorial velocity less than 10km/s are reported, these should be treated as upper limits at 10km/s. Masses are estimated from the $V-I$ colour and models of Baraffe et al. (1998A&A...337..403B) for an assumed age of 10Myr. Two kinematic populations are reported in the paper; P(A) reports the probability that a star belongs to population "A". (1 data file).

  5. VizieR Online Data Catalog: SX Phe stars in globular clusters (Cohen+, 2012)

    NASA Astrophysics Data System (ADS)

    Cohen, R. E.; Sarajedini, A.

    2012-06-01

    To compile a current list of SX Phe in GGCs, we began with the catalogue of Rodriguez & Lopez-Gonzalez (2000, Cat. J/A+A/359/597), which was updated by Santolamazza et al. (2001ApJ...554.1124S). We then added to this list all SX Phe in GGCs found in the literature since the publication of those studies. This more than doubled the number of SX Phe in GGCs, from 117 listed by Santolamazza et al. (2001ApJ...554.1124S) to 263 currently known. For the sake of homogeneity, we have excluded the small number of SX Phe in E 3, IC 4499 and Ruprecht 106 from our analysis because isochrone fits to those clusters were not performed by D10. In addition, we have excluded all stars from the original Rodriguez & Lopez-Gonzalez (2000, Cat. J/A+A/359/597) catalogue which were also excluded by Santolamazza et al. (2001ApJ...554.1124S), as well as all SX Phe in NGC 3201 and 4372 due to high differential reddening (Gerashchenko, Kadla & Malakhova, 1999ARep...43...20G; Piersimoni, Bono & Ripepi, 2002AJ....124.1528P). (1 data file).

  6. VizieR Online Data Catalog: Kinematic data of Galactic globular clusters (Eadie+, 2016)

    NASA Astrophysics Data System (ADS)

    Eadie, G. M.; Harris, W. E.

    2016-11-01

    We present mass and mass profile estimates for the Milky Way (MW) Galaxy using the Bayesian analysis developed by Eadie et al. (2015ApJ...806...54E) and using globular clusters (GCs) as tracers of the Galactic potential. The dark matter and GCs are assumed to follow different spatial distributions; we assume power-law model profiles and use the model distribution functions described in Evans et al. (1997MNRAS.286..315E) and Deason et al. (2012MNRAS.424L..44D). We explore the relationships between assumptions about model parameters and how these assumptions affect mass profile estimates. We also explore how using subsamples of the GC population beyond certain radii affect mass estimates. After exploring the posterior distributions of different parameter assumption scenarios, we conclude that a conservative estimate of the Galaxy's mass within 125kpc is 5.22x1011Mȯ, with a 50% probability region of (4.79,5.63)x1011Mȯ. Extrapolating out to the virial radius, we obtain a virial mass for the MW of 6.82x1011Mȯ with 50% credible region of (6.06,7.53)x1011Mȯ (rvir=185-7+7kpc). If we consider only the GCs beyond 10 kpc, then the virial mass is 9.02(5.69,10.86)x1011Mȯ (rvir=198-24+19kpc). We also arrive at an estimate of the velocity anisotropy parameter β of the GC population, which is β=0.28 with a 50% credible region (0.21, 0.35). Interestingly, the mass estimates are sensitive to both the dark matter halo potential and visible matter tracer parameters, but are not very sensitive to the anisotropy parameter. (1 data file).

  7. A NEW REDUCTION OF THE BLANCO COSMOLOGY SURVEY: AN OPTICALLY SELECTED GALAXY CLUSTER CATALOG AND A PUBLIC RELEASE OF OPTICAL DATA PRODUCTS

    SciTech Connect

    Bleem, L. E.; Stalder, B.; Brodwin, M.; Busha, M. T.; Wechsler, R. H.; Gladders, M. D.; High, F. W.; Rest, A.

    2015-01-01

    The Blanco Cosmology Survey is a four-band (griz) optical-imaging survey of ∼80 deg{sup 2} of the southern sky. The survey consists of two fields centered approximately at (R.A., decl.) = (23{sup h}, –55°) and (5{sup h}30{sup m}, –53°) with imaging sufficient for the detection of L {sub *} galaxies at redshift z ≤ 1. In this paper, we present our reduction of the survey data and describe a new technique for the separation of stars and galaxies. We search the calibrated source catalogs for galaxy clusters at z ≤ 0.75 by identifying spatial over-densities of red-sequence galaxies and report the coordinates, redshifts, and optical richnesses, λ, for 764 galaxy clusters at z ≤ 0.75. This sample, >85% of which are new discoveries, has a median redshift of z = 0.52 and median richness λ(0.4 L {sub *}) = 16.4. Accompanying this paper we also release full survey data products including reduced images and calibrated source catalogs. These products are available at http://data.rcc.uchicago.edu/dataset/blanco-cosmology-survey.

  8. Population studies in groups and clusters of galaxies. III. A catalog of galaxies in five nearby groups

    SciTech Connect

    Ferguson, H.C.; Sandage, A. Mount Wilson and Las Campanas Observatories, Pasadena, CA Space Telescope Science Institute, Baltimore, MD )

    1990-07-01

    Five nearby groups of galaxies have been surveyed using large-scale plates from the 2.5 m duPont Telescope at Las Campanas Observatory. Catalogs of galaxies brighter than B(T) = 20 are presented for the Leo, Dorado, NGC 1400, NGC 5044, and Antlia groups. A total of 1044 galaxies are included, from visual inspection of 14 plates, covering 31 deg square. Galaxies have been classified in the extended Hubble system, and group memberships have been assigned based on velocity (where available) and morphology. About half the galaxies listed are likely members of one of the nearby groups. The catalogs are complete to B(T) = 18, although the completeness limits vary slightly from group to group. Based on King model fits to the surface density profiles, the core radii of the groups range from 0.3 to 1 Mpc, and central densities range from 120 to 1900 galaxies Mpc exp-3 brighter than M(BT) = -12.5. Dynamical analysis indicates that all of the groups are likely to be gravitationally bound. 64 refs.

  9. SN 2008iy: an unusual Type IIn Supernova with an enduring 400-d rise time

    NASA Astrophysics Data System (ADS)

    Miller, A. A.; Silverman, J. M.; Butler, N. R.; Bloom, J. S.; Chornock, R.; Filippenko, A. V.; Ganeshalingam, M.; Klein, C. R.; Li, W.; Nugent, P. E.; Smith, N.; Steele, T. N.

    2010-05-01

    We present spectroscopic and photometric observations of the Type IIn supernova (SN) 2008iy. SN 2008iy showed an unprecedentedly long rise time of ~400 d, making it the first known SN to take significantly longer than 100 d to reach peak optical luminosity. The peak absolute magnitude of SN 2008iy was Mr ~ -19.1 mag, and the total radiated energy over the first ~700 d was ~2 × 1050 erg. Spectroscopically, SN 2008iy is very similar to the Type IIn SN 1988Z at late times and, like SN 1988Z, it is a luminous X-ray source (both SNe had an X-ray luminosity LX > 1041 ergs-1). SN 2008iy has a growing near-infrared excess at late times similar to several other SNe IIn. The Hα emission-line profile of SN 2008iy shows a narrow P Cygni absorption component, implying a pre-SN wind speed of ~100kms-1. We argue that the luminosity of SN 2008iy is powered via the interaction of the SN ejecta with a dense, clumpy circumstellar medium. The ~400-d rise time can be understood if the number density of clumps increases with distance over a radius ~1.7 × 1016cm from the progenitor. This scenario is possible if the progenitor experienced an episodic phase of enhanced mass loss <1 century prior to explosion or if the progenitor wind speed increased during the decades before core collapse. We favour the former scenario, which is reminiscent of the eruptive mass-loss episodes observed for luminous blue variable (LBV) stars. The progenitor wind speed and increased mass-loss rates serve as further evidence that at least some, and perhaps all, Type IIn SNe experience LBV-like eruptions shortly before core collapse. We also discuss the host galaxy of SN 2008iy, a subluminous dwarf galaxy, and offer a few reasons why the recent suggestion that unusual, luminous SNe preferentially occur in dwarf galaxies may be the result of observational biases.

  10. Hubble Space Telescope Proper Motion (HSTPROMO) Catalogs of Galactic Globular Clusters. IV. Kinematic Profiles and Average Masses of Blue Straggler Stars

    NASA Astrophysics Data System (ADS)

    Baldwin, A. T.; Watkins, L. L.; van der Marel, R. P.; Bianchini, P.; Bellini, A.; Anderson, J.

    2016-08-01

    We make use of the Hubble Space Telescope proper-motion catalogs derived by Bellini et al. to produce the first radial velocity dispersion profiles σ (R) for blue straggler stars (BSSs) in Galactic globular clusters (GCs), as well as the first dynamical estimates for the average mass of the entire BSS population. We show that BSSs typically have lower velocity dispersions than stars with mass equal to the main-sequence turnoff mass, as one would expect for a more massive population of stars. Since GCs are expected to experience some degree of energy equipartition, we use the relation σ \\propto {M}-η , where η is related to the degree of energy equipartition, along with our velocity dispersion profiles to estimate BSS masses. We estimate η as a function of cluster relaxation from recent Monte Carlo cluster simulations by Bianchini et al. and then derive an average mass ratio {M}{BSS}/{M}{MSTO}=1.50+/- 0.14 and an average mass {M}{BSS}=1.22+/- 0.12 M ⊙ from 598 BSSs across 19 GCs. The final error bars include any systematic errors that are random between different clusters, but not any potential biases inherent to our methodology. Our results are in good agreement with the average mass of {M}{BSS}=1.22+/- 0.06 M ⊙ for the 35 BSSs in Galactic GCs in the literature with properties that have allowed individual mass determination. Based on proprietary and archival observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555.

  11. Erratum: ``The ROSAT All-Sky Survey: A Catalog of Clusters of Galaxies in a Region of 1 Steradian around the South Galactic Pole'' (ApJS, 140, 239 [2002])

    NASA Astrophysics Data System (ADS)

    Cruddace, R.; Voges, W.; Böhringer, H.; Collins, C. A.; Romer, A. K.; MacGillivray, H.; Yentis, D.; Schuecker, P.; Ebeling, H.; De Grandi, S.

    2003-02-01

    There are errors in the count rates for 17 of the 186 clusters in the catalog (Table 3). The cause of the error, detected recently during comparison of the catalog with other data sources, was an infrequent software error not revealed during testing. We have reexamined all the data in Table 3 and verified that only the count rates of 17 clusters, and the derived values of temperature, energy flux, and luminosity, were affected. Further, we have recreated all the relevant figures and concluded that these errors had no significant effect on the findings and conclusions of the paper. The number of clusters in the complete sample with a flux limit of 3.0×10-12 ergs cm-2 s-1 in the 0.1-2.4 keV band is reduced from 112 to 110, of which 108 have redshifts. The table presented below is an extract from the print version of the catalog table (Table 3), in which we have corrected the X-ray count rate (col. [4]), temperature (col. [8]), energy flux (col. [9]), and luminosity (col. [10]) for these 17 clusters.

  12. 75 FR 27966 - Airworthiness Directives; The Boeing Company Model 747-400 and 747-400D Series Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-19

    ... certain Model 747-400 and 747-400D series airplanes. This proposed AD would ] require installing aluminum... November 4, 2009. The service bulletin describes procedures for installing aluminum gutter reinforcing... drip shield aluminum gutter, in accordance with Work Package 1 of the Accomplishment Instructions...

  13. Characterization of Fault Networks and Diffusion of Aftershock Epicenters From Earthquake Catalogs: Fuzzy C-means Clustering and a Modified ETAS Model

    NASA Astrophysics Data System (ADS)

    Moulik, P.; Tiampo, K. F.

    2009-05-01

    The information on three-dimensional geometry as well as the identification of active fault segments is critical to our assessment of seismic risks. Numerical modeling of the aftershock locations, times and magnitudes are also crucial to characterize a fault zone. In this study, a pattern recognition technique based on the Fuzzy C- means clustering algorithm (Bezdek, 1981) is proposed to allow each earthquake to be associated with different fault segments. The spatial covariance tensor for each cluster and the associated earthquakes are used to find optimal anisotropic clusters and designate them as faults, similar to the OADC method (Ouillon et al., 2008). The location, size and orientation of the reconstructed faults segments are characterized using a fuzzy covariance matrix (Gustafson and Kessel, 1978). The output consists of a set of distinct fault segments along with the associated earthquakes at different fuzzy membership grades (Zadeh, 1965). A resultant matrix consists of the fuzzy membership grade for different earthquakes and corresponding faults segments specifying their degree of association with values from zero to one. The spatial distribution of earthquakes of different magnitudes and membership grades for a fault segment is incorporated in an anisotropic spatial kernel which characterizes the aftershock density at a distance vector in the ETAS model (Kagan and Knopoff, 1987; Ogata, 1988). An optimal spatio-temporal distribution of aftershocks is obtained for each fault segment without considering a priori distributions such as Gaussian or power law (Helmstetter et al., 2006; Helmstetter and Sornette, 2002). The model is tested on the aftershock sequence from the Denali, 2002 earthquake in Alaska and the fault reconstruction results compared with the known faults in the area. Therefore, a new method to incorporate the anisotropic nature of aftershock diffusion along with the reconstruction of fault networks from seismicity catalogs is formulated in

  14. A New Catalog of Homogenized Absorption Line Indices for Milky Way Globular Clusters from High-resolution Integrated Spectroscopy

    NASA Astrophysics Data System (ADS)

    Kim, Hak-Sub; Cho, Jaeil; Sharples, Ray M.; Vazdekis, Alexandre; Beasley, Michael A.; Yoon, Suk-Jin

    2016-12-01

    We perform integrated spectroscopy of 24 Galactic globular clusters (GGCs). Spectra are observed from one core radius for each cluster with a high wavelength resolution of ˜2.0 Å FWHM. In combination with two existing data sets from Puzia et al. and Schiavon et al., we construct a large database of Lick spectral indices for a total of 53 GGCs with a wide range of metallicities, -2.4 ≲ [Fe/H] ≲ 0.1, and various horizontal-branch morphologies. The empirical index-to-metallicity conversion relationships are provided for the 20 Lick indices for the use of deriving metallicities for remote, unresolved stellar systems.

  15. VizieR Online Data Catalog: CLASH-VLT: the FF cluster MACS J0416.1-2403 (Balestra+, 2016)

    NASA Astrophysics Data System (ADS)

    Balestra, I.; Mercurio, A.; Sartoris, B.; Girardi, M.; Grillo, C.; Nonino, M.; Rosati, P.; Biviano, A.; Ettori, S.; Forman, W.; Jones, C.; Koekemoer, A.; Medezinski, E.; Merten, J.; Ogrean, G. A.; Tozzi, P.; Umetsu, K.; Vanzella, E.; van Weeren, R. J.; Zitrin, A.; Annunziatella, M.; Caminha, G. B.; Broadhurst, T.; Coe, D.; Donahue, M.; Fritz, A.; Frye, B.; Kelson, D.; Lombardi, M.; Maier, C.; Meneghetti, M.; Monna, A.; Postman, M.; Scodeggio, M.; Seitz, S.; Ziegler, B.

    2016-07-01

    The cluster MACS J0416.1-2403 was observed between 2012 December and 2014 November as part of the ESO Large Programme 186.A-0798 "Dark Matter Mass Distributions of Hubble Treasury Clusters and the Foundations of ΛCDM Structure Formation Models" (P.I.: Piero Rosati) using VIMOS at the ESO VLT. A total of 21 masks were observed (15 LR-Blue (low-resolution) masks and 6 MR (medium-resolution) masks). The LR-Blue masks cover the spectral range 3700-6700Å with a resolution of R=180, while the MR masks cover the range 4800-10000Å with a resolution of R=580. The massive cluster has been observed with the Hubble Space Telescope (HST) as part of the Multi-Cycle Treasury program Cluster Lensing And Supernova survey with Hubble (CLASH; P.I.: M. Postman; Postman et al. 2012, J/ApJS/199/25). The HST survey is nicely complemented by Subaru wide-field imaging. (3 data files).

  16. VizieR Online Data Catalog: UBV(RI)c photometry of 6 open clusters (Glushkova+, 2013)

    NASA Astrophysics Data System (ADS)

    Glushkova, E. V.; Zabolotskikh, M. V.; Koposov, S. E.; Spiridonova, O. I.; Leonova, S. I.; Vlasyuk, V. V.; Rastorguev, A. S.

    2014-03-01

    We observed six open clusters in the Johnson/Kron-Cousins broad band BVRcIc using the Zeiss-1000 telescope at the Special Astrophysical Observatory of the Russian Academy of Sciences equipped with a photometer based on an EEV 42-40 2Kx2K CCD. (6 data files).

  17. VizieR Online Data Catalog: Photometry in cluster 2158+0351 at z=0.45 (Molinari+ 1990)

    NASA Astrophysics Data System (ADS)

    Molinari, E.; Buzzoni, A.; Chincarini, G.

    1993-03-01

    Results of detailed 3-colour photometry of the distant cluster 2158+0351 (z=0.445) are presented. The photometry was produced using the INVENTORY package. The Gunn g, r, i magnitudes were measureed, down to r = 23.5, with a typical error of 0.1mag. (1 data file).

  18. VizieR Online Data Catalog: CaIIK spectra of 7 Galactic and MC open clusters (Smoker+, 2015)

    NASA Astrophysics Data System (ADS)

    Smoker, J.; Keenan, F. P.; Fox, A. J.

    2015-07-01

    The data on which the current paper is based were extracted from the ESO archive and are FLAMES-GIRAFFE observations towards three open clusters located in the Milky Way, and two in each of the Large and Small Magellanic Clouds, plus FEROS and UVES observations towards stars located in the Magellanic system and Milky Way. (18 data files).

  19. VizieR Online Data Catalog: X-ray cavities from isolated gal. to clusters (Shin+, 2016)

    NASA Astrophysics Data System (ADS)

    Shin, J.; Woo, J.-H.; Mulchaey, J. S.

    2017-01-01

    To search X-ray cavities, we used available Chandra X-ray images, which provide high spatial resolution (PSF FWHM ~0.5" at the aim point). We considered sources in the Chandra archive in one of three categories, namely, "normal galaxies", "cluster of galaxies", and "active galaxies and quasar". For our cavity study, we used a final sample of 133 targets based on a consistent analysis of X-ray photon counts. (2 data files).

  20. VizieR Online Data Catalog: CCD {Delta}a-photometry of 5 open clusters (Paunzen+, 2003)

    NASA Astrophysics Data System (ADS)

    Paunzen, E.; Pintado, O. I.; Maitzen, H. M.

    2004-01-01

    Observations of the five open clusters were performed with the Bochum 61cm (ESO-La Silla), the Helen-Sawyer-Hogg 61cm telescope (UTSO-Las Campanas Observatory), the 2.15m telescope at the Complejo Astronomico el Leoncito (CASLEO) and the L. Figl Observatory (FOA) with the 150cm telescope on Mt. Schopfl (Austria) using the multimode instrument OEFOSC (see the observation log in Table 1). (5 data files).

  1. VizieR Online Data Catalog: RV and [Fe/H] in 5 open clusters (Carrera+, 2015)

    NASA Astrophysics Data System (ADS)

    Carrera, R.; Casamiquela, L.; Ospina, N.; Balaguer-Nunez, L.; Jordi, C.; Monteagudo, L.

    2015-05-01

    Medium-resolution spectra in the region of the near-infrared CaII triplet (CaT) at ~8500Å were obtained using the Intermediate Dispersion Spectrograph (IDS) mounted at the Cassegrain focus of the 2.5m Isaac Newton Telescope (INT) located at Roque de los Muchachos Observatory, Spain. Berkeley 23 was observed in service mode on 2013 January 17 and 18, and the other clusters were observed on 2014 July 18 and 19. (1 data file).

  2. VizieR Online Data Catalog: Chandra X-Ray galaxy clusters at z <1.4 (Babyk+, 2014)

    NASA Astrophysics Data System (ADS)

    Babyk, Yu. V.; Del Popolo, A.; Vavilova, I. B.

    2014-10-01

    A reconstruction of the total mass (the fraction of dark matter, intercluster gas, and the brightest galaxy of the cluster) of 128 X-ray galaxy clusters at redshifts 0.01-1.4 based on Chandra observations is presented. The total mass M200 and the baryonic mass Mb have been measured for all the sample objects, as well as the concentration parameter c200, which characterizes the size of the dark matter halo. The existence of a tight correlation between c200 and M200 is confirmed, c{prop.to}Mavir/(1+z)b with a=-0.56+/-0.15 and b=0.80+/-0.25 (95% confidence level), in good agreement with the predictions of numerical simulations and previous observations. Fitting the inner dark-matter density slope α with a generalized NFW model yields α=1.10+/-0.48 at the 2σ confidence level, combining the results for the entire sample, for which the model gives a good description of the data. There is also a tight correlation between the inner slope of the dark-matter density profile α and the baryonic mass contentMb for massive galaxy clusters, namely, α decreases with increasing baryonic mass content. A simple power-law model is used to fit the α-Mb distributions, yielding the break point for the inner slope of the dark-matter density profile b=1.72+/-0.37 (68% confidence level). (3 data files).

  3. VizieR Online Data Catalog: Nine new open clusters within 500pc from the Sun (Roser+, 2016)

    NASA Astrophysics Data System (ADS)

    Roser, S.; Schilbach, E.; Goldman, B.

    2017-03-01

    We used URAT1 (Zacharias et al., 2015, Cat. I/329) to improve the Tycho-2 proper motions and to test what proper motions, which are more precise than those of Tycho-2 (Hog et al., 2000, Cat. I/259), can do for open cluster studies. URAT1 contains 228 million objects down to about R=18.5 mag, north of about -20° declination. For the bulk of the Tycho-2 stars, URAT1 gives positions at a mean epoch around 2013.5 and an accuracy level of about 20mas per co-ordinate. We cross-matched URAT1 with Tycho-2 (the original data set tyc2.dat from CDS), and obtained new proper motions via a least-squares adjustment as described, for example in PPMXL (Roeser et al., 2010, Cat. I/317). To avoid formally ultra-precise astrometry for a small number of stars, we chose a 10mas floor for the precision of a URAT1 position. The newly detected clusterings are located in the solar neighbourhood at distances below 500pc from the Sun. The candidates RSG1 to RSG8 are very probably genuine physical groups. Membership and astrophysical parameters could be determined sufficiently well. Nevertheless, accurate parallaxes of at least several reliable cluster stars could improve the quality of parameter determination. A definite age cannot be derived for RSG9; this critically depends on the secure membership status of the two brightest stars. Table 1 summarises the astrophysical parameters of the newly found objects. (1 data file).

  4. VizieR Online Data Catalog: JHKs photometry of T2Cs in globular clusters (Matsunaga+, 2006)

    NASA Astrophysics Data System (ADS)

    Matsunaga, N.; Fukushi, H.; Nakada, Y.; Tanabe, T.; Feast, M. W.; Menzies, J. W.; Ita, Y.; Nishiyama, S.; Baba, D.; Naoi, T.; Nakaya, H.; Kawadu, T.; Ishihara, A.; Kato, D.

    2006-11-01

    Data for type II Cepheids (T2Cs) were obtained during our project to observe variables of various types in globular clusters. We used the Infrared Survey Facility (IRSF) 1.4-m telescope and the Simultaneous 3-Colour Imager for Unbiased Survey (SIRIUS) near-infrared camera constructed by Nagoya University and the National Astronomical Observatory of Japan, and sited at the Sutherland station of the South African Astronomical Observatory. Images of a 7.7x7.7arcmin2 field of view are obtained simultaneously in JHKs. The seeing size was typically 1.5arcsec. (2 data files).

  5. VizieR Online Data Catalog: 3XMM/SDSS Stripe 82 Galaxy Cluster Survey. I. (Takey+, 2016)

    NASA Astrophysics Data System (ADS)

    Takey, A.; Durret, F.; Mahmoud, E.; Ali, G.

    2016-06-01

    The 3XMM/SDSS Stripe 82 cluster survey is mainly based on the XMM X-ray serendipitous source catalogue. The latest version of the catalogue, 3XMM-DR5, was released on 2015 April 28. The 3XMM-DR5 catalogue contains 565962 X-ray detections comprising 396910 X-ray sources, which were detected in 7781 EPIC (PN, MOS1, MOS2) observations made public on/or before 2013 December 31. These observations cover 877deg2 of the sky (Rosen et al. 2016A&A...590A...1R, Cat. IX/46). (4 data files).

  6. VizieR Online Data Catalog: Galaxy clusters discovered in the SPT-SZ survey (Bleem+, 2015)

    NASA Astrophysics Data System (ADS)

    Bleem, L. E.; Stalder, B.; de Haan, T.; Aird, K. A.; Allen, S. W.; Applegate, D. E.; Ashby, M. L. N.; Bautz, M.; Bayliss, M.; Benson, B. A.; Bocquet, S.; Brodwin, M.; Carlstrom, J. E.; Chang, C. L.; Chiu, I.; Cho, H. M.; Clocchiatti, A.; Crawford, T. M.; Crites, A. T.; Desai, S.; Dietrich, J. P.; Dobbs, M. A.; Foley, R. J.; Forman, W. R.; George, E. M.; Gladders, M. D.; Gonzalez, A. H.; Halverson, N. W.; Hennig, C.; Hoekstra, H.; Holder, G. P.; Holzapfel, W. L.; Hrubes, J. D.; Jones, C.; Keisler, R.; Knox, L.; Lee, A. T.; Leitch, E. M.; Liu, J.; Lueker, M.; Luong-van, D.; Mantz, A.; Marrone, D. P.; McDonald, M.; McMahon, J. J.; Meyer, S. S.; Mocanu, L.; Mohr, J. J.; Murray, S. S.; Padin, S.; Pryke, C.; Reichardt, C. L.; Rest, A.; Ruel, J.; Ruhl, J. E.; Saliwanchik, B. R.; Saro, A.; Sayre, J. T.; Schaffer, K. K.; Schrabback, T.; Shirokoff, E.; Song, J.; Spieler, H. G.; Stanford, S. A.; Staniszewski, Z.; Stark, A. A.; Story, K. T.; Stubbs, C. W.; Vanderlinde, K.; Vieira, J. D.; Vikhlinin, A.; Williamson, R.; Zahn, O.; Zenteno, A.

    2015-03-01

    The South Pole Telescope (SPT) is a 10m diameter telescope located at the National Science Foundation Amundsen-Scott South Pole station in Antarctica. From 2008 to 2011 the telescope was used to conduct the SPT-SZ survey, a survey of ~2500deg2 of the southern sky at 95, 150, and 220GHz. The survey covers a contiguous region from 20h to 7h in right ascension (R.A.) and -65 to -40° in declination (see, e.g., Figure 1 in Story et al. 2013ApJ...779...86S) and was mapped to depths of approximately 40, 18, and 70uK-arcmin at 95, 150, and 220GHz respectively. We use optical and in some cases NIR imaging (Blanco Telescope, Magellan/Baade, Magellan/Clay, Swope, MPG/ESO, New Technology Telescope, Spitzer, WISE) to confirm candidates as clusters and to obtain redshifts for confirmed systems (see section 4). We have also used a variety of facilities to obtain spectroscopic observations of SPT clusters (including VLT/FORS2 & Gemini/GMOS-S). (3 data files).

  7. VizieR Online Data Catalog: O, Na, Ba and Eu abundances in open clusters (MacLean+, 2015)

    NASA Astrophysics Data System (ADS)

    MacLean, B. T.; De Silva, G. M.; Lattanzio, J.

    2015-06-01

    We sourced high-resolution spectroscopic abundances of Na and O as well as Ba and Eu in Galactic OCs from the literature, in order to gather the largest sample size possible. If a study did not measure either pair of these elements, it was not included in our sample. To minimize systematic effects and ensure a high level of abundance accuracy, we limited our data set to studies based on a minimum spectral resolution of R=20000. Due to the fact that the anticorrelations in GCs and chemical homogeneity in OCs are observed as star-to-star abundance variations, we originally limited our OC sample to clusters where a total of five or more individual stellar abundances were available. (3 data files).

  8. 75 FR 3147 - Airworthiness Directives; The Boeing Company Model 747-100B SUD, -200B, -300, -400, and -400D...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-20

    ... Model 747-100B SUD, -200B, -300, -400, and -400D Series Airplanes AGENCY: Federal Aviation... existing airworthiness directive (AD), which applies to certain Model 747-100B SUD, -200B, -300, -400, and..., -200B, -300, -400, and -400D series airplanes. That NPRM was published in the Federal Register on...

  9. The Chandra Source Catalog: Processing and Infrastructure

    NASA Astrophysics Data System (ADS)

    Evans, Janet; Evans, Ian N.; Glotfelty, Kenny J.; Hain, Roger; Hall, Diane M.; Miller, Joseph B.; Plummer, David A.; Zografou, Panagoula; Primini, Francis A.; Anderson, Craig S.; Bonaventura, Nina R.; Chen, Judy C.; Davis, John E.; Doe, Stephen M.; Fabbiano, Giuseppina; Galle, Elizabeth C.; Gibbs, Danny G., II; Grier, John D.; Harbo, Peter N.; He, Xiang Qun (Helen); Houck, John C.; Karovska, Margarita; Kashyap, Vinay L.; Lauer, Jennifer; McCollough, Michael L.; McDowell, Jonathan C.; Mitschang, Arik W.; Morgan, Douglas L.; Mossman, Amy E.; Nichols, Joy S.; Nowak, Michael A.; Refsdal, Brian L.; Rots, Arnold H.; Siemiginowska, Aneta L.; Sundheim, Beth A.; Tibbetts, Michael S.; van Stone, David W.; Winkelman, Sherry L.

    2009-09-01

    Chandra Source Catalog processing recalibrates each observation using the latest available calibration data, and employs a wavelet-based source detection algorithm to identify all the X-ray sources in the field of view. Source properties are then extracted from each detected source that is a candidate for inclusion in the catalog. Catalog processing is completed by matching sources across multiple observations, merging common detections, and applying quality assurance checks. The Chandra Source Catalog processing system shares a common processing infrastructure and utilizes much of the functionality that is built into the Standard Data Processing (SDP) pipeline system that provides calibrated Chandra data to end-users. Other key components of the catalog processing system have been assembled from the portable CIAO data analysis package. Minimal new software tool development has been required to support the science algorithms needed for catalog production. Since processing pipelines must be instantiated for each detected source, the number of pipelines that are run during catalog construction is a factor of order 100 times larger than for SDP. The increased computational load, and inherent parallel nature of the processing, is handled by distributing the workload across a multi-node Beowulf cluster. Modifications to the SDP automated processing application to support catalog processing, and extensions to Chandra Data Archive software to ingest and retrieve catalog products, complete the upgrades to the infrastructure to support catalog processing.

  10. The Chandra Source Catalog: Processing and Infrastructure

    NASA Astrophysics Data System (ADS)

    Evans, Janet; Evans, I. N.; Glotfelty, K. J.; Hain, R.; Hall, D. M.; Miller, J. B.; Plummer, D. A.; Zografou, P.

    2009-01-01

    Chandra Source Catalog processing recalibrates each observation using the latest available calibration data, and employs a wavelet-based source detection algorithm to identify all the X-ray sources in the field of view. Source properties are then extracted from each detected source that is a candidate for inclusion in the catalog. Catalog processing is completed by matching sources across multiple observations, merging common detections, and applying quality assurance checks. The Chandra Source Catalog processing system shares a common processing infrastructure and utilizes much of the functionality that is built into the Standard Data Processing (SDP) pipeline system that provides calibrated Chandra data to end-users. Other key components of the catalog processing system have been assembled from the portable CIAO data analysis package. Minimal new software tool development has been required to support the science algorithms needed for catalog production. Since processing pipelines must be instantiated for each detected source, the number of pipelines that are run during catalog construction is a factor of order 100 times larger than for SDP. The increased computational load, and inherent parallel nature of the processing, is handled by distributing the workload across a multi-node Beowulf cluster. Modifications to the SDP automated processing application to support catalog processing, and extensions to Chandra Data Archive software to ingest and retrieve catalog products, complete the upgrades to the infrastructure to support catalog processing. The end product is a catalog of Chandra sources, associated catalog user interfaces, and forthcoming data analysis tools, that will allow users to query the catalog, retrieve relevant data, and perform interactive scientific analysis on those results. This work is supported by NASA contract NAS8-03060 (CXC).

  11. Constraining the Scatter in the Mass-Richness Relation of maxBCG Clusters With Weak Lensing and X-ray Data

    SciTech Connect

    Rozo, Eduardo; Rykoff, Eli S.; Evrard, August; Becker, Matthew R.; McKay, Timothy; Wechsler, Risa H.; Koester, Benjamin P.; Hao, Jiangang; Hansen, Sarah; Sheldon, Erin; Johnston, David; Annis, James T.; Frieman, Joshua A.; /Chicago U. /KICP, Chicago /Fermilab

    2009-08-03

    We measure the logarithmic scatter in mass at fixed richness for clusters in the maxBCG cluster catalog, an optically selected cluster sample drawn from SDSS imaging data. Our measurement is achieved by demanding consistency between available weak lensing and X-ray measurements of the maxBCG clusters, and the X-ray luminosity-mass relation inferred from the 400d X-ray cluster survey, a flux limited X-ray cluster survey. We find {sigma}{sub lnM|N{sub 200}} = 0.45{sub -0.18}{sup +0.20} (95%CL) at N{sub 200} {approx} 40, where N{sub 200} is the number of red sequence galaxies in a cluster. As a byproduct of our analysis, we also obtain a constraint on the correlation coefficient between lnL{sub X} and lnM at fixed richness, which is best expressed as a lower limit, r{sub L,M|N} {ge} 0.85 (95% CL). This is the first observational constraint placed on a correlation coefficient involving two different cluster mass tracers. We use our results to produce a state of the art estimate of the halo mass function at z = 0.23 - the median redshift of the maxBCG cluster sample - and find that it is consistent with the WMAP5 cosmology. Both the mass function data and its covariance matrix are presented.

  12. Mars landing site catalog

    NASA Technical Reports Server (NTRS)

    Greeley, Ronald (Editor)

    1990-01-01

    The catalog was compiled from material provided by the planetary community for areas on Mars that are of potential interest for future exploration. The catalog has been edited for consistency insofar as practical; however, the proposed scientific objectives and characteristics have not been reviewed. This is a working catalog that is being revised, updated, and expanded continually.

  13. Arabic Online Catalog.

    ERIC Educational Resources Information Center

    Khurshid, Zahiruddin

    1992-01-01

    Discusses the processing of Arabic materials at the King Fahd University of Petroleum and Minerals (Saudi Arabia) library and describes the creation of an Arabic online catalog that supplements the catalog for non-Arabic materials. User needs are reviewed, library automation is discussed, and search strategies in the Arabic catalog are described.…

  14. Automation and Cataloging.

    ERIC Educational Resources Information Center

    Furuta, Kenneth; And Others

    1990-01-01

    These three articles address issues in library cataloging that are affected by automation: (1) the impact of automation and bibliographic utilities on professional catalogers; (2) the effect of the LASS microcomputer software on the cost of authority work in cataloging at the University of Arizona; and (3) online subject heading and classification…

  15. REDSHIFTS, SAMPLE PURITY, AND BCG POSITIONS FOR THE GALAXY CLUSTER CATALOG FROM THE FIRST 720 SQUARE DEGREES OF THE SOUTH POLE TELESCOPE SURVEY

    SciTech Connect

    Song, J.; Zenteno, A.; Desai, S.; Bazin, G.; Stalder, B.; Ashby, M. L. N.; Bayliss, M.; Bleem, L. E.; Benson, B. A.; Carlstrom, J. E.; Chang, C. L.; Crawford, T. M.; Crites, A. T.; Aird, K. A.; Armstrong, R.; Bertin, E.; Brodwin, M.; Cho, H. M.; Clocchiatti, A.; De Haan, T.; and others

    2012-12-10

    We present the results of the ground- and space-based optical and near-infrared (NIR) follow-up of 224 galaxy cluster candidates detected with the Sunyaev-Zel'dovich (SZ) effect in the 720 deg{sup 2} of the South Pole Telescope (SPT) survey completed in the 2008 and 2009 observing seasons. We use the optical/NIR data to establish whether each candidate is associated with an overdensity of galaxies and to estimate the cluster redshift. Most photometric redshifts are derived through a combination of three different cluster redshift estimators using red-sequence galaxies, resulting in an accuracy of {Delta}z/(1 + z) = 0.017, determined through comparison with a subsample of 57 clusters for which we have spectroscopic redshifts. We successfully measure redshifts for 158 systems and present redshift lower limits for the remaining candidates. The redshift distribution of the confirmed clusters extends to z = 1.35 with a median of z{sub med} = 0.57. Approximately 18% of the sample with measured redshifts lies at z > 0.8. We estimate a lower limit to the purity of this SPT SZ-selected sample by assuming that all unconfirmed clusters are noise fluctuations in the SPT data. We show that the cumulative purity at detection significance {xi} > 5({xi} > 4.5) is {>=}95% ({>=}70%). We present the red brightest cluster galaxy (rBCG) positions for the sample and examine the offsets between the SPT candidate position and the rBCG. The radial distribution of offsets is similar to that seen in X-ray-selected cluster samples, providing no evidence that SZ-selected cluster samples include a different fraction of recent mergers from X-ray-selected cluster samples.

  16. Spectroscopy of galaxies in distant clusters. IV - A catalog of photometry and spectroscopy for galaxies in seven clusters with z in the range of 0.35 to 0.55

    NASA Technical Reports Server (NTRS)

    Dressler, Alan; Gunn, James E.

    1992-01-01

    Photometry and spectroscopy for seven deep fields containing distant clusters of galaxies with z in the range of 0.35 to 0.55 are presented. Positions and photometric parameters, including r-magnitudes g - r and r - i colors, surface brightnesses, and photometric profile types are given for about 2000 galaxies. Low-resolution spectroscopy is obtained from which redshifts are determined for 289 objects, of which 190 are cluster members. These are classified according to dominant spectral features, and examples are plotted in each cluster. Color-magnitude and color-color diagrams are formed which show trends in the cluster populations, and maps are made of the cluster field using the color-color relations to increase the contrast of cluster over field. Galaxies with spectra typical of old stellar populations cluster most strongly, with active galaxies, those with recent or ongoing star formation, or an active nucleus, distributed more diffusely. The g - r color is well correlated with active star formation as judged from spectral features.

  17. Federating Metadata Catalogs

    NASA Astrophysics Data System (ADS)

    Baru, C.; Lin, K.

    2009-04-01

    The Geosciences Network project (www.geongrid.org) has been developing cyberinfrastructure for data sharing in the Earth Science community based on a service-oriented architecture. The project defines a standard "software stack", which includes a standardized set of software modules and corresponding service interfaces. The system employs Grid certificates for distributed user authentication. The GEON Portal provides online access to these services via a set of portlets. This service-oriented approach has enabled the GEON network to easily expand to new sites and deploy the same infrastructure in new projects. To facilitate interoperation with other distributed geoinformatics environments, service standards are being defined and implemented for catalog services and federated search across distributed catalogs. The need arises because there may be multiple metadata catalogs in a distributed system, for example, for each institution, agency, geographic region, and/or country. Ideally, a geoinformatics user should be able to search across all such catalogs by making a single search request. In this paper, we describe our implementation for such a search capability across federated metadata catalogs in the GEON service-oriented architecture. The GEON catalog can be searched using spatial, temporal, and other metadata-based search criteria. The search can be invoked as a Web service and, thus, can be imbedded in any software application. The need for federated catalogs in GEON arises because, (i) GEON collaborators at the University of Hyderabad, India have deployed their own catalog, as part of the iGEON-India effort, to register information about local resources for broader access across the network, (ii) GEON collaborators in the GEO Grid (Global Earth Observations Grid) project at AIST, Japan have implemented a catalog for their ASTER data products, and (iii) we have recently deployed a search service to access all data products from the EarthScope project in the US

  18. HOMOGENEOUS CATALOGS OF EARTHQUAKES*

    PubMed Central

    Knopoff, Leon; Gardner, J. K.

    1969-01-01

    The usual bias in earthquake catalogs against shocks of small magnitudes can be removed by testing the randomness of the magnitudes of successive shocks. The southern California catalog, 1933-1967, is found to be unbiased in the sense of the test at magnitude 4 or above; the cutoff is improved to M = 3 for the subcatalog 1953-1967. PMID:16578700

  19. The Eppelsheimer Subject Catalog

    ERIC Educational Resources Information Center

    Stevenson, Gordon

    1971-01-01

    Since 1945, a method of catalog classification, originally devised by H.W. Eppelsheimer for the Mainz City Library, has found wide acceptance. It is a complex of catalogs which combines features of both subject classification and alphabetical subject indexing. (25 references) (Author/NH)

  20. MDS MIC Catalog Inputs

    NASA Technical Reports Server (NTRS)

    Johnson-Throop, Kathy A.; Vowell, C. W.; Smith, Byron; Darcy, Jeannette

    2006-01-01

    This viewgraph presentation reviews the inputs to the MDS Medical Information Communique (MIC) catalog. The purpose of the group is to provide input for updating the MDS MIC Catalog and to request that MMOP assign Action Item to other working groups and FSs to support the MITWG Process for developing MIC-DDs.

  1. Decision Points in Cataloging.

    ERIC Educational Resources Information Center

    Bright, Franklyn F.

    Libraries are frequently faced with policy decisions which can affect the quality and cost of library services for years to come. This point can be illustrated by citing examples of decisions made at the University of Wisconsin Library in the areas of: (1) conforming to national cataloging standards; (2) producing catalog cards in-house; and (3)…

  2. Catalog of Research Reports

    ERIC Educational Resources Information Center

    College Board, 2011

    2011-01-01

    This catalog lists research reports, research notes, and other publications available from the College Board's website. The catalog briefly describes research publications available free of charge. Introduced in 1981, the Research Report series includes studies and reviews in areas such as college admission, special populations, subgroup…

  3. Enriching the Catalog

    ERIC Educational Resources Information Center

    Tennant, Roy

    2004-01-01

    After decades of costly and time-consuming effort, nearly all libraries have completed the retrospective conversion of their card catalogs to electronic form. However, bibliographic systems still are really not much more than card catalogs on wheels. Enriched content that Amazon.com takes for granted--such as digitized tables of contents, cover…

  4. VizieR Online Data Catalog: HST/ACS color-magnitude diagrams of candidate intermediate-age M 31 globular clusters. The role of blue horizontal branches.

    NASA Astrophysics Data System (ADS)

    Perina, S.; Galleti, S.; Fusi Pecci, F.; Bellazzini, M.; Federici, L.; Buzzoni, A.

    2011-10-01

    Tables b058.dat, b292_531.dat, b350.dat, b336.dat, b337.dat present the photometry of the individual stars of six M31 globular clusters. The observations were carried out with the ACS on board of the HST, employing the WFC+F435W/F606W filters. The data reduction has been performed using the ACS module of DOLPHOT, a point spread function-fitting package specifically devoted to the photometry of HST data, that provides as output the magnitudes and the pixel positions of the detected sources, and a number of quality parameters for a suitable sample selection. The tables present, for the chip holding the cluster, all the stars with valid measurements in both passbands, global quality flag=1, crowding parameter <0.5, chi-square parameter <2.5 and sharpness parameter between -0.3 and 0.3. The x,y coordinates, the magnitudes in the Vegamag system, the errors on the magnitudes and the ACS_WFC chip number are listed for each of the selected stars. (6 data files).

  5. NASA climate data catalog

    NASA Technical Reports Server (NTRS)

    Reph, M. G.

    1984-01-01

    This document provides a summary of information available in the NASA Climate Data Catalog. The catalog provides scientific users with technical information about selected climate parameter data sets and the associated sensor measurements from which they are derived. It is an integral part of the Pilot Climate Data System (PCDS), an interactive, scientific management system for locating, obtaining, manipulating, and displaying climate research data. The catalog is maintained in a machine readable representation which can easily be accessed via the PCDS. The purposes, format and content of the catalog are discussed. Summarized information is provided about each of the data sets currently described in the catalog. Sample detailed descriptions are included for individual data sets or families of related data sets.

  6. VizieR Online Data Catalog: GUViCS. Ultraviolet Source Catalogs (Voyer+, 2014)

    NASA Astrophysics Data System (ADS)

    Voyer, E. N.; Boselli, A.; Boissier, S.; Heinis, S.; Cortese, L.; Ferrarese, L.; Cote, P.; Cuillandre, J.-C.; Gwyn, S. D. J.; Peng, E. W.; Zhang, H.; Liu, C.

    2014-07-01

    These catalogs are based on GALEX NUV and FUV source detections in and behind the Virgo Cluster. The detections are split into catalogs of extended sources and point-like sources. The UV Virgo Cluster Extended Source catalog (UV_VES.fit) provides the deepest and most extensive UV photometric data of extended galaxies in Virgo to date. If certain data is not available for a given source then a null value is entered (e.g. -999, -99). UV point-like sources are matched with SDSS, NGVS, and NED and the relevant photometry and further data from these databases/catalogs are provided in this compilation of catalogs. The primary GUViCS UV Virgo Cluster Point-Like Source catalog is UV_VPS.fit. This catalog provides the most useful GALEX pipeline NUV and FUV photometric parameters, and categorizes sources as stars, Virgo members, and background sources, when possible. It also provides identifiers for optical matches in the SDSS and NED, and indicates if a match exists in the NGVS, only if GUViCS-optical matches are one-to-one. NED spectroscopic redshifts are also listed for GUViCS-NED one-to-one matches. If certain data is not available for a given source a null value is entered. Additionally, the catalog is useful for quick access to optical data on one-to-one GUViCS-SDSS matches.The only parameter available in the catalog for UV sources that have multiple SDSS matches is the total number of multiple matches, i.e. SDSSNUMMTCHS. Multiple GUViCS sources matched to the same SDSS source are also flagged given a total number of matches, SDSSNUMMTCHS, of one. All other fields for multiple matches are set to a null value of -99. In order to obtain full optical SDSS data for multiply matched UV sources in both scenarios, the user can cross-correlate the GUViCS ID of the sources of interest with the full GUViCS-SDSS matched catalog in GUV_SDSS.fit. The GUViCS-SDSS matched catalog, GUV_SDSS.fit, provides the most relevant SDSS data on all GUViCS-SDSS matches, including one

  7. Catalog Production for the DES Blind Cosmology Challenge

    NASA Astrophysics Data System (ADS)

    Busha, Michael T.; Wechsler, R. H.; Becker, M. R.; Erickson, B.; Evrard, A. E.

    2013-01-01

    The Blind Cosmology Challenge (BCC) is an effort by the Dark Energy Survey (DES) to test analysis tools for extracting cosmological information using a set of detailed synthetic galaxy catalogs. Here, we describe the creation of these synthetic sky catalogs based on requirements of the optical (DES) and the near-IR VISTA Hemisphere Survey, producing catalogs covering a quarter of the sky to z ˜ 2, with sources complete to r ˜ 25. Starting with a nested set of lightcone outputs of large, N-body simulation, galaxies are assigned to the dark matter distribution using an empirical algorithm that is tunable to match observed evolution of low-order galaxy population properties (counts and spatial clustering) in luminosity-color-density space. Galaxies are lensed by matter along the line of sight (including magnification, shape distortion, and multiple images), using a new algorithm that calculates shear with 3.22 arcsec resolution at galaxy positions in the full catalog. The catalog is well suited to support DES+VISTA joint studies of galaxy clustering, groups and clusters of galaxies, and gravitational lensing, and we highlight their application to the ongoing DES BBCC. Catalogs include ˜320 million galaxies and ˜150 million stars, with realistic colors, shapes and photometric errors. Using the expected DES photometric errors, three independent photometric redshift codes are run on the catalog, two of which produce full probability distributions. The synthetic observable catalog includes object position, magnitudes in the DES and VISTA bands, photometric errors, photometric redshifts, size, ellipticity, for each of ˜ 500 million objects. The galaxy distribution is additionally masked appropriately for the 5000 square degree DES footprint, including the impact of bright stars. In addition, we offer separate catalogs with magnitudes for additional existing and planned surveys, including SDSS, CFHTLS, HSC, LSST, and Euclid.

  8. The guide star catalog

    NASA Technical Reports Server (NTRS)

    Lasker, Barry M.; Jenkner, Helmut; Russell, Jane L.

    1987-01-01

    Part 1 of the catalog presents an astronomical overview of the Guide Star Catalog, together with its history, the properties of its current implementation, and the prospects for enhancement. Part 2 presents the algorithms used in photometric and astrometric calibration of the catalog, as well as the analyses of the related errors. Part 3 presents the current structure and content, as well as future enhancements in this area. An overview of the forthcoming publications is given, both with regard to scientific papers and electronic media.

  9. HS3 Data Catalog

    NASA Technical Reports Server (NTRS)

    Emory, Amber Elizabeth; Chirica, Dan Cristian; Doyle, Jim

    2013-01-01

    This presentation covered the original plan for the Hurricane and Severe Storm Sentinel (HS3) Data Catalog available through the ESPO HS3 mission page (http://espo.nasa.gov/missions/hs3/) and provided examples of Model Products, Operational Products, and Research (Instrument) Products from the 2012 field campaign. The presentation also covered lessons learned and suggested improvements to the Data Catalog for the upcoming 2013 HS3 field campaign.

  10. Boo! Outsourcing from the Cataloging Perspective.

    ERIC Educational Resources Information Center

    Hill, Janet Swan

    1998-01-01

    Examines long-accepted ways library cataloging departments have used outsourcing (cataloging records, card production, authority control, card filling, and retrospective conversion) and potential outsourcing activities (original cataloging, and copy cataloging). Discusses reasons why outsourcing is controversial. (PEN)

  11. Prologue for a synoptic catalog: combining a hospital library catalog and a bookseller's catalog.

    PubMed Central

    Colglazier, M L

    1996-01-01

    This article introduces the synoptic catalog, a computerized combination of a hospital library catalog and a bookseller's catalog. Majors Scientific Books and Richmond Memorial Hospital Libraries in Virginia collaborated to develop the model. A logical evolution in catalog theory and practice, the design expands the identification, collocation, and evaluation functions of the traditional library catalog. This article explains the procedures and specifications, including system requirements, record mapping, design details, scope, record transmission, timing, record importing, and file maintenance. The result is a single-interface catalog providing simultaneous and consistent searching of combined information databases. Bookseller records in the synoptic catalog can be modified to indicate library ownership. The synoptic catalog design supports cost-effective collection development and focuses on actual information needs of library users. This report discusses user convenience, budget requirements, publisher advertising, collection development, productivity, and library-bookseller relations. User response to the catalog has been favorable, but improvements are needed. PMID:8938329

  12. A catalog of intracluster gas temperatures

    NASA Technical Reports Server (NTRS)

    David, L. P.; Slyz, A.; Jones, C.; Forman, W.; Vrtilek, S. D.; Arnaud, K. A.

    1993-01-01

    We have searched the Einstein Monitor Proportional Counter (MPC) data base for observations of clusters of galaxies. By coadding the MPC spectra obtained during all pointed observations of clusters with IPC count rates greater than 0.1 counts/s, we have obtained sufficient photon statistics to estimate the X-ray temperature of 84 clusters. Combining the MPC results with EXOSAT and Ginga results reported in the literature yields a combined sample of 104 clusters with known X-ray temperatures. One of the best studied X-ray correlations between clusters is that between their X-ray luminosity and gas temperature. We show that the best-fit power-law relation for our combined cluster sample can be explained by the observed increase in the gas-to-stellar mass ratio between low- and high-temperature clusters. The statistical significance of any evolution in our combined X-ray sample has been examined and compared with the statistical properties of clusters culled from optical catalogs. We find that there is strong evidence for a decrease in the X-ray luminosity of optically rich clusters beyond z approximately about 0.06. This result is used to estimate the normalization of the primordial power spectrum of density fluctuations.

  13. Online Catalog Study: Final Report.

    ERIC Educational Resources Information Center

    Siegel, Elliot R.

    Following the closing of the National Library of Medicine's (NLM's) card catalog, a study was performed in 1982 to specify minimally acceptable requirements and capabilities for an NLM-based online catalog system and to evaluate the technical performance and user acceptance of available systems. Two prototype online catalog systems were selected…

  14. Catalog of infrared observations

    NASA Technical Reports Server (NTRS)

    Gezari, D. Y.; Schmitz, M.; Mead, J. M.

    1982-01-01

    The infrared astronomical data base and its principal data product, the catalog of Infrared Observations (CIO), comprise a machine readable library of infrared (1 microns to 1000 microns astronomical observations. To date, over 1300 journal articles and 10 major survey catalogs are included in this data base, which contains about 55,000 individual observations of about 10,000 different infrared sources. Of these, some 8,000 sources are identifiable with visible objects, and about 2,000 do not have known visible counterparts.

  15. Updating Hawaii Seismicity Catalogs with Systematic Relocations and Subspace Detectors

    NASA Astrophysics Data System (ADS)

    Okubo, P.; Benz, H.; Matoza, R. S.; Thelen, W. A.

    2015-12-01

    We continue the systematic relocation of seismicity recorded in Hawai`i by the United States Geological Survey's (USGS) Hawaiian Volcano Observatory (HVO), with interests in adding to the products derived from the relocated seismicity catalogs published by Matoza et al., (2013, 2014). Another goal of this effort is updating the systematically relocated HVO catalog since 2009, when earthquake cataloging at HVO was migrated to the USGS Advanced National Seismic System Quake Management Software (AQMS) systems. To complement the relocation analyses of the catalogs generated from traditional STA/LTA event-triggered and analyst-reviewed approaches, we are also experimenting with subspace detection of events at Kilauea as a means to augment AQMS procedures for cataloging seismicity to lower magnitudes and during episodes of elevated volcanic activity. Our earlier catalog relocations have demonstrated the ability to define correlated or repeating families of earthquakes and provide more detailed definition of seismogenic structures, as well as the capability for improved automatic identification of diverse volcanic seismic sources. Subspace detectors have been successfully applied to cataloging seismicity in situations of low seismic signal-to-noise and have significantly increased catalog sensitivity to lower magnitude thresholds. We anticipate similar improvements using event subspace detections and cataloging of volcanic seismicity that include improved discrimination among not only evolving earthquake sequences but also diverse volcanic seismic source processes. Matoza et al., 2013, Systematic relocation of seismicity on Hawai`i Island from 1992 to 2009 using waveform cross correlation and cluster analysis, J. Geophys. Res., 118, 2275-2288, doi:10.1002/jgrb.580189 Matoza et al., 2014, High-precision relocation of long-period events beneath the summit region of Kīlauea Volcano, Hawai`i, from 1986 to 2009, Geophys. Res. Lett., 41, 3413-3421, doi:10.1002/2014GL059819

  16. The ARCHES Integrated Cluster Finder

    NASA Astrophysics Data System (ADS)

    Mints, A.; Schwope, A.

    2014-07-01

    We are developing a tool to search for galaxy clusters associated with X-ray sources from the 3XMM catalog within the ARCHES project (Astronomical Resource cross-matching for High-Energy Studies). We make use of the new cross-matching tool developed for ARCHES to select galaxies in different catalogs around X-ray positions and then try to find clusters by searching for overdensities in the multi-color space. Colors are related to redshifts using spectroscopic data for passively evolving galaxies from the BOSS and VIPERS catalogs. So far we are making use of SDSS, UKIDSS, WISE, and CFHTLS photometric catalogs, but the method can easily be expanded to other data as well (e.g. Pan-STARRS and DES). We present test results of our tool performed on reference samples from the XMM/SDSS cluster survey (Takey et al 2012) and the NORAS/REFLEX surveys.

  17. Spitzer Clusters

    NASA Astrophysics Data System (ADS)

    Krick, Kessica

    examine the effect that evolutions of cluster redshift and dynamical state have on SFG and AGN in groups and clusters. In addition to environment, we will study the timescales of chemical enrichment of the ICM, using the SFG and AGN as tracers of processes that can transport metals outside of galaxies. Cosmological parameters can be measured based on observing galaxy clusters as signposts of the growth of structure in the universe. The best way to select a redshift independent sample is to use the SZ effect with mm observations to detect a shift in the cosmic microwave background spectrum as those photons scatter off hot gas in clusters. However, such mm observations are contaminated by the emission of SFG and AGN. We intend to characterize the magnitude of this effect on SZ surveys by understanding the frequency, radial distribution, and redshift distribution of these galaxies in clusters. Lastly, a compiled cluster catalog of all Spitzer observed clusters would be useful to the broader astronomical community. We plan to incorporate ancillary multi-wavelength data, where available, and to both publish our catalog in journals, and work with NED to make the catalog easily accessible in an efficient manner by the community.

  18. The Whole Word Catalog.

    ERIC Educational Resources Information Center

    Brown, Rosellen, Ed.; And Others

    This catalog, addressed to teachers of writing in the elementary and high schools, consists of (1) suggested assignments to stimulate creative writing, (2) descriptions of materials and assignment references that might be used with the assignments, (3) a list of books and magazines containing anthologies of writing by young people, and (4)…

  19. AUDIOVISUAL SERVICES CATALOG.

    ERIC Educational Resources Information Center

    Stockton Unified School District, CA.

    A CATALOG HAS BEEN PREPARED TO HELP TEACHERS SELECT AUDIOVISUAL MATERIALS WHICH MIGHT BE HELPFUL IN ELEMENTARY CLASSROOMS. INCLUDED ARE FILMSTRIPS, SLIDES, RECORDS, STUDY PRINTS, FILMS, TAPE RECORDINGS, AND SCIENCE EQUIPMENT. TEACHERS ARE REMINDED THAT THEY ARE NOT LIMITED TO USE OF THE SUGGESTED MATERIALS. APPROPRIATE GRADE LEVELS HAVE BEEN…

  20. Book Catalog Use Study

    ERIC Educational Resources Information Center

    Sacco, Concetta N.

    1973-01-01

    Technological developments of the past twenty years have resulted in renewed interest in book-form catalogs. Users were surveyed at two libraries to determine that their satisfaction with bibliographical data, entry points, and physical form. (17 references) (Author/DH)

  1. FAA Film Catalog.

    ERIC Educational Resources Information Center

    Federal Aviation Administration (DOT), Washington, DC.

    Some 75 films from the U.S. Department of Transportation's Federal Aviation Administration are listed in this catalog. Topics dealt with include aerodynamics, airports, aviation history and careers, flying clubs, navigation and weather. Most of the films are 16mm sound and color productions. Filmstrips requiring a 35mm projector and phonograph or…

  2. Rural Thinking Skills Catalog.

    ERIC Educational Resources Information Center

    Kruse, Janice

    This catalog aims to help educators locate materials which will assist them in effectively teaching thinking skills. Research for Better Schools (RBS) serves as the lead educational laboratory for the Department of Education's national project on thinking skills. A total of 248 resources, including pamphlets, documents of activities, computer…

  3. INSTRUCTIONAL MATERIALS CATALOG.

    ERIC Educational Resources Information Center

    Ohio Vocational Agriculture Instructional Materials Service, Columbus.

    THE TITLE, IDENTIFICATION NUMBER, DATE OF PUBLICATION, PAGINATION, A BRIEF DESCRIPTION, AND PRICE ARE GIVEN FOR EACH OF THE INSTRUCTIONAL MATERIALS AND AUDIOVISUAL AIDS INCLUDED IN THIS CATALOG. TOPICS COVERED ARE FIELD CORPS, HORTICULTURE, ANIMAL SCIENCE, SOILS, AGRICULTURAL ENGINEERING, AND FARMING PROGRAMS. AN ORDER FORM IS INCLUDED. (JM)

  4. Environmental Education Resource Catalog.

    ERIC Educational Resources Information Center

    Phoenix Union High School District, AZ.

    Prepared for the use of elementary and secondary school teachers, this catalog is designed to provide information about environmental education materials which will aid in classroom presentations and in curriculum development. Subject areas cover conservation and natural resources, ecology and ecosystems, environmental action and survival,…

  5. The Chandra Fornax Survey. II. The Source Catalog

    NASA Astrophysics Data System (ADS)

    Williamson, Karen; Zurek, D.; Scharf, C.

    2010-01-01

    The Fornax cluster of galaxies lies in the southern hemisphere and is second only to the richer and more well-studied Virgo cluster in its accessibility for high resolution multi-wavelength data collection. A deep \\emph{Chandra} survey of the inner one degree of this cluster was performed in 2003, with first results published in 2005 identifying 771 X-ray point sources. We present a catalog of these X-ray point sources. Possible and likely optical candidates were identified from ground-based, HST and GALEX images. This catalog will facilitate future investigations by enhancing our understanding of a cluster's fainter and smaller objects, calibrating distance rulers, and constraining cosmological models. This work was conducted by a Research Experience for Undergraduates (REU) position at the American Museum of Natural History and funded by the NSF.

  6. The C4 clustering algorithm: Clusters of galaxies in the Sloan Digital Sky Survey

    SciTech Connect

    Miller, Christopher J.; Nichol, Robert; Reichart, Dan; Wechsler, Risa H.; Evrard, August; Annis, James; McKay, Timothy; Bahcall, Neta; Bernardi, Mariangela; Boehringer, Hans; Connolly, Andrew; Goto, Tomo; Kniazev, Alexie; Lamb, Donald; Postman, Marc; Schneider, Donald; Sheth, Ravi; Voges, Wolfgang; /Cerro-Tololo InterAmerican Obs. /Portsmouth U., ICG /North Carolina U. /Chicago U., Astron. Astrophys. Ctr. /Chicago U., EFI /Michigan U. /Fermilab /Princeton U. Observ. /Garching, Max Planck Inst., MPE /Pittsburgh U. /Tokyo U., ICRR /Baltimore, Space Telescope Sci. /Penn State U. /Chicago U. /Stavropol, Astrophys. Observ. /Heidelberg, Max Planck Inst. Astron. /INI, SAO

    2005-03-01

    We present the ''C4 Cluster Catalog'', a new sample of 748 clusters of galaxies identified in the spectroscopic sample of the Second Data Release (DR2) of the Sloan Digital Sky Survey (SDSS). The C4 cluster-finding algorithm identifies clusters as overdensities in a seven-dimensional position and color space, thus minimizing projection effects that have plagued previous optical cluster selection. The present C4 catalog covers {approx}2600 square degrees of sky and ranges in redshift from z = 0.02 to z = 0.17. The mean cluster membership is 36 galaxies (with redshifts) brighter than r = 17.7, but the catalog includes a range of systems, from groups containing 10 members to massive clusters with over 200 cluster members with redshifts. The catalog provides a large number of measured cluster properties including sky location, mean redshift, galaxy membership, summed r-band optical luminosity (L{sub r}), velocity dispersion, as well as quantitative measures of substructure and the surrounding large-scale environment. We use new, multi-color mock SDSS galaxy catalogs, empirically constructed from the {Lambda}CDM Hubble Volume (HV) Sky Survey output, to investigate the sensitivity of the C4 catalog to the various algorithm parameters (detection threshold, choice of passbands and search aperture), as well as to quantify the purity and completeness of the C4 cluster catalog. These mock catalogs indicate that the C4 catalog is {approx_equal}90% complete and 95% pure above M{sub 200} = 1 x 10{sup 14} h{sup -1}M{sub {circle_dot}} and within 0.03 {le} z {le} 0.12. Using the SDSS DR2 data, we show that the C4 algorithm finds 98% of X-ray identified clusters and 90% of Abell clusters within 0.03 {le} z {le} 0.12. Using the mock galaxy catalogs and the full HV dark matter simulations, we show that the L{sub r} of a cluster is a more robust estimator of the halo mass (M{sub 200}) than the galaxy line-of-sight velocity dispersion or the richness of the cluster. However, if we

  7. Decal Process Document and Catalog

    NASA Technical Reports Server (NTRS)

    1999-01-01

    The Decal Process Document and Catalog, JSC 27260 is the standard flight decal catalog, complete with illustrations and part numbers. As hardware developers identify labels that have common applicability across end items, these labels can be evaluated for "standard decal classification" and entered into the decal catalog for general use. The hardware developer must have a label design that meets current, applicable labeling requirements, and submit to the Decal Design and Production Facility (DDPF) as a standard label candidate. Upon approval, the label will be added to the decal catalog. The Decal Process Document and Catalog provides a selection of decals from which the NASA and NASA contractor customers can easily order. The decals shown in the catalog have been previously produced and have released engineering/fabrication drawings on file in the (DDPF). A released drawing is required before a decal can be produced or placed into the catalog. Some decals included in the catalog have a common applicability and are used in various NASA vehicles/habitats. It is the intent of the DDPF to maintain this catalog as a "living document" to which decals/placards can be added as they are repeatedly used. The advantage of identifYing flight decals in this catalog is that a released drawing is already in place, and the products will be flight certified.

  8. Education programs catalog

    SciTech Connect

    Not Available

    1994-05-01

    Since its formation in 1977, US DOE has been authorized to support education programs that help ensure an adequate supply of scientists, engineers, and technicians for energy-related research, production activities, and technology transfer. A national conference in 1989 produced a clear vision of the important role that DOE, its facilities, and its 169,000 Federal and contract employees can play in the educational life of their communities and the Nation. Many of the programs listed in this catalog are the result of this new vision; others have existed for many years. Purpose of this catalog is to make all DOE education efforts more widely known so that more teachers, students, and others can benefit. Supporting the hundreds of education programs (precollege, undergraduate, graduate, public) is the network of DOE national laboratories, technology centers, and other research facilities. Brief descriptions of each facility, its programs, and contact information for its education personnel are included.

  9. Geothermal innovative technologies catalog

    SciTech Connect

    Kenkeremath, D.

    1988-09-01

    The technology items in this report were selected on the basis of technological readiness and applicability to current technology transfer thrusts. The items include technologies that are considered to be within 2 to 3 years of being transferred. While the catalog does not profess to be entirely complete, it does represent an initial attempt at archiving innovative geothermal technologies with ample room for additions as they occur. The catalog itself is divided into five major functional areas: Exploration; Drilling, Well Completion, and Reservoir Production; Materials and Brine Chemistry; Direct Use; and Economics. Within these major divisions are sub-categories identifying specific types of technological advances: Hardware; Software; Data Base; Process/Procedure; Test Facility; and Handbook.

  10. Landsat US standard catalog

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The U.S. Standard Catalog lists imagery of the continental U.S., Alaska and Hawaii acquired by Landsat 1 and 2 which has been processed and input to the data files during the referenced month. Data, such as date acquired, cloud cover and image quality are given for each scene. The microfilm roll and frame on which the scene may be found is also given.

  11. NASA Space Science Resource Catalog

    NASA Astrophysics Data System (ADS)

    Teays, T.

    2000-05-01

    The NASA Office of Space Science Resource Catalog provides a convenient online interface for finding space science products for use in classrooms, science museums, planetariums, and many other venues. Goals in developing this catalog are: (1) create a cataloging system for all NASA OSS education products, (2) develop a system for characterizing education products which is meaningful to a large clientele, (3) develop a mechanism for evaluating products, (4) provide a user-friendly interface to search and access the data, and (5) provide standardized metadata and interfaces to other cataloging and library systems. The first version of the catalog is being tested at the spring 2000 conventions of the National Science Teachers Association (NSTA) and the National Council of Teachers of Mathematics (NCTM) and will be released in summer 2000. The catalog may be viewed at the Origins Education Forum booth.

  12. The Catalog Takes to the Highway.

    ERIC Educational Resources Information Center

    Chesbro, Melinda

    1999-01-01

    Discusses new developments in online library catalogs, including Web-based catalogs; interconnectivity within the library; interconnectivity between libraries; graphical user interfaces; pricing models; and a checklist of questions to ask when purchasing a new online catalog. (LRW)

  13. Cataloging Expert Systems: Optimism and Frustrated Reality.

    ERIC Educational Resources Information Center

    Olmstadt, William J.

    2000-01-01

    Discusses artificial intelligence and attempts to catalog expert systems. Topics include the nature of expertise; examples of cataloging expert systems; barriers to implementation; and problems, including total automation, cataloging expertise, priorities, and system design. (LRW)

  14. VizieR Online Data Catalog: Cordoba Carte du Ciel-Astrographic Catalog, CCAC (Orellana+, 2010)

    NASA Astrophysics Data System (ADS)

    Orellana, R. B.; de Biasi, M. S.; Bustos Fierro, I. H.; Calderon, J. H.

    2010-07-01

    This is Cordoba Carte du Ciel-Astrographic Catalog (CCAC) constructed from four Carte du Ciel and one Astrographic Catalog photographic plates for first epoch positions in the region of the open cluster Collinder 132. The plates were digitized using the MAMA measuring machine from the Paris Observatory. Stars from Tycho-2 catalogue (Hog et al., 2000, Cat. I/259) were used as reference stars. Every plate was reduced independently from the others adopting a first order polynomial in the measured coordinates. Proper motions were calculated using the CCAC positions as first epoch, and as second epoch the positions given by UCAC2 (Zacharias et al., 2004, Cat. I/289) and USNO-B1.0 (Monet et al., 2003, Cat. I/284). (2 data files).

  15. The Gaia hybrid catalog: a leverage to find Galactic structures

    NASA Astrophysics Data System (ADS)

    Fouesneau, M.; Bailer-Jones, C. A. L.

    2014-07-01

    of the WISE filters, one can select the Oxygen-rich Asymptotic Giant Branch (AGBs) stars to find spatial substructures with particular interstellar medium properties. Breaking through the distance-extinction degeneracies will also help finding large scale structures in the disk such as streams or spiral arms, especially when combined with age or metallicity selections for instance. Second, we presented one aspect of the hybrid catalogs dedicated to support the analysis of star clusters. Star clusters are not only calibrators of stellar evolution models but also references to study star formation in general. We presented one future outcome of the hybrid catalogs, in which we provide for known star clusters, an assessment of stellar memberships based on a combination of phase-space, and colormagnitude distribution fitting. In this application, the assumption that a cluster is a "simple" population provides a significant advantage when deriving individual star properties. Eventually one can imagine this application can be extended to stellar streams. Hybrid catalogs are meant to be provided along with the Gaia data releases, and will offer a tremendous source of validation for the Gaia Data Processing.

  16. "Where's the Catalog?" An Introduction.

    ERIC Educational Resources Information Center

    Rockman, Ilene F.

    1979-01-01

    Introduces three papers presented at the RASD (Reference and Adult Services Division) Catalog Use Committee program--"Where's the Catalog? Automation, AACR 2, and the User"--held at the 1979 American Library Association Annual Conference. The papers address the program's challenges from different perspectives. (Author)

  17. A catalog of stellar spectrophotometry

    NASA Technical Reports Server (NTRS)

    Adelman, S. J.; Pyper, D. M.; Shore, S. N.; White, R. E.; Warren, W. H., Jr.

    1989-01-01

    A machine-readable catalog of stellar spectrophotometric measurements made with rotating grating scanner is introduced. Consideration is given to the processes by which the stellar data were collected and calibrated with the fluxes of Vega (Hayes and Latham, 1975). A sample page from the spectrophotometric catalog is presented.

  18. Space surveillance satellite catalog maintenance

    NASA Astrophysics Data System (ADS)

    Jackson, Phoebe A.

    1990-04-01

    The United States Space Command (USSPACECOM) is a Unified Command of the Department of Defense with headquarters at Peterson Air Force Base, Colorado Springs, Co. One of the responsibilities of USSPACECOM is to detect, track, identify, and maintain a catalog of all manmade objects in earth orbit. This satellite catalog is the most important tool for space surveillance. The purpose of this paper is threefold. First, to identify why the command does the job of satellite catalog maintenance. Second, to describe what the satellite catalog is and how it is maintained. Third, and finally, to identify the questions that must be addressed if this command is to track small space object debris. This paper's underlying rationale is to describe our catalog maintenance services so that the members of our community can use them with assurance.

  19. The Visual Double Star Catalogs

    NASA Astrophysics Data System (ADS)

    Mason, Brian D.

    2015-08-01

    In visual double star work, production of the first comprehensive attempt to list all discovered pairs in his accessible sky was prepared by S.W. Burnham in 1906. A double star catalog for the southern hemisphere was prepared by R.T.A. Innes et al. in 1927 and the northern hemisphere catalog was updated by R.G. Aitken and E. Doolittle in 1932. Eventually, this led to Lick Observatory maintaining what became known as the Index Catalogue, an all-sky visual double star database.In 1964, under the aegis of Commission 26, the Lick double star database was transferred to the U.S. Naval Observatory where it was redesignated the Washington Double Star Catalog where it and it's ancillary catalogs, have been maintained for over half a century. The current statistics of the catalog and it's supplements are presented as are the enhancements currently under consideration.

  20. Intermediate Redshift Galaxy Clusters from DPOSS

    NASA Astrophysics Data System (ADS)

    Lopes, P. A. A.

    2003-06-01

    In this thesis we discuss the selection of intermediate redshift galaxy cluster candidates based on the Digitized Second Palomar Observatory Sky Survey (DPOSS). Clusters are detected using the best DPOSS plates based on seeing and limiting magnitude. The search is further restricted to high galactic latitudes (|b| > 50 °), where stellar contamination is mild and nearly uniform. The input galaxy catalogs used for this search are limited to r = 21.1. The cluster selection is based on two techniques, the adaptive kernel and the voronoi tesselation methods. The final combined catalog contains ~ 10,000 candidates over ~ 2,700 square degrees, with ~ 0.30 and ~ 40 (Ngals is a richness estimate we provide). Rich clusters are detected down to z ~ 0.5. This cluster catalog is a supplement to the previous DPOSS catalogs, being the largest resource of rich clusters in this redshift range to date. In order to optimize the detection algorithms and estimate the contamination and completeness rates, we perform a large number of simulations for both catalogs. Redshift and richness estimates are also provided for all candidates in the two catalogs. As a by-product we present a comparison between the DPOSS and SDSS surveys. This comparison is used to estimate the DPOSS detection limits. Some of the projects to be developed in the future are also discussed.

  1. Standards for Cataloging Nonprint Materials. Revised Edition.

    ERIC Educational Resources Information Center

    Quinly, William J.; And Others

    Rules and procedures for cataloging non-print media are provided in this manual of the Association for Educational Communications and Technology. The first section on cataloging rules covers all elements which should appear on the catalog card. After some comments on entries, the arrangement of catalog elements, and style, the elements of the…

  2. Comparing foreshock characteristics and foreshock forecasting in observed and simulated earthquake catalogs

    NASA Astrophysics Data System (ADS)

    Ogata, Yosihiko; Katsura, Koichi

    2014-11-01

    In this paper, we compare the empirical results regarding foreshocks obtained from the Japan data with results for synthetic catalogs in order to clarify whether or not the corresponding results are consistent with the description of the seismicity by a superposition of background activity and epidemic-type aftershock sequence (ETAS) models. This question is important, because it is still controversially discussed whether the nucleation process of large earthquakes is driven by seismically cascading (ETAS type) or by aseismic accelerating processes. To explore the foreshock characteristics, we first applied the same clustering algorithms to real and synthetic catalogs and analyzed the temporal, spatial, and magnitude distributions of the selected foreshocks. Most properties are qualitatively the same in the real data and in synthetic catalogs. However, we find some quantitative differences particularly in the temporal acceleration, spatial convergence, and magnitude dependence, which also depend on the assumed synthetic catalogs. Furthermore, we calculated forecast scores based on a single-link cluster algorithm which could be appropriate for real-time applications. We find that the Japan Meteorological Agency catalog yields higher scores than all synthetic catalogs and that the ETAS models having the same magnitude sequence as the original catalog performs better (more close to the reality) than ETAS models with randomly picked magnitudes. We also find that the ETAS model that takes account of the triggering effect by small earthquakes below threshold magnitude performs more closely to the reality.

  3. A catalog of 2810 nearby galaxies - The effect of the Virgocentric flow model on their observed velocities

    NASA Astrophysics Data System (ADS)

    Kraan-Korteweg, R. C.

    1986-12-01

    A catalog of 2810 nearby galaxies has been prepared. The conditions for an inclusion into the catalog ensure that most galaxies for which the effect of the overdensity of the Virgo cluster on their observed redshifts is not negligible are listed. Three main entities define the catalog: (1) a magnitude-limited catalog with BT ≤ 13m.4, (2) a volume-limited catalog with v0 ≤ 500 km s-1, and (3) a Virgo catalog for galaxies within a 10°-cone around M87 limited at BT ≤ 14m.95. In correspondence to a virgocentric nonlinear flow model (Silk 1974, 1977), distances are calculated for all galaxies in the catalog with known redshifts. In addition to the positions, the recession velocities and the calculated distances, morphological types, diameters, axis ratios, apparent blue magnitudes, and absorption-corrected luminosities based on rVir = 21.7 Mpc are listed. Some sample pages of the catalog are presented. The whole catalog will be made available upon request. A magnetic tape version of the catalog can be provided as well. The nonlinear flow model itself, the choice of the adopted parameters and the significance of individual parameters on the flow pattern are described in detail.

  4. NASA Video Catalog

    NASA Technical Reports Server (NTRS)

    2006-01-01

    This issue of the NASA Video Catalog cites video productions listed in the NASA STI database. The videos listed have been developed by the NASA centers, covering Shuttle mission press conferences; fly-bys of planets; aircraft design, testing and performance; environmental pollution; lunar and planetary exploration; and many other categories related to manned and unmanned space exploration. Each entry in the publication consists of a standard bibliographic citation accompanied by an abstract. The Table of Contents shows how the entries are arranged by divisions and categories according to the NASA Scope and Subject Category Guide. For users with specific information, a Title Index is available. A Subject Term Index, based on the NASA Thesaurus, is also included. Guidelines for usage of NASA audio/visual material, ordering information, and order forms are also available.

  5. Cosmic Dust Catalog

    NASA Astrophysics Data System (ADS)

    Warren, J.; Watts, L.; Thomas-Keprta, K.; Wentworth, S.; Dodson, A.; Zolensky, Michael E.

    1997-07-01

    Since May 1981, the National Aeronautics and Space Administration (NASA) has used aircraft to collect cosmic dust (CD) particles from Earth's stratosphere. Specially designed dust collectors are prepared for flight and processed after flight in an ultraclean (Class-100) laboratory constructed for this purpose at the Lyndon B. Johnson Space Center (JSC) in Houston, Texas. Particles are individually retrieved from the collectors, examined and cataloged, and then made available to the scientific community for research. Cosmic dust thereby joins lunar samples and meteorites as an additional source of extraterrestrial materials for scientific study. This catalog summarizes preliminary observations on 468 particles retrieved from collection surfaces L2021 and L2036. These surfaces were flat plate Large Area Collectors (with a 300 cm2 surface area each) which was coated with silicone oil (dimethyl siloxane) and then flown aboard a NASA ER-2 aircraft during a series of flights that were made during January and February of 1994 (L2021) and June 7 through July 5 of 1994 (L2036). Collector L2021 was flown across the entire southern margin of the US (California to Florida), and collector L2036 was flown from California to Wallops Island, VA and on to New England. These collectors were installed in a specially constructed wing pylon which ensured that the necessary level of cleanliness was maintained between periods of active sampling. During successive periods of high altitude (20 km) cruise, the collectors were exposed in the stratosphere by barometric controls and then retracted into sealed storage container-s prior to descent. In this manner, a total of 35.8 hours of stratospheric exposure was accumulated for collector L2021, and 26 hours for collector L2036.

  6. MC and A instrumentation catalog

    SciTech Connect

    Neymotin, L.; Sviridova, V.

    1998-06-01

    In 1981 and 1985, two editions of a catalog of non-destructive nuclear measurement instrumentation, and material control and surveillance equipment, were published by Brookhaven National Laboratory (BNL). The last edition of the catalog included one hundred and twenty-five entries covering a wide range of devices developed in the US and abroad. More than ten years have elapsed since the publication of the more recent Catalog. Devices described in it have undergone significant modifications, and new devices have been developed. Therefore, in order to assist specialists in the field of Material Control and Accounting (MC and A), a new catalog has been created. Work on this instrumentation catalog started in 1997 as a cooperative effort of Brookhaven National Laboratory (BNL), operated by Brookhaven Science Associates under contract to the US Department of Energy, and the All-Russian Research Institute of Automatics (VNIIA), subordinate institute of the Atomic Energy Ministry of the Russian Federation, within the collaborative US-Russia Material Protection, Control, and Accounting (MPC and A) Program. Most of the equipment included in the Catalog are non-destructive assay (NDA) measurement devices employed for purposes of accounting, confirmation, and verification of nuclear materials. Other devices also included in the Catalog are employed in the detection and deterrence of unauthorized access to or removal of nuclear materials (material control: containment and surveillance). Equipment found in the Catalog comprises either: (1) complete devices or systems that can be used for MC and A applications; or (2) parts or components of complete systems, such as multi-channel analyzers, detectors, neutron generators, and software. All devices are categorized by their status of development--from prototype to serial production.

  7. Water Resources Division training catalog

    USGS Publications Warehouse

    Hotchkiss, W.R.; Foxhoven, L.A.

    1984-01-01

    The National Training Center provides technical and management sessions nesessary for the conductance of the U.S. Geological Survey 's training programs. This catalog describes the facilities and staff at the Lakewood Training Center and describes Water Resources Division training courses available through the center. In addition, the catalog describes the procedures for gaining admission, formulas for calculating fees, and discussion of course evaluations. (USGS)

  8. Lunar soils grain size catalog

    NASA Technical Reports Server (NTRS)

    Graf, John C.

    1993-01-01

    This catalog compiles every available grain size distribution for Apollo surface soils, trench samples, cores, and Luna 24 soils. Original laboratory data are tabled, and cumulative weight distribution curves and histograms are plotted. Standard statistical parameters are calculated using the method of moments. Photos and location comments describe the sample environment and geological setting. This catalog can help researchers describe the geotechnical conditions and site variability of the lunar surface essential to the design of a lunar base.

  9. Management of Catalogs at CDS

    NASA Astrophysics Data System (ADS)

    Landais, G.; Boch, T.; Brouty, M.; Guéhenneux, S.; Genova, F.; Lesteven, S.; Ochsenbein, F.; Ocvirk, P.; Perret, E.; Pineau, F.-X.; Simon, A.-C.; Vannier, P.

    2015-04-01

    VizieR (Ochsenbein et al. 2000) provides access to the most complete library of published astronomical catalogs (data tables and associated data) available online and organized in a self-documented database. (There were 11769 catalogs in November 2013.) Indexing the metadata in the VizieR search engine requires the expertise of scientists and documentalists for each catalog ingested. The metadata go into an efficient position search engine that is adapted to big data. (For instance, the GAIA simulation catalog has more than two billion objects). Information in VizieR tables is well described and can be retrieved easily. The search results provide visibility to catalogs with tools and protocols to disseminate data to the Virtual Observatory, thus giving scientists data that is reusable by dedicated tools (e.g. image vizualisation tools). Also, new functionality allows users to extract all photometric data in catalogs for a given position. Finally, it is also through cross-identification tools that the CDS becomes a partner in producing large data sets, such as GAIA.

  10. Astronomical catalog desk reference, 1994 edition

    NASA Technical Reports Server (NTRS)

    1994-01-01

    The Astronomical Catalog Desk Reference is designed to aid astronomers in locating machine readable catalogs in the Astronomical Data Center (ADC) archives. The key reference components of this document are as follows: A listing of shortened titles for all catalogs available from the ADC (includes the name of the lead author and year of publication), brief descriptions of over 300 astronomical catalogs, an index of ADC catalog numbers by subject keyword, and an index of ADC catalog numbers by author. The heart of this document is the set of brief descriptions generated by the ADC staff. The 1994 edition of the Astronomical Catalog Desk Reference contains descriptions for over one third of the catalogs in the ADC archives. Readers are encouraged to refer to this section for concise summaries of those catalogs and their contents.

  11. Small satellite debris catalog maintenance issues

    NASA Technical Reports Server (NTRS)

    Jackson, Phoebe A.

    1991-01-01

    The United States Space Command (USSPACECOM) is a unified command of the Department of Defense, and one of its tasks is to detect, track, identify, and maintain a catalog of all man-made objects in Earth orbit. This task is called space surveillance, and the most important tool for space surveillance is the satellite catalog. The command's reasons for performing satellite catalog maintenance is presented. A satellite catalog is described, and small satellite-debris catalog-maintenance issues are identified. The underlying rationale is to describe the catalog maintenance services so that the members of the community can use them with assurance.

  12. Vizic: Jupyter-based interactive visualization tool for astronomical catalogs

    NASA Astrophysics Data System (ADS)

    Yu, Weixiang; Carrasco-Kind, Matias; Brunner, Robert J.

    2017-01-01

    Vizic is a Python visualization library that builds the connection between images and catalogs through an interactive map of the sky region. The software visualizes catalog data over a custom background canvas using the shape, size and orientation of each object in the catalog and displays interactive and customizable objects in the map. Property values such as redshift and magnitude can be used to filter or apply colormaps, and objects can be selected for further analysis through standard Python functions from inside a Jupyter notebook. Vizic allows custom overlays to be appended dynamically on top of the sky map; included are Voronoi, Delaunay, Minimum Spanning Tree and HEALPix layers, which are helpful for visualizing large-scale structure. Overlays can be generated, added or removed dynamically with one line of code. Catalog data is kept in a non-relational database. The Jupyter Notebook allows the user to create scripts to analyze and plot the data selected/displayed in the interactive map, making Vizic a powerful and flexible interactive analysis tool. Vizic be used for data inspection, clustering analysis, galaxy alignment studies, outlier identification or simply large-scale visualizations.

  13. Comparing Foreshock Characteristics and Foreshock Forecasting in Observed and Simulated Earthquake Catalogs

    NASA Astrophysics Data System (ADS)

    Ogata, Y.

    2014-12-01

    In our previous papers (Ogata et al., 1995, 1996, 2012; GJI), we characterized foreshock activity in Japan, and then presented a model that forecasts the probability that one or more earthquakes form a foreshock sequence; then we tested prospectively foreshock probabilities in the JMA catalog. In this talk, I compare the empirical results with results for synthetic catalogs in order to clarify whether or not these results are consistent with the description of the seismicity by a superposition of background activity and epidemic-type aftershock sequences (ETAS models). This question is important, because it is still controversially discussed whether the nucleation process of large earthquakes is driven by seismically cascading (ETAS-type) or by aseismic accelerating processes. To explore the foreshock characteristics, I firstly applied the same clustering algorithms to real and synthetic catalogs and analyzed the temporal, spatial and magnitude distributions of the selected foreshocks, to find significant differences particularly in the temporal acceleration and magnitude dependence. Finally, I calculated forecast scores based on a single-link cluster algorithm which could be appropriate for real-time applications. I find that the JMA catalog yields higher scores than all synthetic catalogs and that the ETAS models having the same magnitude sequence as the original catalog performs significantly better (more close to the reality) than ETAS-models with randomly picked magnitudes.

  14. The Kepler Input Catalog

    NASA Astrophysics Data System (ADS)

    Latham, D. W.; Brown, T. M.; Monet, D. G.; Everett, M.; Esquerdo, G. A.; Hergenrother, C. W.

    2005-12-01

    The Kepler mission will monitor 170,000 planet-search targets during the first year, and 100,000 after that. The Kepler Input Catalog (KIC) will be used to select optimum targets for the search for habitable earth-like transiting planets. The KIC will include all known catalogued stars in an area of about 177 square degrees centered at RA 19:22:40 and Dec +44:30 (l=76.3 and b=+13.5). 2MASS photometry will be supplemented with new ground-based photometry obtained in the SDSS g, r, i, and z bands plus a custom filter centered on the Mg b lines, using KeplerCam on the 48-inch telescope at the Whipple Observatory on Mount Hopkins, Arizona. The photometry will be used to estimate stellar characteristics for all stars brighter than K 14.5 mag. The KIC will include effective temperature, surface gravity, metallicity, reddening, distance, and radius estimates for these stars. The CCD images are pipeline processed to produce instrumental magnitudes at PSI. The photometry is then archived and transformed to the SDSS system at HAO, where the astrophysical analysis of the stellar characteristics is carried out. The results are then merged with catalogued data at the USNOFS to produce the KIC. High dispersion spectroscopy with Hectochelle on the MMT will be used to supplement the information for many of the most interesting targets. The KIC will be released before launch for use by the astronomical community and will be available for queries over the internet. Support from the Kepler mission is gratefully acknowledged.

  15. The RBV metadata catalog

    NASA Astrophysics Data System (ADS)

    André, François; Brissebrat, Guillaume; Fleury, Laurence; Gaillardet, Jérôme; Nord, Guillaume

    2014-05-01

    RBV (Réseau des Bassins Versants) is an initiative to consolidate the national efforts made by more than 15 elementary observatories belonging to various French research institutions (CNRS, Universities, INRA, IRSTEA, IRD) that study river and drainage basins. RBV is a part of a global initiative to create a network of observatories for investigating Earth's surface processes. The RBV Metadata Catalogue aims to give an unified vision of the work produced by every observatory to both the members of the RBV network and any external person involved in this domain of research. Another goal is to share this information with other catalogues through the compliance with the ISO19115 standard and the INSPIRE directive and the ability of being harvested (globally or partially). Metadata management is heterogeneous among observatories. The catalogue is designed to face this situation with the following main features: -Multiple input methods: Metadata records in the catalog can either be entered with the graphical user interface, harvested from an existing catalogue or imported from information system through simplified web services. -Three hierachical levels: Metadata records may describe either an observatory in general, one of its experimental site or a dataset produced by instruments. -Multilingualism: Metadata can be entered in several configurable languages. The catalogue provides many other feature such as search and browse mechanisms to find or discover records. The RBV metadata catalogue associates a CSW metadata server (Geosource) and a JEE application. The CSW server is in charge of the persistence of the metadata while the JEE application both wraps CSW calls and define the user interface. The latter is built with the GWT Framework to offer a rich client application with a fully ajaxified navigation. The catalogue is accessible at the following address: http://portailrbv.sedoo.fr/ Next steps will target the following points: -Description of sensors in accordance

  16. The RBV metadata catalog

    NASA Astrophysics Data System (ADS)

    Andre, Francois; Fleury, Laurence; Gaillardet, Jerome; Nord, Guillaume

    2015-04-01

    RBV (Réseau des Bassins Versants) is a French initiative to consolidate the national efforts made by more than 15 elementary observatories funded by various research institutions (CNRS, INRA, IRD, IRSTEA, Universities) that study river and drainage basins. The RBV Metadata Catalogue aims at giving an unified vision of the work produced by every observatory to both the members of the RBV network and any external person interested by this domain of research. Another goal is to share this information with other existing metadata portals. Metadata management is heterogeneous among observatories ranging from absence to mature harvestable catalogues. Here, we would like to explain the strategy used to design a state of the art catalogue facing this situation. Main features are as follows : - Multiple input methods: Metadata records in the catalog can either be entered with the graphical user interface, harvested from an existing catalogue or imported from information system through simplified web services. - Hierarchical levels: Metadata records may describe either an observatory, one of its experimental site or a single dataset produced by one instrument. - Multilingualism: Metadata can be easily entered in several configurable languages. - Compliance to standards : the backoffice part of the catalogue is based on a CSW metadata server (Geosource) which ensures ISO19115 compatibility and the ability of being harvested (globally or partially). On going tasks focus on the use of SKOS thesaurus and SensorML description of the sensors. - Ergonomy : The user interface is built with the GWT Framework to offer a rich client application with a fully ajaxified navigation. - Source code sharing : The work has led to the development of reusable components which can be used to quickly create new metadata forms in other GWT applications You can visit the catalogue (http://portailrbv.sedoo.fr/) or contact us by email rbv@sedoo.fr.

  17. Searching the SOHO online catalogs

    NASA Technical Reports Server (NTRS)

    Thompson, William; Yurow, Ron

    1994-01-01

    The SOHO on-line catalogs will contain information about the observations from several made or planned campaigns, that must be available to scientists who wish to use SOHO data. The World Wide Web (WWW) was chosen as the interface to the SOHO on-line catalogs, because it is easy to use, well suited to a geographically distributed user community, and freely available. Through the use of a forms-capable WWW client such as Mosaic or Lynx, a scientist will be able to browse through the catalogs of observations in a very simple, self explanatory way. Data files can then be selected from the returned lists for either immediate transferring or sending on tape by mail, with appropriate checks for whether data is in the public domain or not.

  18. Computer Software Cataloging: Techniques and Examples.

    ERIC Educational Resources Information Center

    Holzberlein, Deanne

    1986-01-01

    Examples of catalog entries for microcomputer software data files are given in three sections: educational software (elementary and secondary level, college level); educational game software; business-related software. Catalog record elements, simplification methods for cataloging of machine-readable data files, and future considerations are…

  19. Cooperative Catalog Conversion Study. Final Report.

    ERIC Educational Resources Information Center

    Peat, Marwick, Mitchell and Co., Washington, DC.

    Cost estimates provided by cataloging vendors during January 1981 are analyzed to identify the costs of catalog conversion options and alternatives to the card catalog for six Minnesota regional library systems. Following an executive summary of the study is a discussion of its background, scope, objectives, data gathering methodology, and…

  20. Iranian National Union Catalog Description and Regulations.

    ERIC Educational Resources Information Center

    Harvey, John F.

    This outline of how to establish and maintain an Asian national union catalog contains basic instruction for the staff and for the participating libraries of one of West Asia's largest union catalogs. It has been prepared to: (1) define and clarify the purposes of the Iranian National Union Catalog; (2) explain the policies and procedures under…

  1. Subject Access in the Online Catalog.

    ERIC Educational Resources Information Center

    Mandel, Carol A.

    This review of the research on subject access to library collections focuses on the problems of and prospects for improved online subject access to library collections. Summaries of the general findings of studies on library catalog use and catalog users and some reasons for the frequent failure of subject searches in library catalogs are followed…

  2. CORC--Cooperative Online Resource Catalog.

    ERIC Educational Resources Information Center

    Hickey, Thomas B.

    2001-01-01

    Describes OCLC's CORC (Cooperative Online Resource Catalog) that is being developed to explore the cooperative creation of a catalog of Internet resources that will support both MARC and less formal metadata. Explains the catalog design which will allow dynamic generation of Web pages with resources for integration with libraries' portal pages.…

  3. Notes for Serials Cataloging. Second Edition.

    ERIC Educational Resources Information Center

    Geer, Beverley, Ed.; Caraway, Beatrice L., Ed.

    Notes are indispensable to serials cataloging. Researchers, reference librarians, and catalogers regularly use notes on catalog records and, as the audience for these notes has expanded from the local library community to the global Internet community, the need for notes to be cogent, clear, and useful is greater than ever. This book is a…

  4. Standards for Cataloging Nonprint Materials. Third Edition.

    ERIC Educational Resources Information Center

    Quinly, William J.; And Others

    Rules for cataloging non-print media are presented. The publication is devoted exclusively to cataloging standards since coding of many non-print media is included in the Library of Congress MARC system. All elements which should appear on the cataloging card are identified; the elements of the description are described with the MARC format in…

  5. Viking orbiter stereo imaging catalog

    NASA Technical Reports Server (NTRS)

    Blasius, K. R.; Vetrone, A. V.; Martin, M. D.

    1980-01-01

    The extremely long missions of the two Viking Orbiter spacecraft produced a wealth of photos of surface features. Many of which can be used to form stereo images allowing the earth-bound student of Mars to examine the subject in 3-D. This catalog is a technical guide to the use of stereo coverage within the complex Viking imaging data set. Since that data set is still growing (January, 1980, about 3 1/2 years after the mission began), a second edition of this catalog is planned with completion expected about November, 1980.

  6. Catalog It! A Guide to Cataloging School Library Materials.

    ERIC Educational Resources Information Center

    Kaplan, Allison G.; Riedling, Ann Marlow

    This book is designed for courses that prepare college and university students for undergraduate or graduate degrees in school library media. Its objectives are to present the theory and practice of cataloging and classification in the school library environment. The manual is divided into eight chapters. Chapter 1: A Brief History of Cataloging…

  7. LasDamas Mock Galaxy Catalogs for SDSS

    NASA Astrophysics Data System (ADS)

    McBride, Cameron; Berlind, A.; Scoccimarro, R.; Wechsler, R.; Busha, M.; Gardner, J.; van den Bosch, F.

    2009-01-01

    The statistical strength of galaxy redshift surveys, such as the Sloan Digital Sky Survey (SDSS), have ushered us into the era of precision measurements of galaxy clustering. We are now fitting physical models to measured clustering statistics. Galaxy clustering is thus in a position to directly constrain cosmological and galaxy formation theories. This paradigm shift from qualitative to quantitative demands that we understand the statistical and systematic errors in our measurements. Moreover, we must quantify the theoretical uncertainties in our models, which are no longer clearly sub-dominant to observational errors. We address this emerging need with the LasDamas project (LArge Suite of DArk MAtter Simulations) by producing an unprecedented number of independent and realistic mock galaxy catalogs. To date, we have run over 100 independent N-body realizations using a fixed cosmology and initialized using 2nd order Lagrangian perturbation theory. We populate overdensities of dark matter using the halo occupation distribution framework, designed to match both small and large scale clustering of the observed SDSS data. A series of mock galaxy catalogs matching the geometry of the final SDSS release (DR7) are created over a wide luminosity range to correspond to Main and LRG volume-limited samples. We include important observational effects, such as redshift distortions and fiber collisions. These galaxy mocks are publicly available.

  8. Second Line of Defense Master Spares Catalog

    SciTech Connect

    Henderson, Dale L.; Muller, George; Mercier, Theresa M.; Brigantic, Robert T.; Perkins, Casey J.; Cooley, Scott K.

    2012-11-20

    This catalog is intended to be a comprehensive listing of repair parts, components, kits, and consumable items used on the equipment deployed at SLD sites worldwide. The catalog covers detection, CAS, network, ancillary equipment, and tools. The catalog is backed by a Master Parts Database which is used to generate the standard report views of the catalog. The master parts database is a relational database containing a record for every part in the master parts catalog along with supporting tables for normalizing fields in the records. The database also includes supporting queries, database maintenance forms, and reports.

  9. Notions Catalog. Polish Functional Grammar.

    ERIC Educational Resources Information Center

    Woytak, Lidia

    The Polish notions catalog systematizes a variety of informational codes used in Polish, resulting in lists of notions, each presented from a structural perspective. Where applicable, they are accompanied by a morphological component, structural chart, semantic description, frequentative expressions, and related vocabulary items. The notions…

  10. Technology and the Online Catalog.

    ERIC Educational Resources Information Center

    Graham, Peter S.

    1983-01-01

    Discusses trends in computer technology and their use for library catalogs, noting the concept of bandwidth (describes quantity of information transmitted per given unit of time); computer hardware differences (micros, minis, maxis); distributed processing systems and databases; optical disk storage; networks; transmission media; and terminals.…

  11. Viking orbiter stereo imaging catalog

    NASA Technical Reports Server (NTRS)

    Blasius, K. R.; Vertrone, A. V.; Lewis, B. H.; Martin, M. D.

    1982-01-01

    The extremely long mission of the two Viking Orbiter spacecraft produced a wealth of photos of surface features. Many of these photos can be used to form stereo images allowing the student of Mars to examine a subject in three dimensional. This catalog is a technical guide to the use of stereo coverage within the complex Viking imaging data set.

  12. Catalog of Viking mission data

    NASA Technical Reports Server (NTRS)

    Vostreys, R. W. (Editor)

    1978-01-01

    This catalog announces the present/expected availability of scientific data acquired by the Viking missions and contains descriptions of the Viking spacecraft, experiments, and data sets. An index is included listing the team leaders and team members for the experiments. Information on NSSDC facilities and ordering procedures, and a list of acronyms and abbreviations are included in the appendices.

  13. Catalog of Educational Multimedia Products.

    ERIC Educational Resources Information Center

    National Technical Information Service (DOC), Springfield, VA.

    This catalog lists 276 audiovisual educational materials for sale through the National Technical Information Service. Materials are arranged by subject category: Administration; Black and Women's Studies--Biography, In the Military, and History & Culture; Counseling--Career Counseling; Drug Prevention; Health & Safety; History--Early & American…

  14. Greenbook Abstract and Catalog--3.

    ERIC Educational Resources Information Center

    Coole, Walter A.

    This catalog is the third in a series extending and updating teaching materials previously disseminated through the ERIC system, including the "Greenbook System" of training materials for higher education professionals (ED 103 083 and 084), Open Classroom Documentation, a procedural manual for an autoinstructional learning laboratory at…

  15. Searching for galaxy clusters in the Kilo-Degree Survey

    NASA Astrophysics Data System (ADS)

    Radovich, M.; Puddu, E.; Bellagamba, F.; Roncarelli, M.; Moscardini, L.; Bardelli, S.; Grado, A.; Getman, F.; Maturi, M.; Huang, Z.; Napolitano, N.; McFarland, J.; Valentijn, E.; Bilicki, M.

    2017-02-01

    Aims: In this paper, we present the tools used to search for galaxy clusters in the Kilo Degree Survey (KiDS), and our first results. Methods: The cluster detection is based on an implementation of the optimal filtering technique that enables us to identify clusters as over-densities in the distribution of galaxies using their positions on the sky, magnitudes, and photometric redshifts. The contamination and completeness of the cluster catalog are derived using mock catalogs based on the data themselves. The optimal signal to noise threshold for the cluster detection is obtained by randomizing the galaxy positions and selecting the value that produces a contamination of less than 20%. Starting from a subset of clusters detected with high significance at low redshifts, we shift them to higher redshifts to estimate the completeness as a function of redshift: the average completeness is 85%. An estimate of the mass of the clusters is derived using the richness as a proxy. Results: We obtained 1858 candidate clusters with redshift 0 cluster catalogs shows that we match more than 50% of the clusters (77% in the case of the redMaPPer catalog). We also cross-matched our cluster catalog with the Abell clusters, and clusters found by XMM and in the Planck-SZ survey; however, only a small number of them lie inside the KiDS area currently available. The catalog is available at http://kids.strw.leidenuniv.nl/DR2 and at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/598/A107

  16. The Voronoi Tessellation Cluster Finder in 2 1 Dimensions

    SciTech Connect

    Soares-Santos, Marcelle; de Carvalho, Reinaldo R.; Annis, James; Gal, Roy R.; La Barbera, Francesco; Lopes, Paulo A.A.; Wechsler, Risa H.; Busha, Michael T.; Gerke, Brian F.; /SLAC /KIPAC, Menlo Park

    2011-06-23

    We present a detailed description of the Voronoi Tessellation (VT) cluster finder algorithm in 2+1 dimensions, which improves on past implementations of this technique. The need for cluster finder algorithms able to produce reliable cluster catalogs up to redshift 1 or beyond and down to 10{sup 13.5} solar masses is paramount especially in light of upcoming surveys aiming at cosmological constraints from galaxy cluster number counts. We build the VT in photometric redshift shells and use the two-point correlation function of the galaxies in the field to both determine the density threshold for detection of cluster candidates and to establish their significance. This allows us to detect clusters in a self-consistent way without any assumptions about their astrophysical properties. We apply the VT to mock catalogs which extend to redshift 1.4 reproducing the ?CDM cosmology and the clustering properties observed in the Sloan Digital Sky Survey data. An objective estimate of the cluster selection function in terms of the completeness and purity as a function of mass and redshift is as important as having a reliable cluster finder. We measure these quantities by matching the VT cluster catalog with the mock truth table. We show that the VT can produce a cluster catalog with completeness and purity >80% for the redshift range up to {approx}1 and mass range down to {approx}10{sup 13.5} solar masses.

  17. The Voronoi Tessellation cluster finder in 2+1 dimensions

    SciTech Connect

    Soares-Santos, Marcelle; de Carvalho, Reinaldo R.; Annis, James; Gal, Roy R.; La Barbera, Francesco; Lopes, Paulo A.A.; Wechsler, Risa H.; Busha, Michael T.; Gerke, Brian F.; /SLAC /KIPAC, Menlo Park

    2010-11-01

    We present a detailed description of the Voronoi Tessellation (VT) cluster finder algorithm in 2+1 dimensions, which improves on past implementations of this technique. The need for cluster finder algorithms able to produce reliable cluster catalogs up to redshift 1 or beyond and down to 10{sup 13.5} solar masses is paramount especially in light of upcoming surveys aiming at cosmological constraints from galaxy cluster number counts. We build the VT in photometric redshift shells and use the two-point correlation function of the galaxies in the field to both determine the density threshold for detection of cluster candidates and to establish their significance. This allows us to detect clusters in a self-consistent way without any assumptions about their astrophysical properties. We apply the VT to mock catalogs which extend to redshift 1.4 reproducing the {Lambda}CDM cosmology and the clustering properties observed in the Sloan Digital Sky Survey data. An objective estimate of the cluster selection function in terms of the completeness and purity as a function of mass and redshift is as important as having a reliable cluster finder. We measure these quantities by matching the VT cluster catalog with the mock truth table. We show that the VT can produce a cluster catalog with completeness and purity >80% for the redshift range up to {approx}1 and mass range down to {approx}10{sup 13.5} solar masses.

  18. The Andromeda Project and PHAT Stellar Clusters

    NASA Astrophysics Data System (ADS)

    Johnson, Lent C.; Seth, A.; Dalcanton, J.; Kapadia, A.; Simpson, R.; Lintott, C. J.; Skillman, E. D.; Holwerda, B.; Keel, W. C.; Fouesneau, M.; PHAT Team; Andromeda Project Team

    2013-01-01

    The Panchromatic Hubble Andromeda Treasury (PHAT) is a multicycle Hubble Space Telescope (HST) program that has imaged nearly 1/3 of the star forming disk of M31 at high spatial resolution in 6 wavelengths ranging from the UV to the NIR. This high-quality data set allows for a detailed study of the galaxy's star clusters, ranging from massive 10^6 Msolar globular clusters to objects equivalent to Galactic open clusters with masses of <10^3 Msolar. The Andromeda Project, one of the latest additions to the Zooniverse collection of citizen science projects, builds on the success of our Year 1 by-eye cluster search and enlists the public to help create one of the largest catalog of star clusters available for any galaxy. Using an interactive website, volunteers scour HST images to identify clusters, background galaxies, and image artifacts. By incorporating synthetic star clusters into the search, we will also obtain the first robust measurement of completeness for a by-eye cluster catalog. The detailed knowledge of catalog completeness is essential to assessing and interpreting age and mass distributions of Andromeda's cluster population. We present the website and compare our initial expert-derived approach with the use of citizen scientists.

  19. URLs in the OPAC: Integrating or Disintegrating Research Libraries' Catalogs

    ERIC Educational Resources Information Center

    Burke, Gerald; Germain, Carol Anne; Van Ullen, Mary K.

    2003-01-01

    Research library catalogs serve as authoritative sources of access. The increasing practice of including Web sites in the catalog, resources not under the library's control, raises new issues of the catalog's accuracy and reliability. An analysis of ARL libraries' catalogs examined the persistence of cataloged URLs. Error rates ranged from a low…

  20. Catalog of databases and reports

    SciTech Connect

    Burtis, M.D.

    1997-04-01

    This catalog provides information about the many reports and materials made available by the US Department of Energy`s (DOE`s) Global Change Research Program (GCRP) and the Carbon Dioxide Information Analysis Center (CDIAC). The catalog is divided into nine sections plus the author and title indexes: Section A--US Department of Energy Global Change Research Program Research Plans and Summaries; Section B--US Department of Energy Global Change Research Program Technical Reports; Section C--US Department of Energy Atmospheric Radiation Measurement (ARM) Program Reports; Section D--Other US Department of Energy Reports; Section E--CDIAC Reports; Section F--CDIAC Numeric Data and Computer Model Distribution; Section G--Other Databases Distributed by CDIAC; Section H--US Department of Agriculture Reports on Response of Vegetation to Carbon Dioxide; and Section I--Other Publications.

  1. Brorfelde Schmidt CCD Catalog (BSCC)

    DTIC Science & Technology

    2010-06-23

    reference stars. Errors of individual positions are about 20 to 200 mas for stars in the R = 10 to 18 mag range. External comparisons with 2MASS and SDSS ...description of the resulting cat- alog. External comparisons were performed with the Sloan Digital Sky Survey ( SDSS ) release 7 data (www.sdss.org/DR7...with 2MASS and SDSS reveal possible small systematic errors in the BSCC of up to about 30 mas. The catalog is supplemented with J, H, and Ks

  2. The NASA SBIR product catalog

    NASA Technical Reports Server (NTRS)

    Gilman, J. A.; Paige, J. B.; Schwenk, F. Carl

    1992-01-01

    The purpose of this catalog is to assist small business firms in making the community aware of products emerging from their efforts in the Small Business Innovation Research (SBIR) program. It contains descriptions of some products that have advanced into Phase 3 and others that are identified as prospective products. Both lists of products in this catalog are based on information supplied by NASA SBIR contractors in responding to an invitation to be represented in this document. Generally, all products suggested by the small firms were included in order to meet the goals of information exchange for SBIR results. Of the 444 SBIR contractors NASA queried, 137 provided information on 219 products. The catalog presents the product information in the technology areas listed in the table of contents. Within each area, the products are listed in alphabetical order by product name and are given identifying numbers. Also included is an alphabetical listing of the companies that have products described. This listing cross-references the product list and provides information on the business activity of each firm. In addition, there are three indexes: one a list of firms by states, one that lists the products according to NASA Centers that managed the SBIR projects, and one that lists the products by the relevant Technical Topics utilized in NASA's annual program solicitation under which each SBIR project was selected.

  3. NASA SBIR product catalog, 1991

    NASA Technical Reports Server (NTRS)

    1991-01-01

    This catalog is a partial list of products of NASA SBIR (Small Business Innovation Research) projects that have advanced to some degree into Phase 3. While most of the products evolved from work conducted during SBIR Phase 1 and 2, a few advanced to commercial status solely from Phase 1 activities. The catalog presents information provided to NASA by SBIR contractors who wished to have their products exhibited at Technology 2001, a NASA-sponsored technology transfer conference held in San Jose, California, on December 4, 5, and 6, 1991. The catalog presents the product information in the following technology areas: computer and communication systems; information processing and AI; robotics and automation; signal and image processing; microelectronics; electronic devices and equipment; microwave electronic devices; optical devices and lasers; advanced materials; materials processing; materials testing and NDE; materials instrumentation; aerodynamics and aircraft; fluid mechanics and measurement; heat transfer devices; refrigeration and cryogenics; energy conversion devices; oceanographic instruments; atmosphere monitoring devices; water management; life science instruments; and spacecraft electromechanical systems.

  4. Cross-Matching of Very Large Catalogs

    NASA Astrophysics Data System (ADS)

    Martynov, M. V.; Bodryagin, D. V.

    Modern astronomical catalogs and sky surveys, that contain billions of objects, belong to the "big data" data class. Existing available services have limited functionality and do not include all required and available catalogs. The software package ACrId (Astronomical Cross Identification) for cross-matching large astronomical catalogs, which uses an sphere pixelation algorithm HEALPix, ReiserFS file system and JSON-type text files for storage, has been developed at the Research Institution "Mykolaiv Astronomical Observatory".

  5. Far infrared supplement: Catalog of infrared observations

    NASA Technical Reports Server (NTRS)

    Gezari, D. Y.; Schmitz, M.; Mead, J. M.

    1984-01-01

    The Far Infrared Supplement: catalog of infrared observations summarizes all infrared astronomical observations at far infrared wavelengths published in the scientific literature between 1965 and 1982. The Supplement list contains 25% of the observations in the full catalog of infrared observations (C10), and essentially eliminates most visible stars from the listings. The Supplement is more compact than the main Catalog (it does not contain the bibliography and position index of the C10), and is intended for easy reference during astronomical observations.

  6. VizieR Online Data Catalog: The 2WHSP catalog (Chang+, 2017)

    NASA Astrophysics Data System (ADS)

    Chang, Y.-L.; Arsioli, B.; Giommi, P.; Padovani, P.

    2016-09-01

    The 2WHSP catalog is a multi-frequency catalog of HSP. It contains 1691 sources, 288 of which are newly identified HSPs, 540 are previously known HSPs, 814 are HSP candidates, 45 are HSP blazars taken from the 2FHL catalog, and 4 from TeVcat. (1 data file).

  7. A Jupyter-based Interactive Visualization Tool for Astronomical Catalogs

    NASA Astrophysics Data System (ADS)

    Yu, Weixiang; Carrasco Kind, Matias; Brunner, Robert

    2017-01-01

    The ever-growing datasets in observational astronomy have challenged scientists in many aspects, including an efficient and interactive data exploration and visualization. Many tools have been developed to confront this challenge. However, they usually focus on displaying the actual images or focus on visualizing patterns within catalogs. Here we present Vizic, a Python visualization library that builds the connection between images and catalogs through an interactive map of the sky region. Vizic visualizes catalog data over a custom background canvas using the shape, size and orientation of each object in the catalog. The displayed objects in the map are highly interactive and customizable comparing to those in the observation images. These objects can be filtered by or colored by their property values, such as redshift and/or magnitude or can be sub-selected using a lasso-like tool. In addition, Vizic also allows custom overlays to be appended dynamically on top of the image. We have implemented a minimum spanning tree overlay and a Voronoi diagram overlay. Both overlays can be generated, added or removed with just a click of a button. All the data is kept in a non relational database, and the interfaces were developed in JavaScript and Python to work on Jupyter notebooks which allows to create custom widgets, user generated scripts to analyze and plot the data selected/displayed in the interactive map.Vizic can be adopted in variety of exercises, for example, data inspection, clustering analysis, galaxy alignment studies or public data release for large surveys.

  8. Weapon container catalog. Volumes 1 & 2

    SciTech Connect

    Brown, L.A.; Higuera, M.C.

    1998-02-01

    The Weapon Container Catalog describes H-gear (shipping and storage containers, bomb hand trucks and the ancillary equipment required for loading) used for weapon programs and for special use containers. When completed, the catalog will contain five volumes. Volume 1 for enduring stockpile programs (B53, B61, B83, W62, W76, W78, W80, W84, W87, and W88) and Volume 2, Special Use Containers, are being released. The catalog is intended as a source of information for weapon program engineers and also provides historical information. The catalog also will be published on the SNL Internal Web and will undergo periodic updates.

  9. Are Earthquake Magnitudes Clustered?

    SciTech Connect

    Davidsen, Joern; Green, Adam

    2011-03-11

    The question of earthquake predictability is a long-standing and important challenge. Recent results [Phys. Rev. Lett. 98, 098501 (2007); ibid.100, 038501 (2008)] have suggested that earthquake magnitudes are clustered, thus indicating that they are not independent in contrast to what is typically assumed. Here, we present evidence that the observed magnitude correlations are to a large extent, if not entirely, an artifact due to the incompleteness of earthquake catalogs and the well-known modified Omori law. The latter leads to variations in the frequency-magnitude distribution if the distribution is constrained to those earthquakes that are close in space and time to the directly following event.

  10. Online Catalogs in Secondary School Libraries.

    ERIC Educational Resources Information Center

    Smith, Donald R.

    Computer/automated catalogs have been in use in secondary schools for some time and have numerous advantages. A public access catalog (PAC) allows networking with other libraries, use of the Boolean search function, and the retrieval of bibliographic citations from a variety of access points. Moreover, PAC's have recently become more user…

  11. The College Catalog as a Contract.

    ERIC Educational Resources Information Center

    Cherry, Robert L., Jr.; Geary, John P.

    1992-01-01

    Examines whether the college catalog and language therein constitute a legally binding contract between college and student. Categorizes catalog litigation by cases involving dismissal, granting of degrees, tuition, admission, and course offerings. The courts appear to agree that the student-college relationship is contractual in nature and that…

  12. Design for an Adaptive Library Catalog.

    ERIC Educational Resources Information Center

    Buckland, Michael K.; And Others

    1992-01-01

    Describes OASIS, a prototype adaptive online catalog implemented as a front end to the University of California MELVYL catalog. Topics addressed include the concept of adaptive retrieval systems, strategic search commands, feedback, prototyping using a front-end, the problem of excessive retrieval, commands to limit or increase search results, and…

  13. Short Films for Physics Teaching, A Catalog.

    ERIC Educational Resources Information Center

    Bluestone, Barbara Z.; Roth, Richard F.

    This annotated film catalog is a product of the Conference on Single Concept Films in College Physics Teaching sponsored by the Commission on College Physics. Both 8mm and 16mm single concept films are listed for physics and related disciplines. The catalog includes commercial, noncommercial, and foreign films. However, the film coverage was…

  14. DIRAC File Replica and Metadata Catalog

    NASA Astrophysics Data System (ADS)

    Tsaregorodtsev, A.; Poss, S.

    2012-12-01

    File replica and metadata catalogs are essential parts of any distributed data management system, which are largely determining its functionality and performance. A new File Catalog (DFC) was developed in the framework of the DIRAC Project that combines both replica and metadata catalog functionality. The DFC design is based on the practical experience with the data management system of the LHCb Collaboration. It is optimized for the most common patterns of the catalog usage in order to achieve maximum performance from the user perspective. The DFC supports bulk operations for replica queries and allows quick analysis of the storage usage globally and for each Storage Element separately. It supports flexible ACL rules with plug-ins for various policies that can be adopted by a particular community. The DFC catalog allows to store various types of metadata associated with files and directories and to perform efficient queries for the data based on complex metadata combinations. Definition of file ancestor-descendent relation chains is also possible. The DFC catalog is implemented in the general DIRAC distributed computing framework following the standard grid security architecture. In this paper we describe the design of the DFC and its implementation details. The performance measurements are compared with other grid file catalog implementations. The experience of the DFC Catalog usage in the CLIC detector project are discussed.

  15. Cataloging. ERIC Processing Manual, Section V.

    ERIC Educational Resources Information Center

    Weller, Carolyn R., Ed.

    Rules and guidelines are provided for ERIC catalogers and editors engaged in capturing bibliographic data for the documents and journal articles entered into the ERIC database. A general discussion of the principles of ERIC cataloging, definitions used, use of mandatory vs. optional data elements, etc. is provided in the Introduction. The body…

  16. Catalog of School Reform Models. First Edition.

    ERIC Educational Resources Information Center

    Northwest Regional Educational Lab., Portland, OR.

    This catalog describes 44 school-reform models. It was prepared for the U.S. Department of Education in direct response to the Comprehensive School Reform Demonstration program. The catalog's purpose is to aid schools, school districts, and states as they investigate external models that can be incorporated into comprehensive school-reform…

  17. Language and Cultural Minorities Resource Catalog.

    ERIC Educational Resources Information Center

    Agell, Charlotte, Comp.; And Others

    The revised and expanded 1992 version of the catalog lists almost 1,000 print and nonprint materials for use in elementary and secondary schools with linguistic minorities. The catalog contains 20 sections: Afghan; Asian and refugee; bilingual education; Chinese; civil rights; Poland; English as a Second Language (ESL); ESL instructional…

  18. Automated Title Page Cataloging: A Feasibility Study.

    ERIC Educational Resources Information Center

    Weibel, Stuart; And Others

    1989-01-01

    Describes the design of a prototype rule-based system for the automation of descriptive cataloging from title pages. The discussion covers the results of tests of the prototype, major impediments to automatic cataloging from title pages, and prospects for further progress. The rules implemented in the prototype are appended. (16 references)…

  19. THE 37 MONTH MAXI/GSC SOURCE CATALOG OF THE HIGH GALACTIC-LATITUDE SKY

    SciTech Connect

    Hiroi, Kazuo; Ueda, Yoshihiro; Hayashida, Masaaki; Shidatsu, Megumi; Sato, Ryosuke; Kawamuro, Taiki; Sugizaki, Mutsumi; Serino, Motoko; Matsuoka, Masaru; Mihara, Tatehiro; Nakahira, Satoshi; Tomida, Hiroshi; Ueno, Shiro; Kawai, Nobuyuki; Morii, Mikio; Nakajima, Motoki; Negoro, Hitoshi; Sakamoto, Takanori; Tsuboi, Yohko; Tsunemi, Hiroshi; and others

    2013-08-15

    We present a catalog of high Galactic-latitude (|b| > 10 Degree-Sign ) X-ray sources detected in the first 37 months of data of the Monitor of All-sky X-ray Image/Gas Slit Camera (MAXI/GSC). To achieve the best sensitivity, we develop a background model of the GSC that well reproduces the data based on the detailed on-board calibration. Source detection is performed through image fits with a Poisson likelihood algorithm. The catalog contains 500 objects detected with significances of s{sub D,4-10keV} {>=} 7 in the 4-10 keV band. The limiting sensitivity is Almost-Equal-To 7.5 Multiplication-Sign 10{sup -12} erg cm{sup -2} s{sup -1} ( Almost-Equal-To 0.6 mCrab) in the 4-10 keV band for 50% of the survey area, which is the highest ever achieved in an all-sky survey mission covering this energy band. We summarize the statistical properties of the catalog and results from cross matching with the Swift/BAT 70 month catalog, the meta-catalog of X-ray detected clusters of galaxies, and the MAXI/GSC 7 month catalog. Our catalog lists the source name (2MAXI), position and its error, detection significances and fluxes in the 4-10 keV and 3-4 keV bands, the hardness ratio, and the basic information of the likely counterpart available for 296 sources.

  20. Catalog of Infrared Observations, Third Edition

    NASA Technical Reports Server (NTRS)

    Gezari, Daniel Y.; Schmitz, Marion; Pitts, Patricia S.; Mead, Jaylee M.

    1993-01-01

    The Far Infrared Supplement contains a subset of the data in the full Catalog of Infrared Observations (all observations at wavelengths greater than 4.6 microns). The Catalog of Infrared Observations (CIO), NASA RP-1294, is a compilation of infrared astronomical observational data obtained from an extensive literature search of scientific journals and major astronomical catalogs and surveys. The literature search is complete for years 1965 through 1990 in this Third Edition. The Catalog contains about 210,000 observations of roughly 20,000 individual sources and supporting appendices. The expanded Third Edition contains coded IRAS 4-band data for all CIO sources detected by IRAS. The appendices include an atlas of infrared source positions (also included in this volume), two bibliographies of Catalog listings, and an atlas of infrared spectral ranges. The complete CIO database is available to qualified users in printed, microfiche, and magnetic-tape formats.

  1. VizieR Online Data Catalog: LMC star clusters catalog (Palma+, 2016)

    NASA Astrophysics Data System (ADS)

    Palma, T.; Gramajo, L. V.; Claria, J. J.; Lares, M.; Geisler, D.; Ahumada, A. V.

    2016-04-01

    We have compiled a catalogue including a total of 277 LMC SCs studied in the Washington system. All the photometric observations of these SCs were carried out at Cerro Tololo Inter-American Observatory (CTIO, Chile), using the Wahington C and T1 filters (Canterna 1976) and the Kron-Cousins R filter. (1 data file).

  2. Richness-based masses of rich and famous galaxy clusters

    NASA Astrophysics Data System (ADS)

    Andreon, S.

    2016-03-01

    We present a catalog of galaxy cluster masses derived by exploiting the tight correlation between mass and richness, i.e., a properly computed number of bright cluster galaxies. The richness definition adopted in this work is properly calibrated, shows a small scatter with mass, and has a known evolution, which means that we can estimate accurate (0.16 dex) masses more precisely than by adopting any other richness estimates or X-ray or SZ-based proxies based on survey data. We measured a few hundred galaxy clusters at 0.05 < z < 0.22 in the low-extinction part of the Sloan Digital Sky Survey footprint that are in the 2015 catalog of Planck-detected clusters, that have a known X-ray emission, that are in the Abell catalog, or that are among the most most cited in the literature. Diagnostic plots and direct images of clusters are individually inspected and we improved cluster centers and, when needed, we revised redshifts. Whenever possible, we also checked for indications of contamination from other clusters on the line of sight, and found ten such cases. All this information, with the derived cluster mass values, are included in the distributed value-added cluster catalog of the 275 clusters with a derived mass larger than 1014M⊙. Finally, in a technical appendix we illustrate with Planck clusters how to minimize the sensitivity of comparisons between masses listed in different catalogs to the specific overlapping of the considerd subsamples, a problem recognized but not solved in the literature. Full Table 1 is available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/587/A158A web front-end is available at the URL http://www.brera.mi.astro.it/~andreon/famous.html

  3. Adaptive cluster detection

    NASA Astrophysics Data System (ADS)

    Friedenberg, David

    2010-10-01

    The next generation of telescopes will acquire terabytes of image data on a nightly basis. Collectively, these large images will contain billions of interesting objects, which astronomers call sources . The astronomers' task is to construct a catalog detailing the coordinates and other properties of the sources. The source catalog is the primary data product for most telescopes and is an important input for testing new astrophysical theories, but to construct the catalog one must first detect the sources. Existing algorithms for catalog creation are effective at detecting sources, but do not have rigorous statistical error control. At the same time, there are several multiple testing procedures that provide rigorous error control, but they are not designed to detect sources that are aggregated over several pixels. We propose a family of techniques that do both, by providing rigorous statistical error control on the aggregate objects themselves rather than the pixels. We demonstrate the effectiveness of this approach on data from the Chandra X-ray Observatory Satellite. Our techniques effectively controls the rate of false sources, yet still detect almost all of the sources detected by procedures that do not have such rigorous error control and have the advantage of additional data in the form of follow up observations, which may not be available for upcoming large telescopes. In fact, we even detect two new sources that were missed by previous studies. The statistical methods we develop can be extended to problems beyond Astronomy, as we will illustrate with examples from Neuroimaging. We examine a series of high-resolution function Magnetic Resonance Imaging (fMRI) experiments in which the goal is to detect bands of neural activity in response to visual stimuli presented to subjects in an fMRI scanner. We extend the methods developed for Astronomy problems so that we can detect two distinct types of activation regions in the brain with a probabilistic guarantee on

  4. A Catalog of Geologic Data for the Hanford Site

    SciTech Connect

    Horton, Duane G.; Last, George V.; Gilmore, Tyler J.; Bjornstad, Bruce N.; Mackley, Rob D.

    2005-08-01

    This revision of the geologic data catalog incorporates new boreholes drilled after September 2002 as well as other older wells, particularly from the 600 Area, omitted from the earlier catalogs. Additionally, borehole geophysical log data have been added to the catalog. This version of the geologic data catalog now contains 3,519 boreholes and is current with boreholes drilled as of November 2004.

  5. Specifications for a COM Catalog Designed for Government Documents.

    ERIC Educational Resources Information Center

    Copeland, Nora S.; And Others

    Prepared in MARC format in accordance with the Ohio College Library Center (OCLC) standards, these specifications were developed at Colorado State University to catalog a group of government publications not listed in the Monthly Catalog of United States Publications. The resulting microfiche catalog produced through the OCLC Cataloging Subsystem…

  6. FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG

    SciTech Connect

    Nolan, P. L.; Ajello, M.; Allafort, A.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Abdo, A. A.; Ackermann, M.; Antolini, E.; Bonamente, E.; Atwood, W. B.; Belfiore, A.; Axelsson, M.; Baldini, L.; Bellazzini, R.; Ballet, J.; Bastieri, D.; Bignami, G. F. E-mail: Gino.Tosti@pg.infn.it E-mail: tburnett@u.washington.edu; and others

    2012-04-01

    We present the second catalog of high-energy {gamma}-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), derived from data taken during the first 24 months of the science phase of the mission, which began on 2008 August 4. Source detection is based on the average flux over the 24 month period. The second Fermi-LAT catalog (2FGL) includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and spectral fits in terms of power-law, exponentially cutoff power-law, or log-normal forms. Also included are flux measurements in five energy bands and light curves on monthly intervals for each source. Twelve sources in the catalog are modeled as spatially extended. We provide a detailed comparison of the results from this catalog with those from the first Fermi-LAT catalog (1FGL). Although the diffuse Galactic and isotropic models used in the 2FGL analysis are improved compared to the 1FGL catalog, we attach caution flags to 162 of the sources to indicate possible confusion with residual imperfections in the diffuse model. The 2FGL catalog contains 1873 sources detected and characterized in the 100 MeV to 100 GeV range of which we consider 127 as being firmly identified and 1171 as being reliably associated with counterparts of known or likely {gamma}-ray-producing source classes.

  7. Fermi Large Area Telescope Second Source Catalog

    NASA Technical Reports Server (NTRS)

    Nolan, P. L.; Abdo, A. A.; Ackermann, M.; Ajello, M; Allafort, A.; Antolini, E; Bonnell, J.; Cannon, A.; Celik O.; Corbet, R.; Davis, D. S.; DeCesar, M. E.; Ferrara, E. C.; Gehrels, N.; Harding, A. K.; Hays, E.; Johnson, T. E.; McConville, W.; McEnery, J. E; Perkins, J. S.; Racusin, J. L; Scargle, J. D.; Stephens, T. E.; Thompson, D. J.; Troja, E.

    2012-01-01

    We present the second catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), derived from data taken during the first 24 months of the science phase of the mission, which began on 2008 August 4. Source detection is based on the average flux over the 24-month period. The Second Fermi-LAT catalog (2FGL) includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and spectral fits in terms of power-law, exponentially cutoff power-law, or log-normal forms. Also included are flux measurements in 5 energy bands and light curves on monthly intervals for each source. Twelve sources in the catalog are modeled as spatially extended. We provide a detailed comparison of the results from this catalog with those from the first Fermi-LAT catalog (1FGL). Although the diffuse Galactic and isotropic models used in the 2FGL analysis are improved compared to the 1FGL catalog, we attach caution flags to 162 of the sources to indicate possible confusion with residual imperfections in the diffuse model. The 2FGL catalog contains 1873 sources detected and characterized in the 100 11eV to 100 GeV range of which we consider 127 as being firmly identified and 1171 as being reliably associated with counterparts of known or likely gamma-ray-producing source classes.

  8. Applying Machine Learning to Star Cluster Classification

    NASA Astrophysics Data System (ADS)

    Fedorenko, Kristina; Grasha, Kathryn; Calzetti, Daniela; Mahadevan, Sridhar

    2016-01-01

    Catalogs describing populations of star clusters are essential in investigating a range of important issues, from star formation to galaxy evolution. Star cluster catalogs are typically created in a two-step process: in the first step, a catalog of sources is automatically produced; in the second step, each of the extracted sources is visually inspected by 3-to-5 human classifiers and assigned a category. Classification by humans is labor-intensive and time consuming, thus it creates a bottleneck, and substantially slows down progress in star cluster research.We seek to automate the process of labeling star clusters (the second step) through applying supervised machine learning techniques. This will provide a fast, objective, and reproducible classification. Our data is HST (WFC3 and ACS) images of galaxies in the distance range of 3.5-12 Mpc, with a few thousand star clusters already classified by humans as a part of the LEGUS (Legacy ExtraGalactic UV Survey) project. The classification is based on 4 labels (Class 1 - symmetric, compact cluster; Class 2 - concentrated object with some degree of asymmetry; Class 3 - multiple peak system, diffuse; and Class 4 - spurious detection). We start by looking at basic machine learning methods such as decision trees. We then proceed to evaluate performance of more advanced techniques, focusing on convolutional neural networks and other Deep Learning methods. We analyze the results, and suggest several directions for further improvement.

  9. Microbial identification by mass cataloging

    PubMed Central

    Zhang, Zhengdong; Jackson, George W; Fox, George E; Willson, Richard C

    2006-01-01

    Background The public availability of over 180,000 bacterial 16S ribosomal RNA (rRNA) sequences has facilitated microbial identification and classification using hybridization and other molecular approaches. In their usual format, such assays are based on the presence of unique subsequences in the target RNA and require a prior knowledge of what organisms are likely to be in a sample. They are thus limited in generality when analyzing an unknown sample. Herein, we demonstrate the utility of catalogs of masses to characterize the bacterial 16S rRNA(s) in any sample. Sample nucleic acids are digested with a nuclease of known specificity and the products characterized using mass spectrometry. The resulting catalogs of masses can subsequently be compared to the masses known to occur in previously-sequenced 16S rRNAs allowing organism identification. Alternatively, if the organism is not in the existing database, it will still be possible to determine its genetic affinity relative to the known organisms. Results Ribonuclease T1 and ribonuclease A digestion patterns were calculated for 1,921 complete 16S rRNAs. Oligoribonucleotides generated by RNase T1 of length 9 and longer produce sufficient diversity of masses to be informative. In addition, individual fragments or combinations thereof can be used to recognize the presence of specific organisms in a complex sample. In this regard, 140 strains out of 1,921 organisms (7.3%) could be identified by the presence of a unique RNase T1-generated oligoribonucleotide mass. Combinations of just two and three oligoribonucleotide masses allowed 54% and 72% of the specific strains to be identified, respectively. An initial algorithm for recovering likely organisms present in complex samples is also described. Conclusion The use of catalogs of compositions (masses) of characteristic oligoribonucleotides for microbial identification appears extremely promising. RNase T1 is more useful than ribonuclease A in generating characteristic

  10. Centralized automated cataloging of health science materials in the MLC/SUNY/OCLC shared cataloging service.

    PubMed

    Raper, J E

    1977-04-01

    Since February 1976, The Medical Library Center of New York, with the assistance of the SUNY/OCLC Network, has offered, on a subscription basis, a centralized automated cataloging service to health science libraries in the greater metropolitan New York area. By using workforms and prints of OCLC record (amended by the subscribing participants), technical services personnel at the center have fed cataloging data, via a CRT terminal, into the OCLC system, which provides (1) catalog cards, received in computer filing order; (2) book card, spine, and pocket labels; (3) accessions lists; and (4) data for eventual production of book catalogs and union catalogs. The experience of the center in the development, implementation, operation, and budgeting of its shared cataloging service is discussed.

  11. Catalog of infrared observations. Part 2: Appendixes

    NASA Technical Reports Server (NTRS)

    Gezari, Daniel Y.; Schmitz, Marion; Mead, Jaylee M.

    1987-01-01

    The Catalog of Infrared Observations (CIO) is a compilation of infrared astronomical observational data obtained from an extensive literature search of astronomical journals and major astronomical catalogs and surveys. The literature searches are complete for years 1965 to 1986. Supporting appendixes are published in this part. The appendices include an atlas of infrared source positions, two bibliographies of infrared literature upon which the search was based, and, keyed to the main Catalog listings (organized alphabetically by first author, and by date), an atlas of infrared spectral ranges, and IRAS data for the CIO sources. The complete CIO database is available to qualified users in printed microfiche and magnetic tape formats.

  12. NASA Video Catalog. Supplement 12

    NASA Technical Reports Server (NTRS)

    2002-01-01

    This report lists 1878 video productions from the NASA STI Database. This issue of the NASA Video Catalog cites video productions listed in the NASA STI Database. The videos listed have been developed by the NASA centers, covering Shuttle mission press conferences; fly-bys of planets; aircraft design, testing and performance; environmental pollution; lunar and planetary exploration; and many other categories related to manned and unmanned space exploration. Each entry in the publication consists of a standard bibliographic citation accompanied by an abstract. The listing of the entries is arranged by STAR categories. A complete Table of Contents describes the scope of each category. For users with specific information, a Title Index is available. A Subject Term Index, based on the NASA Thesaurus, is also included. Guidelines for usage of NASA audio/visual material, ordering information, and order forms are also available.

  13. WGCEP Historical California Earthquake Catalog

    USGS Publications Warehouse

    Felzer, Karen R.; Cao, Tianqing

    2008-01-01

    This appendix provides an earthquake catalog for California and the surrounding area. Our goal is to provide a listing for all known M > 5.5 earthquakes that occurred from 1850-1932 and all known M > 4.0 earthquakes that occurred from 1932-2006 within the region of 31.0 to 43.0 degrees North and -126.0 to -114.0 degrees West. Some pre-1932 earthquakes 4 5, before the Northern California network was online. Some earthquakes from 1900-1932, and particularly from 1910-1932 are also based on instrumental readings, but the quality of the instrumental record and the resulting analysis are much less precise than for later listings. A partial exception is for some of the largest earthquakes, such as the San Francisco earthquake of April 18, 1906, for which global teleseismic records (Wald et al. 1993) and geodetic measurements (Thatcher et al. 1906) have been used to help determine magnitudes.

  14. Data catalog of satellite experiments

    NASA Technical Reports Server (NTRS)

    1971-01-01

    This catalog is divided into three sections: data description contains descriptions of data available at or through NSSDC as well as descriptions of the experiments and spacecraft from which the data originated; and supporting data contains brief descriptions of space environment models and programs distributed by NSSDC. Section 3 is a series of indexes that contain: (1) a listing of all spacecraft, experiment, and data descriptions presented in Section 1 plus tables indicating the period for which each spacecraft was operational; (2) an index of all spacecraft described here, identified by common names and alternate names; (3) a listing of the original experiment institutions for all experiments described; (4) a listing of the investigators associated with the experiments and their current affiliations; and (5) an index of all experiments sorted by phenomenon measured.

  15. Catalog of electronic data products

    NASA Astrophysics Data System (ADS)

    1990-07-01

    The catalog lists and describes the public-use data files produced by the National Center for Health Statistics (NCHS). More than 500 public-use data files, representing most of the NCHS data collection programs, are available for purchase and use. Public-use data files are prepared and disseminated to speed and enhance access to the full scope of data. NCHS data systems include a national vital registration program; household interview and health examination surveys; surveys of hospitals, nursing homes, physicians, and other health care providers; and other periodic or occasional data collection activities to produce a wide spectrum of health and health-related data. NCHS data users encompass all levels of government, the academic and research communities, and business. The majority of the data files released by NCHS contain microdata to allow researchers to aggregate findings in whatever format appropriate for their analyses.

  16. NASA Video Catalog. Supplement 15

    NASA Technical Reports Server (NTRS)

    2005-01-01

    This issue of the NASA Video Catalog cites video productions listed in the NASA STI Database. The videos listed have been developed by the NASA centers, covering Shuttle mission press conferences; fly-bys of planets; aircraft design, testing and performance; environmental pollution; lunar and planetary exploration; and many other categories related to manned and unmanned space exploration. Each entry in the publication consists of a standard bibliographic citation accompanied by an abstract. The Table of Contents shows how the entries are arranged by divisions and categories according to the NASA Scope and Coverage Category Guide. For users with specific information, a Title Index is available. A Subject Term Index, based on the NASA Thesaurus, is also included. Guidelines for usage of NASA audio/visual material, ordering information, and order forms are also available.

  17. Online Catalog for Filament-Sigmoid Correlation

    NASA Astrophysics Data System (ADS)

    Merriot, Ivy; Pevtsov, A.; Martens, P.

    2007-05-01

    A new online catalog correlating H-alpha filaments with SXT sigmoids gives researchers, teachers and pre-college students the ability to access digital H-alpha images online that were previously available only at the physical location of the NSO at Sunspot, NM. This web-based catalog correlates SOHO's SXT sigmoids from 1993-1998 as described in a non-online catalog created by Zach Blehm under the direction of Richard Canfield, MSU-Bozeman, with H-alpha filament activity as described by Ivy Merriot under the direction of Alexei Pevtsov, NSO, and Petrus Martens, MSU-Bozeman. The H-alpha images were digitized from film archives of the Flare Patrol Telescope at Sunspot, NM. Use of the online catalog will be demonstrated at the poster site with critical comments encouraged.

  18. The BeppoSAX WWW catalog browser.

    NASA Astrophysics Data System (ADS)

    Giommi, P.; Antonelli, L. A.; Fiore, F.; Matteuzzi, A.; Signorile, S.

    The authors present a WWW/Netscape catalog browser that has been recently developed at the BeppoSAX Science Data Center (SDC). This tool was developed with the main aim of supporting the BeppoSAX users' community in the preparation of observation proposals and as a general tool to facilitate astronomical data analysis. The SDC WWW-browser is an on-line facility that gives access to over 130 catalogs of astronomical sources, mission logs, proposals lists and other tables related to the BeppoSAX project. The capabilities of this tool range from standard multi-catalog searches to more advanced queries such as search by object class, with cross-correlation of the resulting list with any of the available catalogs. The resulting output can be retrieved as html tables or in a variety of graphical ways.

  19. ChaMP Serendipitous Galaxy Cluster Survey

    SciTech Connect

    Barkhouse, Wayne A.; Green, P.J.; Vikhlinin, A.; Kim, D.-W.; Perley, D.; Cameron, R.; Silverman, J.; Mossman, A.; Burenin, R.; Jannuzi, B.T.; Kim, M.; Smith, M.G.; Smith, R.C.; Tananbaum, H.; Wilkes, B.J.; /Harvard-Smithsonian Ctr. Astrophys. /UC, Berkeley, Astron. Dept. /SLAC /Garching, Max Planck Inst., MPE /Moscow, Space Res. Inst. /NOAO, Tucson /Cerro-Tololo InterAmerican Obs.

    2006-04-03

    We present a survey of serendipitous extended X-ray sources and optical cluster candidates from the Chandra Multi-wavelength Project (ChaMP). Our main goal is to make an unbiased comparison of X-ray and optical cluster detection methods. In 130 archival Chandra pointings covering 13 square degrees, we use a wavelet decomposition technique to detect 55 extended sources, of which 6 are nearby single galaxies. Our X-ray cluster catalog reaches a typical flux limit of about {approx} 10{sup -14} erg s{sup -1} cm{sup -2}, with a median cluster core radius of 21''. For 56 of the 130 X-ray fields, we use the ChaMP's deep NOAO/4m MOSAIC g', r', and i' imaging to independently detect cluster candidates using a Voronoi tessellation and percolation (VTP) method. Red-sequence filtering decreases the galaxy fore/background contamination and provides photometric redshifts to z {approx} 0.7. From the overlapping 6.1 square degree X-ray/optical imaging, we find 115 optical clusters (of which 11% are in the X-ray catalog) and 28 X-ray clusters (of which 46% are in the optical VTP catalog). The median redshift of the 13 X-ray/optical clusters is 0.41, and their median X-ray luminosity (0.5-2 keV) is L{sub X} = (2.65 {+-} 0.19) x 10{sup 43} ergs s{sup -1}. The clusters in our sample that are only detected in our optical data are poorer on average ({approx} 4{sigma}) than the X-ray/optically matched clusters, which may partially explain the difference in the detection fractions.

  20. Mexican Earthquakes and Tsunamis Catalog Reviewed

    NASA Astrophysics Data System (ADS)

    Ramirez-Herrera, M. T.; Castillo-Aja, R.

    2015-12-01

    Today the availability of information on the internet makes online catalogs very easy to access by both scholars and the public in general. The catalog in the "Significant Earthquake Database", managed by the National Center for Environmental Information (NCEI formerly NCDC), NOAA, allows access by deploying tabular and cartographic data related to earthquakes and tsunamis contained in the database. The NCEI catalog is the product of compiling previously existing catalogs, historical sources, newspapers, and scientific articles. Because NCEI catalog has a global coverage the information is not homogeneous. Existence of historical information depends on the presence of people in places where the disaster occurred, and that the permanence of the description is preserved in documents and oral tradition. In the case of instrumental data, their availability depends on the distribution and quality of seismic stations. Therefore, the availability of information for the first half of 20th century can be improved by careful analysis of the available information and by searching and resolving inconsistencies. This study shows the advances we made in upgrading and refining data for the earthquake and tsunami catalog of Mexico since 1500 CE until today, presented in the format of table and map. Data analysis allowed us to identify the following sources of error in the location of the epicenters in existing catalogs: • Incorrect coordinate entry • Place name erroneous or mistaken • Too general data that makes difficult to locate the epicenter, mainly for older earthquakes • Inconsistency of earthquakes and the tsunami occurrence: earthquake's epicenter located too far inland reported as tsunamigenic. The process of completing the catalogs directly depends on the availability of information; as new archives are opened for inspection, there are more opportunities to complete the history of large earthquakes and tsunamis in Mexico. Here, we also present new earthquake and

  1. National Water Quality Laboratory, 1995 services catalog

    USGS Publications Warehouse

    Timme, P.J.

    1995-01-01

    This Services Catalog contains information about field supplies and analytical services available from the National Water Quality Laboratory in Denver, Colo., and field supplies available from the Quality Water Service Unit in Ocala, Fla., to members of the U.S. Geological Survey. To assist personnel in the selection of analytical services, this catalog lists sample volume, required containers, applicable concentration range, detection level, precision of analysis, and preservation requirements for samples.

  2. Efficient Algorithms for Creating Product Catalogs

    DTIC Science & Technology

    2000-11-10

    multiple mailings are allowed, i.e., multiple catalogs can be sent to each customer. Catalog creation has important applications for e - commerce and...being gathered and warehoused by commercial enterprises. The large quantities of historical customer data and the emergence of e - commerce have...brick-and-mortar retailers and mail-order companies, as well as for new e - commerce companies. In particular, the solution to the single-mailing problem

  3. CMR Catalog Service for the Web

    NASA Technical Reports Server (NTRS)

    Newman, Doug; Mitchell, Andrew

    2016-01-01

    With the impending retirement of Global Change Master Directory (GCMD) Application Programming Interfaces (APIs) the Common Metadata Repository (CMR) was charged with providing a collection-level Catalog Service for the Web (CSW) that provided the same level of functionality as GCMD. This talk describes the capabilities of the CMR CSW API with particular reference to the support of the Committee on Earth Observation Satellites (CEOS) Working Group on Information Systems and Services (WGISS) Integrated Catalog (CWIC).

  4. Investigating the kinematics of coronal mass ejections with the automated CORIMP catalog

    NASA Astrophysics Data System (ADS)

    Byrne, Jason P.

    2015-07-01

    Studying coronal mass ejections (CMEs) in coronagraph data can be challenging due to their diffuse structure and transient nature, compounded by the variations in their dynamics, morphology and frequency of occurrence. The large amounts of data available from missions like the Solar and Heliospheric Observatory (SOHO) make manual cataloging of CMEs tedious and prone to human error, and so a robust method of detection and analysis is required and often preferred. A new coronal image processing catalog called CORIMP has been developed in an effort to achieve this, through the implementation of a dynamic background separation technique and multiscale edge detection. These algorithms together isolate and characterise CME structure in the field-of-view of the Large Angle Spectrometric Coronagraph (LASCO) onboard SOHO. CORIMP also applies a Savitzky-Golay filter, along with quadratic and linear fits, to the height-time measurements for better revealing the true CME speed and acceleration profiles across the plane-of-sky. Here we present a sample of new results from the CORIMP CME catalog, and directly compare them with the other automated catalogs of Computer Aided CME Tracking (CACTus) and Solar Eruptive Events Detection System (SEEDS), as well as the manual CME catalog at the Coordinated Data Analysis Workshop (CDAW) Data Center and a previously published study of the sample events. We further investigate a form of unsupervised machine learning by using a k-means clustering algorithm to distinguish detections of multiple CMEs that occur close together in space and time. While challenges still exist, this investigation and comparison of results demonstrate the reliability and robustness of the CORIMP catalog, proving its effectiveness at detecting and tracking CMEs throughout the LASCO dataset.

  5. Survey and Merging of Sunspot Catalogs

    NASA Astrophysics Data System (ADS)

    Lefevre, Laure; Clette, Frédéric

    2014-02-01

    In view of the construction of new sunspot-based activity indices and proxies, we conducted a comprehensive survey of all existing catalogs providing detailed parameters of photospheric features over long time intervals. Although there are a fair number of such catalogs, a global evaluation showed that they suffer from multiple limitations: finite or fragmented time coverage, limited temporal overlap between catalogs, and, more importantly, a mismatch in contents and conventions. Starting from the existing material, we demonstrate how the information from parallel catalogs can be merged to form a much more comprehensive record of sunspots and sunspot groups. To do this, we use the uniquely detailed Debrecen Photoheliographic Data (DPD), which is already a composite of several ground-based observatories and of SOHO data, and the USAF/Mount Wilson catalog from the Solar Observing Optical Network (SOON). We also outline our cross-identification method, which was needed to match the non-overlapping solar active-region nomenclature. This proved to be the most critical and subtle step when working with multiple catalogs. This effort, focused here first on the last two solar cycles, should lead to a better central database that collects all available sunspot group parameters to address future solar-cycle studies beyond the traditional sunspot-index time series [ R i].

  6. Georgia tech catalog of gravitational waveforms

    NASA Astrophysics Data System (ADS)

    Jani, Karan; Healy, James; Clark, James A.; London, Lionel; Laguna, Pablo; Shoemaker, Deirdre

    2016-10-01

    This paper introduces a catalog of gravitational waveforms from the bank of simulations by the numerical relativity effort at Georgia Tech. Currently, the catalog consists of 452 distinct waveforms from more than 600 binary black hole simulations: 128 of the waveforms are from binaries with black hole spins aligned with the orbital angular momentum, and 324 are from precessing binary black hole systems. The waveforms from binaries with non-spinning black holes have mass-ratios q = m 1/m 2 ≤ 15, and those with precessing, spinning black holes have q ≤ 8. The waveforms expand a moderate number of orbits in the late inspiral, the burst during coalescence, and the ring-down of the final black hole. Examples of waveforms in the catalog matched against the widely used approximate models are presented. In addition, predictions of the mass and spin of the final black hole by phenomenological fits are tested against the results from the simulation bank. The role of the catalog in interpreting the GW150914 event and future massive binary black-hole search in LIGO is discussed. The Georgia Tech catalog is publicly available at einstein.gatech.edu/catalog.

  7. Cluster Headache

    MedlinePlus

    Cluster headache Overview By Mayo Clinic Staff Cluster headaches, which occur in cyclical patterns or clusters, are one of the most painful types of headache. A cluster headache commonly awakens you ...

  8. Automated classification of interplanetary dust particles: Johnson Space Center Cosmic Dust Catalog Volume 15

    NASA Astrophysics Data System (ADS)

    Lasue, Jeremie; Stepinski, Tomasz; Bell, Samuel W.

    2010-05-01

    The ``Cosmic Dust Catalog,'' published by the NASA Johnson Space Center (JSC), describes thousands of interplanetary dust particles subjected to preliminary analysis and with labels indicating their origin. However, only about 80% of the particles are assigned unambiguous labels, the labels of the remaining 20% being uncertain. In addition, the Stardust mission results opened up the possibility that some particles classified as terrestrial contaminants are instead of cosmic (cometary) origin. In this article, we present a methodology for automatic classification of particles on the basis of similarity of their X-ray energy dispersive spectrometry spectra. The method is applied to the 467 particles constituting Volume 15 of the catalog. A first part of the analysis is to digitize the spectra from their scanned images. The digitized spectra are subjected to agglomerative clustering, which reveals 16 distinct clusters or compositional types of particles. The Sammon's map is used to visualize the relationship between different clusters; 6 clusters corresponding to cosmic particles and 10 clusters corresponding to terrestrial contaminants are clearly separated on the map indicating overall differences between diverse spectra of cosmic and terrestrial particles. By reconciling labels with the clustering structures, we propose the relabeling of 155 particles including the relabeling of 31 terrestrial contaminants into cosmic particles. The proposed relabeling needs to be confirmed by in-depth study of these particles. The paucity of particles with firmly determined cometary or asteroidal origin makes it difficult to establish whether the spectra based autoclassification can be utilized to discriminate between cometary and asteroidal particles. The methodology presented here can be used to classify all particles published in the catalog, as well as different samples for which comparable spectra are available.

  9. Open Access Metadata, Catalogers, and Vendors: The Future of Cataloging Records

    ERIC Educational Resources Information Center

    Flynn, Emily Alinder

    2013-01-01

    The open access (OA) movement is working to transform scholarly communication around the world, but this philosophy can also apply to metadata and cataloging records. While some notable, large academic libraries, such as Harvard University, the University of Michigan, and the University of Cambridge, released their cataloging records under OA…

  10. Cataloging Standards and Machine Translation: A Study of Reformatted ISBD Records in an Online Catalog.

    ERIC Educational Resources Information Center

    Wool, Gregory J.; And Others

    1993-01-01

    Describes a study conducted at the University of Nebraska-Lincoln library that investigated the impact of automated display on catalog records by comparing the card and online versions of records created according to ISBD (International Standard Bibliographic Description) conventions. The development of a new cataloging code is recommended.…

  11. High Frequency Cluster Radio Galaxies: Luminosity Functions and Implications for SZE Selected Cluster Samples

    NASA Astrophysics Data System (ADS)

    Gupta, N.; Saro, A.; Mohr, J. J.; Benson, B. A.; Bocquet, S.; Capasso, R.; Carlstrom, J. E.; Chiu, I.; Crawford, T. M.; de Haan, T.; Dietrich, J. P.; Gangkofner, C.; Holzapfel, W. L.; McDonald, M.; Rapetti, D.; Reichardt, C. L.

    2017-01-01

    We study the overdensity of point sources in the direction of X-ray-selected galaxy clusters from the Meta-Catalog of X-ray detected Clusters of galaxies (MCXC; = 0.14) at South Pole Telescope (SPT) and Sydney University Molonglo Sky Survey (SUMSS) frequencies. Flux densities at 95, 150 and 220 GHz are extracted from the 2500 deg2 SPT-SZ survey maps at the locations of SUMSS sources, producing a multi-frequency catalog of radio galaxies. In the direction of massive galaxy clusters, the radio galaxy flux densities at 95 and 150 GHz are biased low by the cluster Sunyaev-Zel'dovich Effect (SZE) signal, which is negative at these frequencies. We employ a cluster SZE model to remove the expected flux bias and then study these corrected source catalogs. We find that the high frequency radio galaxies are centrally concentrated within the clusters and that their luminosity functions (LFs) exhibit amplitudes that are characteristically an order of magnitude lower than the cluster LF at 843 MHz. We use the 150 GHz LF to estimate the impact of cluster radio galaxies on an SPT-SZ like survey. The radio galaxy flux typically produces a small bias on the SZE signal and has negligible impact on the observed scatter in the SZE mass-observable relation. If we assume there is no redshift evolution in the radio galaxy LF then 1.8 ± 0.7 percent of the clusters with detection significance ξ ≥ 4.5 would be lost from the sample. Allowing for redshift evolution of the form (1 + z)2.5 increases the incompleteness to 5.6 ± 1.0 percent. Improved constraints on the evolution of the cluster radio galaxy LF require a larger cluster sample extending to higher redshift.

  12. LANDSAT: Non-US standard catalog no. N-33

    NASA Technical Reports Server (NTRS)

    1975-01-01

    A catalog used for dissemination of information regarding the availability of LANDSAT imagery is presented. The Image Processing Facility of the Goddard Space Flight Center, publishes a U.S. and a Non-U.S. Standard Catalog on a monthly schedule, and the catalogs identify imagery which has been processed and input to the data files during the referenced month. The U.S. Standard Catalog includes imagery covering the continental United States, Alaska and Hawaii; the Non-U.S. Catalog identifies all the remaining coverage. Imagery adjacent to the continental U.S. and Alaska borders is included in the U.S. Standard Catalog.

  13. Catalog of Apollo experiment operations

    NASA Technical Reports Server (NTRS)

    Sullivan, Thomas A.

    1994-01-01

    This catalog reviews Apollo mission reports, preliminary science reports, technical crew debriefings, lunar surface operations plans, and various relevant lunar experiment documents, collecting engineering- and operation-specific information by experiment. It is organized by discrete experimental and equipment items emplaced or operated on the lunar surface or at zero gravity during the Apollo missions. It also attempts to summarize some of the general problems encountered on the surface and provides guidelines for the design of future lunar surface experiments with an eye toward operations. Many of the problems dealt with on the lunar surface originated from just a few novel conditions that manifested themselves in various nasty ways. Low gravity caused cables to stick up and get caught on feet, and also made it easy for instruments to tip over. Dust was a problem and caused abrasion, visibility, and thermal control difficulties. Operating in a pressure suit limited a person's activity, especially in the hands. I hope to capture with this document some of the lessons learned from the Apollo era to make the jobs of future astronauts, principle investigators, engineers, and operators of lunar experiments more productive.

  14. Version 1 of the Hubble Source Catalog

    DOE PAGES

    Whitmore, Bradley C.; Allam, Sahar S.; Budavari, Tamas; ...

    2016-05-11

    The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using SExtractor software to produce the individual source lists. The catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations, and about 160 thousand HST exposures. Source lists from Data Release 8 of the Hubble Legacy Archive are matched using an algorithm developed by Budavari & Lubow (2012). The mean photometric accuracy for the catalog as a whole is better than 0.10 mag, with relative accuracy as good as 0.02 mag in certain circumstances (e.g., bright isolated stars). The relative astrometric residuals are typically within 10 mas, with a value for the mode (i.e., most common value) of 2.3 mas. The absolute astrometric accuracy is better thanmore » $$\\sim$$0.1 arcsec for most sources, but can be much larger for a fraction of fields that could not be matched to the PanSTARRS, SDSS, or 2MASS reference systems. In this paper we describe the database design with emphasis on those aspects that enable the users to fully exploit the catalog while avoiding common misunderstandings and potential pitfalls. Here, we provide usage examples to illustrate some of the science capabilities and data quality characteristics, and briefly discuss plans for future improvements to the Hubble Source Catalog.« less

  15. Version 1 of the Hubble Source Catalog

    NASA Astrophysics Data System (ADS)

    Whitmore, Bradley C.; Allam, Sahar S.; Budavári, Tamás; Casertano, Stefano; Downes, Ronald A.; Donaldson, Thomas; Fall, S. Michael; Lubow, Stephen H.; Quick, Lee; Strolger, Louis-Gregory; Wallace, Geoff; White, Richard L.

    2016-06-01

    The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope (HST) by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive (HLA) into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using SExtractor software to produce the individual source lists. The catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations, and about 160,000 HST exposures. Source lists from Data Release 8 of the HLA are matched using an algorithm developed by Budavári & Lubow. The mean photometric accuracy for the catalog as a whole is better than 0.10 mag, with relative accuracy as good as 0.02 mag in certain circumstances (e.g., bright isolated stars). The relative astrometric residuals are typically within 10 mas, with a value for the mode (i.e., most common value) of 2.3 mas. The absolute astrometric accuracy is better than 0''\\hspace{-0.5em}. 1 for most sources, but can be much larger for a fraction of fields that could not be matched to the PanSTARRS, SDSS, or 2MASS reference systems. In this paper we describe the database design with emphasis on those aspects that enable the users to fully exploit the catalog while avoiding common misunderstandings and potential pitfalls. We provide usage examples to illustrate some of the science capabilities and data quality characteristics, and briefly discuss plans for future improvements to the Hubble Source Catalog.

  16. Version 1 of the Hubble Source Catalog

    SciTech Connect

    Whitmore, Bradley C.; Allam, Sahar S.; Budavari, Tamas; Casertano, Stefano; Downes, Ronald A.; Donaldson, Thomas; Fall, S. Michael; Lubow, Stephen H.; Quick, Lee; Strolger, Louis -Gregory; Wallace, Geoff; White, Richard L.

    2016-05-11

    The Hubble Source Catalog is designed to help optimize science from the Hubble Space Telescope by combining the tens of thousands of visit-based source lists in the Hubble Legacy Archive into a single master catalog. Version 1 of the Hubble Source Catalog includes WFPC2, ACS/WFC, WFC3/UVIS, and WFC3/IR photometric data generated using SExtractor software to produce the individual source lists. The catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations, and about 160 thousand HST exposures. Source lists from Data Release 8 of the Hubble Legacy Archive are matched using an algorithm developed by Budavari & Lubow (2012). The mean photometric accuracy for the catalog as a whole is better than 0.10 mag, with relative accuracy as good as 0.02 mag in certain circumstances (e.g., bright isolated stars). The relative astrometric residuals are typically within 10 mas, with a value for the mode (i.e., most common value) of 2.3 mas. The absolute astrometric accuracy is better than $\\sim$0.1 arcsec for most sources, but can be much larger for a fraction of fields that could not be matched to the PanSTARRS, SDSS, or 2MASS reference systems. In this paper we describe the database design with emphasis on those aspects that enable the users to fully exploit the catalog while avoiding common misunderstandings and potential pitfalls. Here, we provide usage examples to illustrate some of the science capabilities and data quality characteristics, and briefly discuss plans for future improvements to the Hubble Source Catalog.

  17. An Open Catalog for Supernova Data

    NASA Astrophysics Data System (ADS)

    Guillochon, James; Parrent, Jerod; Kelley, Luke Zoltan; Margutti, Raffaella

    2017-01-01

    We present the Open Supernova Catalog, an online collection of observations and metadata for presently 36,000+ supernovae and related candidates. The catalog is freely available on the web (https://sne.space), with its main interface having been designed to be a user-friendly, rapidly searchable table accessible on desktop and mobile devices. In addition to the primary catalog table containing supernova metadata, an individual page is generated for each supernova, which displays its available metadata, light curves, and spectra spanning X-ray to radio frequencies. The data presented in the catalog is automatically rebuilt on a daily basis and is constructed by parsing several dozen sources, including the data presented in the supernova literature and from secondary sources such as other web-based catalogs. Individual supernova data is stored in the hierarchical, human- and machine-readable JSON format, with the entirety of each supernova’s data being contained within a single JSON file bearing its name. The setup we present here, which is based on open-source software maintained via git repositories hosted on github, enables anyone to download the entirety of the supernova data set to their home computer in minutes, and to make contributions of their own data back to the catalog via git. As the supernova data set continues to grow, especially in the upcoming era of all-sky synoptic telescopes, which will increase the total number of events by orders of magnitude, we hope that the catalog we have designed will be a valuable tool for the community to analyze both historical and contemporary supernovae.

  18. The Globular cluster system of M31.

    NASA Astrophysics Data System (ADS)

    Galleti, S.; Buzzoni, A.; Federici, L.; Fusi Pecci, F.

    I present here some results of the extensive revision work of M31 confirmed and candidate globular clusters. The Revised Bologna Catalog, RBC, www.bo.astro.it/M31 is currently the largest and most complete database available online. Two spectroscopic surveys are in progress to confirm RBC cluster candidates as well as newly identified candidates at large distances from the center of M31. I have also studied a subsample of bright and young (age < 2 Gyr) clusters in M31 that doesn't appear to have any counterpart in the Milky Way.

  19. Multicolor CCD Photometry of the Open Cluster IC361

    DTIC Science & Technology

    2010-01-01

    journal Volume 19 Numbers 1/2 2010 Contents V. Straizys, A. Kazlauskas. Young stars in the Camelopardalis dust and molecular clouds. VI. YSOs...Vilnius + I system for 7250 stars down to 1= 19.6 mag has been obtained in the 20’ x 26’ field of the open cluster IC 361 in Camelopardalis . The catalog...1= 19.6 mag has been obtained in the 20’ x 26’ field of the open cluster IC 361 in Camelopardalis . The catalog of 1420 stars down to V ~ 18.5 mag

  20. GALAXY SCALE LENSES IN THE RCS2. I. FIRST CATALOG OF CANDIDATE STRONG LENSES

    SciTech Connect

    Anguita, T.; Barrientos, L. F.; Gladders, M. D.; Faure, C.; Yee, H. K. C.; Gilbank, D. G.

    2012-04-01

    We present the first galaxy scale lens catalog from the second Red-Sequence Cluster Survey. The catalog contains 60 lensing system candidates comprised of Luminous Red Galaxy (LRG) lenses at 0.2 {approx}< z {approx}< 0.5 surrounded by blue arcs or apparent multiple images of background sources. The catalog is a valuable complement to previous galaxy-galaxy lens catalogs as it samples an intermediate lens redshift range and is composed of bright sources and lenses that allow easy follow-up for detailed analysis. Mass and mass-to-light ratio estimates reveal that the lens galaxies are massive ( M-bar {approx} 5.5 Multiplication-Sign 10{sup 11} [M{sub Sun} h{sup -1}]) and rich in dark matter (M/L-bar{approx} 14 [M{sub Sun }/L{sub Sun ,B} h]). Even though a slight increasing trend in the mass-to-light ratio is observed from z = 0.2 to z = 0.5, current redshift and light profile measurements do not allow stringent constraints on the mass-to-light ratio evolution of LRGs.

  1. SDSS DR7 WHITE DWARF CATALOG

    SciTech Connect

    Kleinman, S. J.; Nitta, A.; Kepler, S. O.; Pelisoli, Ingrid; Pecanha, Viviane; Costa, J. E. S.; Koester, D.; Krzesinski, J.; Dufour, P.; Lachapelle, F.-R.; Bergeron, P.; Yip, Ching-Wa; Harris, Hugh C.; Eisenstein, Daniel J.; Althaus, L.; Corsico, A.

    2013-01-15

    We present a new catalog of spectroscopically confirmed white dwarf stars from the Sloan Digital Sky Survey (SDSS) Data Release 7 spectroscopic catalog. We find 20,407 white dwarf spectra, representing 19,712 stars, and provide atmospheric model fits to 14,120 DA and 1011 DB white dwarf spectra from 12,843 and 923 stars, respectively. These numbers represent more than a factor of two increase in the total number of white dwarf stars from the previous SDSS white dwarf catalogs based on DR4 data. Our distribution of subtypes varies from previous catalogs due to our more conservative, manual classifications of each star in our catalog, supplementing our automatic fits. In particular, we find a large number of magnetic white dwarf stars whose small Zeeman splittings mimic increased Stark broadening that would otherwise result in an overestimated log g if fit as a non-magnetic white dwarf. We calculate mean DA and DB masses for our clean, non-magnetic sample and find the DB mean mass is statistically larger than that for the DAs.

  2. COSMIC: Software catalog 1991 edition diskette format

    NASA Technical Reports Server (NTRS)

    1991-01-01

    The PC edition of the annual COSMIC Software contains descriptions of the over 1,200 computer programs available for use within the United States as of January 1, 1991. By using the PC version of the catalog, it is possible to conduct extensive searches of the software inventory for programs that meet specific criteria. Elements such as program keywords, hardware specifications, source code languages, and title acronyms can be used for the basis of such searches. After isolating those programs that might be of best interest to the user, it is then possible to either view at the monitor, or generate a hardcopy listing of all information on those packages. In addition to the program elements that the user can search on, information such as total program size, distribution media, and program price, as well as extensive abstracts on the program, are also available to the user at this time. Another useful feature of the catalog allows for the retention of programs that meet certain search criteria between individual sessions of using the catalog. This allows users to save the information on those programs that are of interest to them in different areas of application. They can then recall a specific collection of programs for information retrieval or further search reduction if desired. In addition, this version of the catalog is adaptable to a network/shared resource environment, allowing multiple users access to a single copy of the catalog database simultaneously.

  3. Catalog of infrared observations. Part 1: Data

    NASA Technical Reports Server (NTRS)

    Gezari, Daniel Y.; Schmitz, Marion; Mead, Jaylee M.

    1987-01-01

    The Catalog of Infrared Observations (CIO) is a compilation of infrared astronomical observational data obtained from an extensive literature search of astronomical journals and major astronomical catalogs and surveys. The literature searches are complete for 1965 through 1986 in this Second Edition. The Catalog is published in two parts, with the observational data (roughly 200,000 observations of 20,000 individual sources) listed in Part I, and supporting appendices in Part II. The expanded Second Edition contains a new feature: complete IRAS 4-band data for all CIO sources detected, listed with the main Catalog observations, as well as in complete detail in the Appendix. The appendices include an atlas of infrared source positions, two bibliographies of infrared literature upon which the search was based, and, keyed to the main Catalog listings (organized alphabetically by author and then chronologically), an atlas of infrared spectral ranges, and IRAS data from the CIO sources. The complete CIO database is available to qualified users in printed microfiche and magnetic tape formats.

  4. Government documents and the online catalog.

    PubMed

    Lynch, F H; Lasater, M C

    1990-01-01

    Prior to planning for implementing the NOTIS system, the Vanderbilt Medical Center Library had not fully cataloged its government publications, and records for these materials were not in machine-readable format. A decision was made that patrons should need to look in only one place for all library materials, including the Health and Human Services Department publications received each year from the central library's Government Documents Unit. Beginning in 1985, these publications were added to the library's database, and the entire 7,200-piece collection is now in the online catalog. Working with these publications has taught the library much about the advantages and disadvantages of cataloging government documents in an online environment. It was found that OCLC cataloging copy is eventually available for most titles, although only about 10% of the records have MeSH headings. Staff time is the major expenditure; problems are caused by documents' irregular nature, frequent format changes, and difficult authority work. Since their addition to the online catalog, documents are used more and the library has better control.

  5. A White Spruce Gene Catalog for Conifer Genome Analyses1[W][OA

    PubMed Central

    Rigault, Philippe; Boyle, Brian; Lepage, Pierre; Cooke, Janice E.K.; Bousquet, Jean; MacKay, John J.

    2011-01-01

    Several angiosperm plant genomes, including Arabidopsis (Arabidopsis thaliana), rice (Oryza sativa), poplar (Populus trichocarpa), and grapevine (Vitis vinifera), have been sequenced, but the lack of reference genomes in gymnosperm phyla reduces our understanding of plant evolution and restricts the potential impacts of genomics research. A gene catalog was developed for the conifer tree Picea glauca (white spruce) through large-scale expressed sequence tag sequencing and full-length cDNA sequencing to facilitate genome characterizations, comparative genomics, and gene mapping. The resource incorporates new and publicly available sequences into 27,720 cDNA clusters, 23,589 of which are represented by full-length insert cDNAs. Expressed sequence tags, mate-pair cDNA clone analysis, and custom sequencing were integrated through an iterative process to improve the accuracy of clustering outcomes. The entire catalog spans 30 Mb of unique transcribed sequence. We estimated that the P. glauca nuclear genome contains up to 32,520 transcribed genes owing to incomplete, partially sequenced, and unsampled transcripts and that its transcriptome could span up to 47 Mb. These estimates are in the same range as the Arabidopsis and rice transcriptomes. Next-generation methods confirmed and enhanced the catalog by providing deeper coverage for rare transcripts, by extending many incomplete clusters, and by augmenting the overall transcriptome coverage to 38 Mb of unique sequence. Genomic sample sequencing at 8.5% of the 19.8-Gb P. glauca genome identified 1,495 clusters representing highly repeated sequences among the cDNA clusters. With a conifer transcriptome in full view, functional and protein domain annotations clearly highlighted the divergences between conifers and angiosperms, likely reflecting their respective evolutionary paths. PMID:21730200

  6. THE MEMBERSHIP AND DISTANCE OF THE OPEN CLUSTER COLLINDER 419

    SciTech Connect

    Roberts, Lewis C.; Gies, Douglas R.; Parks, J. Robert; Grundstrom, Erika D.; McSwain, M. Virginia; Berger, David H.; Mason, Brian D.; Ten Brummelaar, Theo A.; Turner, Nils H. E-mail: gies@chara.gsu.ed E-mail: erika.grundstrom@vanderbilt.ed E-mail: dberger@sysplan.co E-mail: theo@chara-array.or

    2010-09-15

    The young open cluster Collinder 419 surrounds the massive O star, HD 193322, that is itself a remarkable multiple star system containing at least four components. Here we present a discussion of the cluster distance based upon new spectral classifications of the brighter members, UBV photometry, and an analysis of astrometric and photometric data from the third U. S. Naval Observatory CCD Astrograph Catalog and Two Micron All Sky Survey Catalog. We determine an average cluster reddening of E(B - V) = 0.37 {+-} 0.05 mag and a cluster distance of 741 {+-} 36 pc. The cluster probably contains some very young stars that may include a reddened M3 III star, IRAS 20161+4035.

  7. The Membership and Distance of the Open Cluster Collinder 419

    NASA Technical Reports Server (NTRS)

    Roberts, Lewis C., Jr.; Gies, Douglas R.; Parks, J. Robert; Grundstrom, Erika D.; McSwain, M. Virginia; Berger, David H.; Mason, Brian D.; tenBrummelaar, Theo A.; Turner, Nils H.

    2010-01-01

    The young open cluster Collinder 419 surrounds the massive O star, HD 193322, that is itself a remarkable multiple star system containing at least four components. Here we present a discussion of the cluster distance based upon new spectral classifications of the brighter members, UBV photometry, and an analysis of astrometric and photometric data from the third U. S. Naval Observatory CCD Astrograph Catalog and Two Micron All Sky Survey Catalog. We determine an average cluster reddening of E(B - V) = 0.37 +/-.05 mag and a cluster distance of 741 plus or minus 36 pc. The cluster probably contains some very young stars that may include a reddened M3 III star, IRAS 20161+4035.

  8. Panchromatic Hubble Andromeda Treasury. XIV. The Period-Age Relationship of Cepheid Variables in M31 Star Clusters

    NASA Astrophysics Data System (ADS)

    Senchyna, Peter; Johnson, L. Clifton; Dalcanton, Julianne J.; Beerman, Lori C.; Fouesneau, Morgan; Dolphin, Andrew; Williams, Benjamin F.; Rosenfield, Philip; Larsen, Søren S.

    2015-11-01

    We present a sample of 11 M31 Cepheids in stellar clusters, derived from the overlap of the Panchromatic Hubble Andromeda Treasury cluster catalog and the Pan-STARRS1 (PS1) disk Cepheid catalog. After identifying the PS1 Cepheids in the Hubble Space Telescope (HST) catalog, we calibrate the PS1 mean magnitudes using the higher resolution HST photometry, revealing up to 1 mag offsets due to crowding effects in the ground-based catalog. We measure ages of the clusters by performing single-age stellar population fits to their color-magnitude diagrams excluding their Cepheids. From these cluster age measurements, we derive an empirical period-age relation which agrees well with the existing literature values. By confirming this relation for M31 Cepheids, we justify its application in high-precision pointwise age estimation across M31.

  9. SKYMAP system description: Star catalog data base generation and utilization

    NASA Technical Reports Server (NTRS)

    Gottlieb, D. M.

    1979-01-01

    The specifications, design, software description, and use of the SKYMAP star catalog system are detailed. The SKYMAP system was developed to provide an accurate and complete catalog of all stars with blue or visual magnitudes brighter than 9.0 for use by attitude determination programs. Because of the large number of stars which are brighter than 9.0 magnitude, efficient techniques of manipulating and accessing the data were required. These techniques of staged distillation of data from a Master Catalog to a Core Catalog, and direct access of overlapping zone catalogs, form the basis of the SKYMAP system. The collection and tranformation of data required to produce the Master Catalog data base is described. The data flow through the main programs and levels of star catalogs is detailed. The mathematical and logical techniques for each program and the format of all catalogs are documented.

  10. Cataloging audiovisual materials: a new dimension.

    PubMed Central

    Knotts, M A; Mueller, D

    1975-01-01

    A new more comprehensive system for cataloging audiovisual materials is described. Existing audiovisual cataloging systems contain mostly descriptive information, publishers' or producers' summaries, and order information. This paper discusses the addition of measurable learning objectives to this standard information, thereby enabling the potential user to determine what can be learned from a particular audiovisual unit. The project included media in nursing only. A committee of faculty and students from the University of Alabama in Birmingham School of Nursing reviewed the materials. The system was field-tested at nursing schools throughout Alabama; the schools offered four different types of programs. The system and its sample product, the AVLOC catalog, were also evaluated by medical librarians, media specialists, and other nursing instructors throughout the United States. PMID:50106

  11. Dynamical Mass Measurements of Contaminated Galaxy Clusters Using Machine Learning

    NASA Astrophysics Data System (ADS)

    Ntampaka, Michelle; Trac, Hy; Sutherland, Dougal; Fromenteau, Sebastien; Poczos, Barnabas; Schneider, Jeff

    2016-01-01

    Galaxy clusters are a rich source of information for examining fundamental astrophysical processes and cosmological parameters, however, employing clusters as cosmological probes requires accurate mass measurements derived from cluster observables. We study dynamical mass measurements of galaxy clusters contaminated by interlopers, and show that a modern machine learning (ML) algorithm can predict masses by better than a factor of two compared to a standard scaling relation approach. We create a mock catalog from Multidark's publicly-available N-body MDPL1 simulation where a simple cylindrical cut around the cluster center allows interlopers to contaminate the clusters. In the standard approach, we use a power law scaling relation to infer cluster mass from galaxy line of sight (LOS) velocity dispersion. The presence of interlopers in the catalog produces a wide, flat fractional mass error distribution, with width = 2.13. We employ the Support Distribution Machine (SDM) class of algorithms to learn from distributions of data to predict single values. Applied to distributions of galaxy observables such as LOS velocity and projected distance from the cluster center, SDM yields better than a factor-of-two improvement (width = 0.67). Remarkably, SDM applied to contaminated clusters is better able to recover masses than even a scaling relation approach applied to uncontaminated clusters. We show that the SDM method more accurately reproduces the cluster mass function, making it a valuable tool for employing cluster observations to evaluate cosmological models.

  12. The Swift AGN and Cluster Survey. II. Cluster Confirmation with SDSS Data

    NASA Astrophysics Data System (ADS)

    Griffin, Rhiannon D.; Dai, Xinyu; Kochanek, Christopher S.; Bregman, Joel N.

    2016-01-01

    We study 203 (of 442) Swift AGN and Cluster Survey extended X-ray sources located in the SDSS DR8 footprint to search for galaxy over-densities in three-dimensional space using SDSS galaxy photometric redshifts and positions near the Swift cluster candidates. We find 104 Swift clusters with a >3σ galaxy over-density. The remaining targets are potentially located at higher redshifts and require deeper optical follow-up observations for confirmation as galaxy clusters. We present a series of cluster properties including the redshift, brightest cluster galaxy (BCG) magnitude, BCG-to-X-ray center offset, optical richness, and X-ray luminosity. We also detect red sequences in ˜85% of the 104 confirmed clusters. The X-ray luminosity and optical richness for the SDSS confirmed Swift clusters are correlated and follow previously established relations. The distribution of the separations between the X-ray centroids and the most likely BCG is also consistent with expectation. We compare the observed redshift distribution of the sample with a theoretical model, and find that our sample is complete for z ≲ 0.3 and is still 80% complete up to z ≃ 0.4, consistent with the SDSS survey depth. These analysis results suggest that our Swift cluster selection algorithm has yielded a statistically well-defined cluster sample for further study of cluster evolution and cosmology. We also match our SDSS confirmed Swift clusters to existing cluster catalogs, and find 42, 23, and 1 matches in optical, X-ray, and Sunyaev-Zel’dovich catalogs, respectively, and so the majority of these clusters are new detections.

  13. THE SWIFT AGN AND CLUSTER SURVEY. II. CLUSTER CONFIRMATION WITH SDSS DATA

    SciTech Connect

    Griffin, Rhiannon D.; Dai, Xinyu; Kochanek, Christopher S.; Bregman, Joel N. E-mail: xdai@ou.edu E-mail: jbregman@umich.edu

    2016-01-15

    We study 203 (of 442) Swift AGN and Cluster Survey extended X-ray sources located in the SDSS DR8 footprint to search for galaxy over-densities in three-dimensional space using SDSS galaxy photometric redshifts and positions near the Swift cluster candidates. We find 104 Swift clusters with a >3σ galaxy over-density. The remaining targets are potentially located at higher redshifts and require deeper optical follow-up observations for confirmation as galaxy clusters. We present a series of cluster properties including the redshift, brightest cluster galaxy (BCG) magnitude, BCG-to-X-ray center offset, optical richness, and X-ray luminosity. We also detect red sequences in ∼85% of the 104 confirmed clusters. The X-ray luminosity and optical richness for the SDSS confirmed Swift clusters are correlated and follow previously established relations. The distribution of the separations between the X-ray centroids and the most likely BCG is also consistent with expectation. We compare the observed redshift distribution of the sample with a theoretical model, and find that our sample is complete for z ≲ 0.3 and is still 80% complete up to z ≃ 0.4, consistent with the SDSS survey depth. These analysis results suggest that our Swift cluster selection algorithm has yielded a statistically well-defined cluster sample for further study of cluster evolution and cosmology. We also match our SDSS confirmed Swift clusters to existing cluster catalogs, and find 42, 23, and 1 matches in optical, X-ray, and Sunyaev–Zel’dovich catalogs, respectively, and so the majority of these clusters are new detections.

  14. 1990 National Water Quality Laboratory Services Catalog

    USGS Publications Warehouse

    Pritt, Jeffrey; Jones, Berwyn E.

    1989-01-01

    PREFACE This catalog provides information about analytical services available from the National Water Quality Laboratory (NWQL) to support programs of the Water Resources Division of the U.S. Geological Survey. To assist personnel in the selection of analytical services, the catalog lists cost, sample volume, applicable concentration range, detection level, precision of analysis, and preservation techniques for samples to be submitted for analysis. Prices for services reflect operationa1 costs, the complexity of each analytical procedure, and the costs to ensure analytical quality control. The catalog consists of five parts. Part 1 is a glossary of terminology; Part 2 lists the bottles, containers, solutions, and other materials that are available through the NWQL; Part 3 describes the field processing of samples to be submitted for analysis; Part 4 describes analytical services that are available; and Part 5 contains indices of analytical methodology and Chemical Abstract Services (CAS) numbers. Nomenclature used in the catalog is consistent with WATSTORE and STORET. The user is provided with laboratory codes and schedules that consist of groupings of parameters which are measured together in the NWQL. In cases where more than one analytical range is offered for a single element or compound, different laboratory codes are given. Book 5 of the series 'Techniques of Water Resources Investigations of the U.S. Geological Survey' should be consulted for more information about the analytical procedures included in the tabulations. This catalog supersedes U.S. Geological Survey Open-File Report 86-232 '1986-87-88 National Water Quality Laboratory Services Catalog', October 1985.

  15. Fermi Large Area Telescope First Source Catalog

    NASA Astrophysics Data System (ADS)

    Abdo, A. A.; Ackermann, M.; Ajello, M.; Allafort, A.; Antolini, E.; Atwood, W. B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Baughman, B. M.; Bechtol, K.; Bellazzini, R.; Belli, F.; Berenji, B.; Bisello, D.; Blandford, R. D.; Bloom, E. D.; Bonamente, E.; Bonnell, J.; Borgland, A. W.; Bouvier, A.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Burnett, T. H.; Busetto, G.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Campana, R.; Canadas, B.; Caraveo, P. A.; Carrigan, S.; Casandjian, J. M.; Cavazzuti, E.; Ceccanti, M.; Cecchi, C.; Çelik, Ö.; Charles, E.; Chekhtman, A.; Cheung, C. C.; Chiang, J.; Cillis, A. N.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Conrad, J.; Corbet, R.; Davis, D. S.; DeKlotz, M.; den Hartog, P. R.; Dermer, C. D.; de Angelis, A.; de Luca, A.; de Palma, F.; Digel, S. W.; Dormody, M.; Silva, E. do Couto e.; Drell, P. S.; Dubois, R.; Dumora, D.; Fabiani, D.; Farnier, C.; Favuzzi, C.; Fegan, S. J.; Ferrara, E. C.; Focke, W. B.; Fortin, P.; Frailis, M.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Gehrels, N.; Germani, S.; Giavitto, G.; Giebels, B.; Giglietto, N.; Giommi, P.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Grenier, I. A.; Grondin, M.-H.; Grove, J. E.; Guillemot, L.; Guiriec, S.; Gustafsson, M.; Hadasch, D.; Hanabata, Y.; Harding, A. K.; Hayashida, M.; Hays, E.; Healey, S. E.; Hill, A. B.; Horan, D.; Hughes, R. E.; Iafrate, G.; Jóhannesson, G.; Johnson, A. S.; Johnson, R. P.; Johnson, T. J.; Johnson, W. N.; Kamae, T.; Katagiri, H.; Kataoka, J.; Kawai, N.; Kerr, M.; Knödlseder, J.; Kocevski, D.; Kuss, M.; Lande, J.; Landriu, D.; Latronico, L.; Lee, S.-H.; Lemoine-Goumard, M.; Lionetto, A. M.; Llena Garde, M.; Longo, F.; Loparco, F.; Lott, B.; Lovellette, M. N.; Lubrano, P.; Madejski, G. M.; Makeev, A.; Marangelli, B.; Marelli, M.; Massaro, E.; Mazziotta, M. N.; McConville, W.; McEnery, J. E.; Michelson, P. F.; Minuti, M.; Mitthumsiri, W.; Mizuno, T.; Moiseev, A. A.; Mongelli, M.; Monte, C.; Monzani, M. E.; Moretti, E.; Morselli, A.; Moskalenko, I. V.; Murgia, S.; Nakajima, H.; Nakamori, T.; Naumann-Godo, M.; Nolan, P. L.; Norris, J. P.; Nuss, E.; Ohno, M.; Ohsugi, T.; Omodei, N.; Orlando, E.; Ormes, J. F.; Ozaki, M.; Paccagnella, A.; Paneque, D.; Panetta, J. H.; Parent, D.; Pelassa, V.; Pepe, M.; Pesce-Rollins, M.; Pinchera, M.; Piron, F.; Porter, T. A.; Poupard, L.; Rainò, S.; Rando, R.; Ray, P. S.; Razzano, M.; Razzaque, S.; Rea, N.; Reimer, A.; Reimer, O.; Reposeur, T.; Ripken, J.; Ritz, S.; Rochester, L. S.; Rodriguez, A. Y.; Romani, R. W.; Roth, M.; Sadrozinski, H. F.-W.; Salvetti, D.; Sanchez, D.; Sander, A.; Saz Parkinson, P. M.; Scargle, J. D.; Schalk, T. L.; Scolieri, G.; Sgrò, C.; Shaw, M. S.; Siskind, E. J.; Smith, D. A.; Smith, P. D.; Spandre, G.; Spinelli, P.; Starck, J.-L.; Stephens, T. E.; Striani, E.; Strickman, M. S.; Strong, A. W.; Suson, D. J.; Tajima, H.; Takahashi, H.; Takahashi, T.; Tanaka, T.; Thayer, J. B.; Thayer, J. G.; Thompson, D. J.; Tibaldo, L.; Tibolla, O.; Tinebra, F.; Torres, D. F.; Tosti, G.; Tramacere, A.; Uchiyama, Y.; Usher, T. L.; Van Etten, A.; Vasileiou, V.; Vilchez, N.; Vitale, V.; Waite, A. P.; Wallace, E.; Wang, P.; Watters, K.; Winer, B. L.; Wood, K. S.; Yang, Z.; Ylinen, T.; Ziegler, M.; Fermi LAT Collaboration

    2010-06-01

    We present a catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), during the first 11 months of the science phase of the mission, which began on 2008 August 4. The First Fermi-LAT catalog (1FGL) contains 1451 sources detected and characterized in the 100 MeV to 100 GeV range. Source detection was based on the average flux over the 11 month period, and the threshold likelihood Test Statistic is 25, corresponding to a significance of just over 4σ. The 1FGL catalog includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and power-law spectral fits as well as flux measurements in five energy bands for each source. In addition, monthly light curves are provided. Using a protocol defined before launch we have tested for several populations of gamma-ray sources among the sources in the catalog. For individual LAT-detected sources we provide firm identifications or plausible associations with sources in other astronomical catalogs. Identifications are based on correlated variability with counterparts at other wavelengths, or on spin or orbital periodicity. For the catalogs and association criteria that we have selected, 630 of the sources are unassociated. Care was taken to characterize the sensitivity of the results to the model of interstellar diffuse gamma-ray emission used to model the bright foreground, with the result that 161 sources at low Galactic latitudes and toward bright local interstellar clouds are flagged as having properties that are strongly dependent on the model or as potentially being due to incorrectly modeled structure in the Galactic diffuse emission.

  16. VizieR Online Data Catalog: Environmental COntext (ECO) catalog (Moffett+, 2015)

    NASA Astrophysics Data System (ADS)

    Moffett, A. J.; Kannappan, S. J.; Berlind, A. A.; Eckert, K. D.; Stark, D. V.; Hendel, D.; Norris, M. A.; Grogin, N. A.

    2016-02-01

    The ECO catalog represents a cross match between sources with measured redshifts found in the UZC (Updated Zwicky Catalog, Falco et al. 1999, J/PASP/111/438), SDSS (including data releases 6, 7, and 8; see II/294 and V/139), HyperLEDA (VII/237), RESOLVE (S. J. Kannappan et al. 2015, in preparation), GAMA (Driver et al. 2011, J/MNRAS/413/971), 2dF (Colless et al. 2001, VII/250), and 6dF (Jones et al. 2009, VII/259) catalogs with a 15" matching radius on sky. See section 2.1. (1 data file).

  17. CD-ROM Catalogs--The State of the Art.

    ERIC Educational Resources Information Center

    Beiser, Karl

    1988-01-01

    Reviews five CD-ROM catalogs: (1) Auto-Graphics Impact; (2) Brodart LePac; (3) GRC LaserGuide; (4) Library Corporation Intelligent Catalog; and (5) MARCIVE Pac. General guidelines for selecting a CD-ROM catalog are discussed, and vendor addresses and telephone numbers are listed. (MES)

  18. The Catalog in the Courtroom: From Shield to Sword?

    ERIC Educational Resources Information Center

    Davenport, David

    1985-01-01

    Legal issues concerning the content and use of the college catalog are reviewed, including the catalog's changing role as a consumer document, misrepresentation, violation of statute, breach of contract, court interpretations, and remedies. Colleges are cautioned to take great care in using catalogs, for legal and administrative reasons. (MSE)

  19. Automated Cataloging of Technical Reports Via Optical Scanning

    ERIC Educational Resources Information Center

    Stiles, Helen J.; Maier, Joan M.

    1972-01-01

    A system for automated cataloging of technical reports was established during 1971. The twice-per-month output is an updated book catalog, an announcement bulletin, demand bibliographies, and an SDI notification system. Benefits include a 600 percent increase in report usage and a 10 percent decrease in catalog maintenance. (Author/NH)

  20. Far infrared supplement: Catalog of infrared observations

    NASA Astrophysics Data System (ADS)

    Gezari, Daniel Y.; Schmitz, Marion; Mead, Jaylee M.

    1982-10-01

    The development of a new generation of orbital, airborne and ground-based infrared astronomical observatory facilities, including the infrared astronomical satellite (IRAS), the cosmic background explorer (COBE), the NASA Kuiper airborne observatory, and the NASA infrared telescope facility, intensified the need for a comprehensive, machine-readable data base and catalog of current infrared astronomical observations. The Infrared Astronomical Data Base and its principal data product, this catalog, comprise a machine-readable library of infrared (1 micrometer to 1000 micrometers) astronomical observations published in the scientific literature since 1965.

  1. Master data directories and Catalog Interoperability

    NASA Technical Reports Server (NTRS)

    Thieman, J. R.

    1990-01-01

    While the 'Catalog Interoperability' (CI) project began as a NASA effort to facilitate identification, location, and access to data of interest to space and earth sciences researchers, it now has a membership encompassing numerous U.S. and international agencies as well as academic institutions. CI is creating a global network of interconnected directory, catalog, and inventory systems. Its directories contain brief summary information about data sets, and can either furnish automated links to other information systems yielding greater detail on matters of interest or indicate to whom requests for additional information can go.

  2. Safeguards instrumentation: a computer-based catalog

    SciTech Connect

    Fishbone, L.G.; Keisch, B.

    1981-08-01

    The information contained in this catalog is needed to provide a data base for safeguards studies and to help establish criteria and procedures for international safeguards for nuclear materials and facilities. The catalog primarily presents information on new safeguards equipment. It also describes entire safeguards systems for certain facilities, but it does not describe the inspection procedures. Because IAEA safeguards do not include physical security, devices for physical protection (as opposed to containment and surveillance) are not included. An attempt has been made to list capital costs, annual maintenance costs, replacement costs, and useful lifetime for the equipment. For equipment which is commercially available, representative sources have been listed whenever available.

  3. Far infrared supplement: Catalog of infrared observations

    NASA Technical Reports Server (NTRS)

    Gezari, D. Y.; Schmitz, M.; Mead, J. M.

    1982-01-01

    The development of a new generation of orbital, airborne and ground-based infrared astronomical observatory facilities, including the infrared astronomical satellite (IRAS), the cosmic background explorer (COBE), the NASA Kuiper airborne observatory, and the NASA infrared telescope facility, intensified the need for a comprehensive, machine-readable data base and catalog of current infrared astronomical observations. The Infrared Astronomical Data Base and its principal data product, this catalog, comprise a machine-readable library of infrared (1 micrometer to 1000 micrometers) astronomical observations published in the scientific literature since 1965.

  4. Report on the Second Catalog Interoperability Workshop

    NASA Technical Reports Server (NTRS)

    Thieman, James R.; James, Mary E.

    1988-01-01

    The events, resolutions, and recommendations of the Second Catalog Interoperability Workshop, held at JPL in January, 1988, are discussed. This workshop dealt with the issues of standardization and communication among directories, catalogs, and inventories in the earth and space science data management environment. The Directory Interchange Format, being constructed as a standard for the exchange of directory information among participating data systems, is discussed. Involvement in the Interoperability effort by NASA, NOAA, ISGS, and NSF is described, and plans for future interoperability considered. The NASA Master Directory prototype is presented and critiqued and options for additional capabilities debated.

  5. The Swift AGN and Cluster Survey

    NASA Astrophysics Data System (ADS)

    Danae Griffin, Rhiannon; Dai, Xinyu; Kochanek, Christopher S.; Bregman, Joel N.; Nugent, Jenna

    2016-01-01

    The Swift active galactic nucleus (AGN) and Cluster Survey (SACS) uses 125 deg^2 of Swift X-ray Telescope serendipitous fields with variable depths surrounding X-ray bursts to provide a medium depth (4 × 10^-15 erg cm^-2 s^-1) and area survey filling the gap between deep, narrow Chandra/XMM-Newton surveys and wide, shallow ROSAT surveys. Here, we present the first two papers in a series of publications for SACS. In the first paper, we introduce our method and catalog of 22,563 point sources and 442 extended sources. We examine the number counts of the AGN and galaxy cluster populations. SACS provides excellent constraints on the AGN number counts at the bright end with negligible uncertainties due to cosmic variance, and these constraints are consistent with previous measurements. The depth and areal coverage of SACS is well suited for galaxy cluster surveys outside the local universe, reaching z ˜ 1 for massive clusters. In the second paper, we use Sloan Digital Sky Survey (SDSS) DR8 data to study the 203 extended SACS sources that are located within the SDSS footprint. We search for galaxy over-densities in 3-D space using SDSS galaxies and their photometric redshifts near the Swift galaxy cluster candidates. We find 103 Swift clusters with a > 3σ over-density. The remaining targets are potentially located at higher redshifts and require deeper optical follow-up observations for confirmations as galaxy clusters. We present a series of cluster properties including the redshift, BCG magnitude, BCG-to-X-ray center offset, optical richness, X-ray luminosity and red sequences. We compare the observed redshift distribution of the sample with a theoretical model, and find that our sample is complete for z ≤ 0.3 and 80% complete for z ≤ 0.4, consistent with the survey depth of SDSS. We also match our SDSS confirmed Swift clusters to existing cluster catalogs, and find 42, 2 and 1 matches in optical, X-ray and SZ catalogs, respectively, so the majority of these

  6. Catalog Use Studies--Since the Introduction of Online Interactive Catalogs: Impact on Design for Subject Access.

    ERIC Educational Resources Information Center

    Cochrane, Pauline A.; Markey, Karen

    1983-01-01

    This review of the transition from library card catalogs to online public access catalogs (OPAC) (1981-1982) discusses methods employed by online catalog use studies (self-administered questionnaires, OPAC transaction logs, focused-group interviews, feature analysis, online search and retrieval experiments) and new directions for OPAC research…

  7. CLUSTER CHEMISTRY

    SciTech Connect

    Muetterties, Earl L.

    1980-05-01

    Metal cluster chemistry is one of the most rapidly developing areas of inorganic and organometallic chemistry. Prior to 1960 only a few metal clusters were well characterized. However, shortly after the early development of boron cluster chemistry, the field of metal cluster chemistry began to grow at a very rapid rate and a structural and a qualitative theoretical understanding of clusters came quickly. Analyzed here is the chemistry and the general significance of clusters with particular emphasis on the cluster research within my group. The importance of coordinately unsaturated, very reactive metal clusters is the major subject of discussion.

  8. VizieR Online Data Catalog: Catalog of strong MgII absorbers (Lawther+, 2012)

    NASA Astrophysics Data System (ADS)

    Lawther, D.; Paarup, T.; Schmidt, M.; Vestergaard, M.; Hjorth, J.; Malesani, D.

    2012-08-01

    Here we present a catalog of strong (rest equivalent width Wr> intervening Mg II absorbers in the SDSS Data Release 7 quasar catalog (2010AJ....139.2360S, Cat. VII/260). The intervening absorbers were found by a semi-automatic algorithm written in IDL - for details of the algorithm see section 2 of our paper. A subset of the absorbers have been visually inspected - see the MAN_OK flag in the catalog. The number of sightlines searched, tabulated by absorber redshift, i.e. g(z), is available as an ASCII table (for S/N>8 and S/N>15). All analysis in our paper is based on the SNR>8 coverage, and considers only sight-lines towards non-BAL quasars. Any questions regarding the catalog should be sent to Daniel Lawther (unclellama(at)gmail.com). (3 data files).

  9. VizieR Online Data Catalog: Binary star discoveries in the URAT1 catalog (Nicholson, 2015)

    NASA Astrophysics Data System (ADS)

    Nicholson, M. P.

    2015-05-01

    Astrometric and photometric data are presented for 9450 common proper motion binary star system using results from the first U.S. Naval Observatory Astrometric Robotic Telescope Catalog (URAT1) (1 data file).

  10. PHOTOMETRIC PROPERTIES OF THE M33 STAR CLUSTER SYSTEM

    SciTech Connect

    San Roman, Izaskun; Sarajedini, Ata; Aparicio, Antonio E-mail: ata@astro.ufl.ed

    2010-09-10

    We present a catalog of 2990 extended sources in a 1{sup 0} x 1{sup 0} area centered on M33 using the MegaCam camera on the 3.6 m Canada-France-Hawaii Telescope. The catalog includes 599 new candidate stellar clusters, 204 previously confirmed clusters, 1969 likely background galaxies, and 218 unknown extended objects. We present ugriz integrated magnitudes of the candidates and confirmed star clusters (SCs) as well as the full width at half maximum, ellipticity, and stellarity. Based on the properties of the confirmed SCs, we select a sub-sample of highly probable clusters composed of 246 objects. The integrated photometry of the complete cluster catalog reveals a wide range of colors of -0.4 < (g - r) < 1.5 and -1.0 < (r - i) < 1.0 with no obvious cluster subpopulations. Comparisons with models of simple stellar populations suggest a large range of ages some as old as {approx}10 Gyr. In addition, we find a sequence in the color-color diagrams that deviates from the expected direction of evolution. This feature could be associated with very young clusters (<10{sup 7} yr) possessing significant nebular emission. Analysis of the radial density distribution suggests that the cluster system of M33 has suffered from significant depletion possibly due to interactions with M31. We also detect a gap in the cluster distribution in the color-color diagram at (g - r) {approx_equal} 0.3 and (u - g) {approx_equal} 0.8. This gap could be interpreted as an evolutionary effect. This complete catalog provides promising targets for deep photometry and high-resolution spectroscopy to study the structure and star formation history of M33.

  11. First Version of Japan Unified High-resolution Relocated Catalog for Earthquakes by JUICE Project

    NASA Astrophysics Data System (ADS)

    Yano, T. E.; Takeda, T.; Matsubara, M.; Shiomi, K.

    2015-12-01

    The objective of Japan Unified High-resolution Relocated Catalog for Earthquakes (JUICE project) is to understand the tectonic processes, seismogenic zones, and active fault evaluations. We have completed the first version of catalog by JUICE project for the Japan Islands where the shallow (> 40 km) earthquakes up to M6.9 between years of 2001 and 2013. Events were relocated using the Double-Difference method for high-resolution earthquake location. NIED High-Sensitivity seismic observation (Hi-net) has been established in 2000 to observe micro-earthquakes in Japan. We take advantage of having such good and big data to revisit the problem in the past using these Hi-net data. We collect NIED Hi-net hypocenter catalog, Hi-net P and S arrival data, and waveforms of magnitude up to M6.5 and down to depth of 40 km from year of 2001/Jan to 2013/Dec. Then we apply our data set to the double-difference algorithm (hypoDD) by Waldhauser and Ellsworth (2000) for high-resolution hypocenter locations. It turns out to be that we relocate over 1,000,000 events for JUICE project and these events are now confined into appropriate clusters and lines. An example of applying this catalog by JUICE project is to estimate the cutoff depth where 90 % of earthquake occurred (D90) (Omuralieva et al., 2012). We now estimate the cutoff depth where 95 % of earthquake occurred (D95) by using the JUICE catalog. D95 is mainly around 15 km under the Japan Island while there the strong spatial variation throughout the Japan Island. However, some of these variations may be due to hypocenters being contaminated by intra and inner slab events and misleading a seismogenic zone for fault related events to be deeper. Since the new high-resolution catalog makes easier to distinguish hypocenters into different types, it gives shed to more detail studies. In our presentation, we will show the new JUICE catalog and its applications.

  12. VizieR Online Data Catalog: Galactic O star catalog (Maiz-apellaniz+, 2004)

    NASA Astrophysics Data System (ADS)

    Maiz-Apellaniz, J.; Walborn, N. R.; Galue, H. A.; Wei, L. H.

    2004-04-01

    We have produced a catalog of 378 Galactic O stars with accurate spectral classifications that is complete for V<8 but includes many fainter stars. The catalog provides cross-identifications with other sources; coordinates (obtained in most cases from Tycho-2 data); astrometric distances for 24 of the nearest stars; optical (Tycho-2, Johnson, and Stroemgren) and NIR photometry; group membership, runaway character, and multiplicity information; and a Web-based version with links to on-line services. (9 data files).

  13. Deriving physical parameters of M31 star clusters using the PHAT survey .

    NASA Astrophysics Data System (ADS)

    de Meulenaer, P.; Vansevičius, V.

    This work presents the derivation of the physical parameters of 1287 M31 star clusters using the catalog of the Panchromatic Hubble Andromeda Treasury survey. The star cluster parameters are derived using a large grid of star cluster models, generated with stochastically populated IMF, that are compared to the integrated broad-band WFC3+ACS photometry of the observed clusters. We derive the age, mass, and extinction of the sample of M31 star clusters with fixed solar metallicity. For clusters older than 1 Gyr, we also derive the metallicity. For globular clusters, we show that the metallicity derived is in good agreement with the metallicity previously derived using spectroscopy in literature.

  14. Earth Science Enterprise: 2002 Education Catalog.

    ERIC Educational Resources Information Center

    Schwerin, Theresa, Ed.

    The National Aeronautics and Space Administration's (NASA) Earth Science Enterprise (ESE) aims to understand Earth systems from every component including land surface, oceans, atmosphere, ice sheets, and biota from an interdisciplinary approach. This catalog provides information on ESE programs and resources for all educational audiences including…

  15. Build Your Own CD Public Access Catalog.

    ERIC Educational Resources Information Center

    Hegarty, Kevin

    1988-01-01

    Description of the development of a CD-ROM public access catalog at the Tacoma (Washington) Public Library covers: (1) costs; (2) pros and cons; (3) access time; (4) updates; (5) linking with the circulation system; (6) vendor selection; (7) compact disc interactive; and (8) digital video interactive. (MES)

  16. Managing Cataloging Statistics with a Spreadsheet.

    ERIC Educational Resources Information Center

    Shelton, Judith M.

    1995-01-01

    Presents aspects of Pullen Library's move from manual to automated management of cataloging statistics, and offers advice to libraries in similar situations. The difficulties included staff resistance, finding the right software package, and spreadsheet training; and the advantage was that the Quattro Pro program reduces complicated spreadsheets…

  17. Evaluating Patron Use of an Online Catalog.

    ERIC Educational Resources Information Center

    Rosenthal, Marilyn; Shupe, Barbara

    1995-01-01

    Describes a study conducted to investigate patron use of the online catalog at New York's Nassau Community College. Provides findings related to the number and types of patrons using information terminals, time required for searches, preferred methods for learning to use the terminal, and the most common searches. (MAB)

  18. Cataloging Sound Recordings Using Archival Methods.

    ERIC Educational Resources Information Center

    Thomas, David H.

    1990-01-01

    Discusses the processing and cataloging of archival sound recording collections. The use of "Anglo American Cataloguing Rules, 2nd edition" (AACR 2) and "Archives, Personal Papers and Manuscripts" (APPM) is explained, the MARC format for Archival and Manuscripts Control (AMC) is described, finding aids and subject indexing are…

  19. Microforms; Catalog of Publications 1972-1973.

    ERIC Educational Resources Information Center

    1972

    Among the wide variety of materials available in mocroform edition from the National Cash Register (NCR)/Microcard Editions are papal documents, transcription of the Nuremberg trials, the complete works of Swinburne, and the complete files of many magazines, including many nineteenth century magazines. This catalog indexes offerings alphabetically…

  20. Annotated Catalog of Bilingual Vocational Training Materials.

    ERIC Educational Resources Information Center

    Miranda (L.) and Associates, Bethesda, MD.

    This catalog contains annotations for 170 bilingual vocational training materials. Most of the materials are written in English, but materials written in 13 source languages and directed toward speakers of 17 target languages are provided. Annotations are provided for the following different types of documents: administrative, assessment and…

  1. Tween Consumers: Catalog Clothing Purchase Behavior.

    ERIC Educational Resources Information Center

    Simpson, Linda; Douglas, Sara; Schimmel, Julie

    1998-01-01

    Catalog shopping behavior of younger and older adolescents was compared. Results indicated that "tweens" were more concerned with style, brand name, and fashion than were older students. This supports previous findings indicating that the tween years are a time when peer pressure and "fitting in" are very important. (Author/EMK)

  2. Catalog of Programmed Instructional Material, Supplement.

    ERIC Educational Resources Information Center

    Office of Naval Research, Washington, DC. Personnel and Training Branch.

    A supplement to the NavPers 93826 Catalog of Programed Instructional Material provides a full description of instructional material programed within the Navy since April, 1967. Summaries are given of all courses, including information on the specific learners for whom the course's instruction is intended, the type of program, the projected time…

  3. Will Your Catalog Stand FTC Scrutiny?

    ERIC Educational Resources Information Center

    Bender, Louis W.

    1976-01-01

    In light of recent court rulings and Federal Trade Commission (FTC) hearings regarding unfair methods of competition and deceptive advertising, a content analysis was conducted of 20 randomly selected college catalogs from 2-year and 4-year, public and private institutions. Four types of misrepresentations were identified including institutional…

  4. Automating School Library Catalogs: A Reader.

    ERIC Educational Resources Information Center

    Murphy, Catherine, Ed.

    This collection of 23 articles compiled from school library journals address the special needs that make automation problematic for school libraries. The articles are divided into five sections: an overview of OPAC (Online Public Access Catalog) development (4 titles); evaluating OPAC systems (4 titles); implementing OPAC systems (6 titles);…

  5. LANDSAT non-US standard catalog

    NASA Technical Reports Server (NTRS)

    1976-01-01

    The Non-U.S. Standard Catalog lists imagery acquired by LANDSAT 1 and LANDSAT 2 which has been processed and input to the data files during the referenced month. Data, such as data acquired, cloud cover and image quality are given for each scene. The microfilm roll and frame on which the scene may be found is also given.

  6. Landsat non-US standard catalog

    NASA Technical Reports Server (NTRS)

    1975-01-01

    The Non-U.S. Standard Catalog lists Non-U.S. imagery acquired by Landsat 1 and 2 which was processed and input to the data files during the referenced month. Data, such as date acquired, cloud cover and image quality are given for each scene. The microfilm roll and frame on which the scene may be found are also given.

  7. The Esalen Catalog, 1993-1997.

    ERIC Educational Resources Information Center

    Esalen Inst., Big Sur, CA.

    This document consists of a compilation of the 14 issues of "The Esalen Catalog" published during the 5-year period 1993-1997. An earlier compilation (ED 347 118 in the ERIC database) covering the 30-year period 1962-1992, describes the geographic location, history, and purpose of the Esalen Institute. Esalen provides a forum in which…

  8. Cataloging the Net: Can We Do It?

    ERIC Educational Resources Information Center

    Oder, Norman

    1998-01-01

    Discusses possibilities for cataloging Internet resources and the role that the library profession can play. Topics include the Dublin Core metadata; public library projects (Michigan Electronic Library "MEL" and Librarians' Index to the Internet "LII"); academic library projects (INFOMINE, Scout Report); commercial sites…

  9. NASA Earth Science Enterprise 2000 Education Catalog.

    ERIC Educational Resources Information Center

    Schwerin, Theresa

    The National Aeronautical Space Administration's (NASA) Earth Science Enterprise (ESE) produces a wide range of products for teachers and students and supports educational activities for all grade levels in cooperation with the NASA Headquarters Education Division. This catalog presents the diverse educational programs, products, and resources…

  10. Rates inferred from the space debris catalog

    SciTech Connect

    Canavan, G.H.

    1996-08-01

    Collision and fragmentation rates are inferred from the AFSPC space debris catalog and compare with estimates from other treatments. The collision rate is evaluated without approximation. The fragmentation rate requires additional empirical assessments. The number of fragments per collision is low compared to analytic and numerical treatments, is peaked low, and falls rapidly with altitude.

  11. NASA's Earth Science Enterprise: 1998 Education Catalog

    NASA Technical Reports Server (NTRS)

    1998-01-01

    This catalog presents a reference guide to NASA Earth science education programs and products. The topics include: 1) Student Support (Elementary and Secondary, Undergraduate and Graduate, Postgraduate, and Postdoctorate); 2) Teacher/Faculty Preparation and Enhancement; 3) Systemic Change; 4) Curriculum Support; and 5) Resources.

  12. CD-ROM Catalog Production Products.

    ERIC Educational Resources Information Center

    Bills, Linda; Helgerson, Linda

    1989-01-01

    Compares database characteristics, access, display, editing, new records, hard copy products, hardware, and price of CD-ROM catalog production products from seven vendors: Gaylord Information Systems; General Research Corporation; The Library Corporation; OCLC; Solinet; Utlas; and the Western Library Network. (MES)

  13. OSHA Training Institute Catalog of Courses.

    ERIC Educational Resources Information Center

    May, Fredric C., Comp.

    The Occupational Safety and Health Administration Training Institute's series of courses for 1978 is presented in this catalog. Most courses are designed for occupational safety or health professionals who are federal or state employees; two are available for personnel from the private sector. The schedule includes courses required for newly hired…

  14. Catalog of Programming 1993-94.

    ERIC Educational Resources Information Center

    Native American Public Broadcasting Consortium, Lincoln, NE.

    This catalog indexes and describes over 175 Native American programs produced for public television and available on video to public television stations, schools, libraries, and educational users. Introductory pages describe the development of the Native American Public Broadcasting Consortium and present brief biographies of nine Native American…

  15. Catalog of Audiovisual Materials Related to Rehabilitation.

    ERIC Educational Resources Information Center

    Mann, Joe, Ed.; Henderson, Jim, Ed.

    An annotated listing of a variety of audiovisual formats on content related to the social-rehabilitation process is provided. The materials in the listing were selected from a collection of over 200 audiovisual catalogs. The major portion of the materials has not been screened. The materials are classified alphabetically by the following subject…

  16. NASA's Earth Science Enterprise: 1998 Education Catalog

    NASA Technical Reports Server (NTRS)

    1998-01-01

    The goals of the Earth Science Enterprise (ESE) are to expand the scientific knowledge of the Earth system; to widely disseminate the results of the expanded knowledge; and to enable the productive use of this knowledge. This catalog provides information about the Earth Science education programs and the resources available for elementary through university levels.

  17. Defense Management Education and Training Catalog.

    ERIC Educational Resources Information Center

    Office of the Assistant Secretary of Defense for Manpower and Reserve Affairs (DOD), Washington, DC.

    This catalog provides information on a wide variety of courses, programs, and school made available by Department of Defense organizations. The program consists of eighteen primarily service-operated schools offering joint training in management covering a wide variety of subjects including automatic data processing, production management,…

  18. VizieR Online Data Catalog: Skymap Star Catalog - Version 3.7 (Slater+ 1992)

    NASA Astrophysics Data System (ADS)

    Slater, M.; Hashmall, J.

    1995-09-01

    The original version has been improved and updated with corrections several times. Version 3.7 incorporates known errors documented previously in SKYMAP Error Reports. Magnitude errors discovered in SKYMAP Version 3.6 were corrected. Other minor catalog corrections, including the deletion of five duplicate entries and the addition of two stars, were also performed. The original catalog was compiled by D. M. Gottlieb of Computer Sciences Corporation (CSC) under contract to NASA. The compilation and statistics of the catalog are described by Gottlieb (1978), while the source referenced above describes in detail the contents of the current version and the derivation of values not available observationally. * IMPORTANT NOTE: THIS CATALOG WAS NOT COMPILED TO PROVIDE THE MOST ACCURATE AND RELIABLE DATA AT THE ASTRONOMICAL RESEARCH LEVEL. THE DERIVATIONS OF TWO-DIMENSIONAL MK TYPES FROM ONE-DIMENSIONAL DATA, UBV VALUES FROM PHOTOVISUAL AND PHOTOGRAPHIC MAGNITUDES, AND STELLAR DISTANCES FROM MAGNITUDES AND SPECTRAL TYPES ARE EXTREMELY UNCERTAIN, SO THESE DATA SHOULD NOT BE USED WITHOUT CAREFUL SCRUTINY. THE VARIOUS FLAGS ASSOCIATED WITH CATALOG DATA SHOULD BE RETAINED WITH THE DATA AT ALL TIMES OR GROSS MISINTERPRETATIONS MAY RESULT. USERS OF THIS CATALOG SHOULD KEEP THESE FACTS IN MIND CONSTANTLY. (1 data file).

  19. Segmentation of fault networks determined from spatial clustering of earthquakes

    NASA Astrophysics Data System (ADS)

    Ouillon, G.; Sornette, D.

    2011-02-01

    We present a new method of data clustering applied to earthquake catalogs, with the goal of reconstructing the seismically active part of fault networks. We first use an original method to separate clustered events from uncorrelated seismicity using the distribution of volumes of tetrahedra defined by closest neighbor events in the original and randomized seismic catalogs. The spatial disorder of the complex geometry of fault networks is then taken into account by defining faults as probabilistic anisotropic kernels. The structure of those kernels is motivated by properties of discontinuous tectonic deformation and by previous empirical observations of the geometry of faults and of earthquake clusters at many spatial and temporal scales. Combining this a priori knowledge with information theoretical arguments, we propose the Gaussian mixture approach implemented in an expectation maximization (EM) procedure. A cross-validation scheme is then used that allows the determination of the number of kernels which provides an optimal data clustering of the catalog. This three-step approach is applied to a high-quality catalog of relocated seismicity following the 1986 Mount Lewis (Ml = 5.7) event in California. It reveals that events cluster along planar patches of about 2 km2, i.e., comparable to the size of the main event. The finite thickness of those clusters (about 290 m) suggests that events do not occur on well-defined and smooth Euclidean fault core surfaces but rather that there exist a deforming area and a damage zone surrounding faults which may be seismically active at depth. Finally, we propose a connection between our methodology and multiscale spatial analysis, based on the derivation of a spatial fractal dimension of about 1.8 for the set of hypocenters in the Mount Lewis area, consistent with recent observations on relocated catalogs.

  20. THE CHANDRA VARIABLE GUIDE STAR CATALOG

    SciTech Connect

    Nichols, Joy S.; Lauer, Jennifer L.; Morgan, Douglas L.; Sundheim, Beth A.; Henden, Arne A.; Huenemoerder, David P.; Martin, Eric

    2010-06-15

    Variable stars have been identified among the optical-wavelength light curves of guide stars used for pointing control of the Chandra X-ray Observatory. We present a catalog of these variable stars along with their light curves and ancillary data. Variability was detected to a lower limit of 0.02 mag amplitude in the 4000-10000 A range using the photometrically stable Aspect Camera on board the Chandra spacecraft. The Chandra Variable Guide Star Catalog (VGUIDE) contains 827 stars, of which 586 are classified as definitely variable and 241 are identified as possibly variable. Of the 586 definite variable stars, we believe 319 are new variable star identifications. Types of variables in the catalog include eclipsing binaries, pulsating stars, and rotating stars. The variability was detected during the course of normal verification of each Chandra pointing and results from analysis of over 75,000 guide star light curves from the Chandra mission. The VGUIDE catalog represents data from only about 9 years of the Chandra mission. Future releases of VGUIDE will include newly identified variable guide stars as the mission proceeds. An important advantage of the use of space data to identify and analyze variable stars is the relatively long observations that are available. The Chandra orbit allows for observations up to 2 days in length. Also, guide stars were often used multiple times for Chandra observations, so many of the stars in the VGUIDE catalog have multiple light curves available from various times in the mission. The catalog is presented as both online data associated with this paper and as a public Web interface. Light curves with data at the instrumental time resolution of about 2 s, overplotted with the data binned at 1 ks, can be viewed on the public Web interface and downloaded for further analysis. VGUIDE is a unique project using data collected during the mission that would otherwise be ignored. The stars available for use as Chandra guide stars are

  1. Earth Resources Technology Satellite: US standard catalog No. U-12

    NASA Technical Reports Server (NTRS)

    1973-01-01

    To provide dissemination of information regarding the availability of Earth Resources Technology Satellite (ERTS) imagery, a U.S. Standard Catalog is published on a monthly schedule. The catalogs identify imagery which has been processed and input to the data files during the preceding month. The U.S. Standard Catalog includes imagery covering the Continental United States, Alaska, and Hawaii. As a supplement to these catalogs, an inventory of ERTS imagery on 16 millimeter microfilm is available. The catalogs consist of four parts: (1) annotated maps which graphically depict the geographic areas covered by the imagery listed in the current catalog, (2) a computer-generated listing organized by observation identification number (D) with pertinent information on each image, (3) a computer listing of observations organized by longitude and latitude, and (4) observations which have had changes made in their catalog information since the original entry in the data base.

  2. New Catalog of Resources Enables Paleogeosciences Research

    NASA Astrophysics Data System (ADS)

    Lingo, R. C.; Horlick, K. A.; Anderson, D. M.

    2014-12-01

    The 21st century promises a new era for scientists of all disciplines, the age where cyber infrastructure enables research and education and fuels discovery. EarthCube is a working community of over 2,500 scientists and students of many Earth Science disciplines who are looking to build bridges between disciplines. The EarthCube initiative will create a digital infrastructure that connects databases, software, and repositories. A catalog of resources (databases, software, repositories) has been produced by the Research Coordination Network for Paleogeosciences to improve the discoverability of resources. The Catalog is currently made available within the larger-scope CINERGI geosciences portal (http://hydro10.sdsc.edu/geoportal/catalog/main/home.page). Other distribution points and web services are planned, using linked data, content services for the web, and XML descriptions that can be harvested using metadata protocols. The databases provide searchable interfaces to find data sets that would otherwise remain dark data, hidden in drawers and on personal computers. The software will be described in catalog entries so just one click will lead users to methods and analytical tools that many geoscientists were unaware of. The repositories listed in the Paleogeosciences Catalog contain physical samples found all across the globe, from natural history museums to the basements of university buildings. EarthCube has over 250 databases, 300 software systems, and 200 repositories which will grow in the coming year. When completed, geoscientists across the world will be connected into a productive workflow for managing, sharing, and exploring geoscience data and information that expedites collaboration and innovation within the paleogeosciences, potentially bringing about new interdisciplinary discoveries.

  3. THE SIMPLE SURVEY: OBSERVATIONS, REDUCTION, AND CATALOG

    SciTech Connect

    Damen, M.; Franx, M.; Taylor, E. N.; Labbe, I.; Van Dokkum, P. G.; Muzzin, A.; Brandt, W. N.; Dickinson, M.; Gawiser, E.; Illingworth, G. D.; Marchesini, D.; Papovich, C.; Rix, H.-W.

    2011-01-20

    We present the Spitzer IRAC/MUSYC Public Legacy Survey in the Extended CDF-South (SIMPLE), which consists of deep IRAC observations covering the {approx}1600 arcmin{sup 2} area surrounding GOODS-S. The limiting magnitudes of the SIMPLE IRAC mosaics typically are 23.8, 23.6, 21.9, and 21.7, at 3.6 {mu}m, 4.5 {mu}m, 5.8 {mu}m, and 8.0 {mu}m, respectively (5{sigma} total point source magnitudes in AB). The SIMPLE IRAC images are combined with the 10' x 15' GOODS IRAC mosaics in the center. We give detailed descriptions of the observations, data reduction, and properties of the final images, as well as the detection and photometry methods used to build a catalog. Using published optical and near-infrared data from the Multiwavelength Survey by Yale-Chile (MUSYC), we construct an IRAC-selected catalog, containing photometry in UBVRIz'JHK, [3.6 {mu}m], [4.5 {mu}m], [5.8 {mu}m], and [8.0 {mu}m]. The catalog contains 43,782 sources with S/N >5 at 3.6 {mu}m, 19,993 of which have 13-band photometry. We compare this catalog to the publicly available MUSYC and FIREWORKS catalogs and discuss the differences. Using a high signal-to-noise sub-sample of 3391 sources with ([3.6] + [4.5])/2 < 21.2, we investigate the star formation rate history of massive galaxies out to z {approx} 1.8. We find that at z {approx} 1.8 at least 30% {+-} 7% of the most massive galaxies (M{sub *} >10{sup 11} M{sub sun}) are passively evolving, in agreement with earlier results from surveys covering less area.

  4. The Chandra Source Catalog: User Interface

    NASA Astrophysics Data System (ADS)

    Bonaventura, Nina; Evans, I. N.; Harbo, P. N.; Rots, A. H.; Tibbetts, M. S.; Van Stone, D. W.; Zografou, P.; Anderson, C. S.; Chen, J. C.; Davis, J. E.; Doe, S. M.; Evans, J. D.; Fabbiano, G.; Galle, E.; Gibbs, D. G.; Glotfelty, K. J.; Grier, J. D.; Hain, R.; Hall, D. M.; He, X.; Houck, J. C.; Karovska, M.; Lauer, J.; McCollough, M. L.; McDowell, J. C.; Miller, J. B.; Mitschang, A. W.; Morgan, D. L.; Nichols, J. S.; Nowak, M. A.; Plummer, D. A.; Primini, F. A.; Refsdal, B. L.; Siemiginowska, A. L.; Sundheim, B. A.; Winkelman, S. L.

    2009-01-01

    The Chandra Source Catalog (CSC) is the definitive catalog of all X-ray sources detected by Chandra. The CSC is presented to the user in two tables: the Master Chandra Source Table and the Table of Individual Source Observations. Each distinct X-ray source identified in the CSC is represented by a single master source entry and one or more individual source entries. If a source is unaffected by confusion and pile-up in multiple observations, the individual source observations are merged to produce a master source. In each table, a row represents a source, and each column a quantity that is officially part of the catalog. The CSC contains positions and multi-band fluxes for the sources, as well as derived spatial, spectral, and temporal source properties. The CSC also includes associated source region and full-field data products for each source, including images, photon event lists, light curves, and spectra. The master source properties represent the best estimates of the properties of a source, and are presented in the following categories: Position and Position Errors, Source Flags, Source Extent and Errors, Source Fluxes, Source Significance, Spectral Properties, and Source Variability. The CSC Data Access GUI provides direct access to the source properties and data products contained in the catalog. The user may query the catalog database via a web-style search or an SQL command-line query. Each query returns a table of source properties, along with the option to browse and download associated data products. The GUI is designed to run in a web browser with Java version 1.5 or higher, and may be accessed via a link on the CSC website homepage (http://cxc.harvard.edu/csc/). As an alternative to the GUI, the contents of the CSC may be accessed directly through a URL, using the command-line tool, cURL. Support: NASA contract NAS8-03060 (CXC).

  5. K2: A New Method for the Detection of Galaxy Clusters Based on Canada-France-Hawaii Telescope Legacy Survey Multicolor Images

    NASA Astrophysics Data System (ADS)

    Thanjavur, Karun; Willis, Jon; Crampton, David

    2009-11-01

    We have developed a new method, K2, optimized for the detection of galaxy clusters in multicolor images. Based on the Red Sequence approach, K2 detects clusters using simultaneous enhancements in both colors and position. The detection significance is robustly determined through extensive Monte Carlo simulations and through comparison with available cluster catalogs based on two different optical methods, and also on X-ray data. K2 also provides quantitative estimates of the candidate clusters' richness and photometric redshifts. Initially, K2 was applied to the two color (gri) 161 deg2 images of the Canada-France-Hawaii Telescope Legacy Survey Wide (CFHTLS-W) data. Our simulations show that the false detection rate for these data, at our selected threshold, is only ~1%, and that the cluster catalogs are ~80% complete up to a redshift of z = 0.6 for Fornax-like and richer clusters and to z ~ 0.3 for poorer clusters. Based on the g-, r-, and i-band photometric catalogs of the Terapix T05 release, 35 clusters/deg2 are detected, with 1-2 Fornax-like or richer clusters every 2 deg2. Catalogs containing data for 6144 galaxy clusters have been prepared, of which 239 are rich clusters. These clusters, especially the latter, are being searched for gravitational lenses—one of our chief motivations for cluster detection in CFHTLS. The K2 method can be easily extended to use additional color information and thus improve overall cluster detection to higher redshifts. The complete set of K2 cluster catalogs, along with the supplementary catalogs for the member galaxies, are available on request from the authors.

  6. K2: A NEW METHOD FOR THE DETECTION OF GALAXY CLUSTERS BASED ON CANADA-FRANCE-HAWAII TELESCOPE LEGACY SURVEY MULTICOLOR IMAGES

    SciTech Connect

    Thanjavur, Karun; Willis, Jon; Crampton, David

    2009-11-20

    We have developed a new method, K2, optimized for the detection of galaxy clusters in multicolor images. Based on the Red Sequence approach, K2 detects clusters using simultaneous enhancements in both colors and position. The detection significance is robustly determined through extensive Monte Carlo simulations and through comparison with available cluster catalogs based on two different optical methods, and also on X-ray data. K2 also provides quantitative estimates of the candidate clusters' richness and photometric redshifts. Initially, K2 was applied to the two color (gri) 161 deg{sup 2} images of the Canada-France-Hawaii Telescope Legacy Survey Wide (CFHTLS-W) data. Our simulations show that the false detection rate for these data, at our selected threshold, is only approx1%, and that the cluster catalogs are approx80% complete up to a redshift of z = 0.6 for Fornax-like and richer clusters and to z approx 0.3 for poorer clusters. Based on the g-, r-, and i-band photometric catalogs of the Terapix T05 release, 35 clusters/deg{sup 2} are detected, with 1-2 Fornax-like or richer clusters every 2 deg{sup 2}. Catalogs containing data for 6144 galaxy clusters have been prepared, of which 239 are rich clusters. These clusters, especially the latter, are being searched for gravitational lenses-one of our chief motivations for cluster detection in CFHTLS. The K2 method can be easily extended to use additional color information and thus improve overall cluster detection to higher redshifts. The complete set of K2 cluster catalogs, along with the supplementary catalogs for the member galaxies, are available on request from the authors.

  7. OGLE Collection of Star Clusters. New Objects in the Outskirts of the Large Magellanic Cloud

    NASA Astrophysics Data System (ADS)

    Sitek, M.; Szymański, M. K.; Skowron, D. M.; Udalski, A.; Kostrzewa-Rutkowska, Z.; Skowron, J.; Karczmarek, P.; Cieślar, M.; Wyrzykowski, Ł.; Kozłowski, S.; Pietrukowicz, P.; Soszyński, I.; Mróz, P.; Pawlak, M.; Poleski, R.; Ulaczyk, K.

    2016-09-01

    The Magellanic System (MS), consisting of the Large Magellanic Cloud (LMC), the Small Magellanic Cloud (SMC) and the Magellanic Bridge (MBR), contains diverse sample of star clusters. Their spatial distribution, ages and chemical abundances may provide important information about the history of formation of the whole System. We use deep photometric maps derived from the images collected during the fourth phase of the Optical Gravitational Lensing Experiment (OGLE-IV) to construct the most complete catalog of star clusters in the Large Magellanic Cloud using the homogeneous photometric data. In this paper we present the collection of star clusters found in the area of about 225 square degrees in the outer regions of the LMC. Our sample contains 679 visually identified star cluster candidates, 226 of which were not listed in any of the previously published catalogs. The new clusters are mainly young small open clusters or clusters similar to associations.

  8. The Andromeda Project: Final Results of Citizen Science Cluster Identification

    NASA Astrophysics Data System (ADS)

    Seth, Anil; Johnson, L. C.; Wallace, M.; Dalcanton, J.; Kapadia, A.; Lintott, C.; Simpson, R.; Skillman, E. D.; PHAT Team; Andromeda Project Team

    2014-01-01

    The Panchromatic Hubble Andromeda Treasury (PHAT) survey has completed data collection, having taken over 30 billion pixels of imaging data of the Andromeda galaxy over four years using the Hubble Space Telescope. These data contain the largest sample of star clusters observable in any galaxy, including our own Milky Way. The Andromeda Project is a citizen science project that recruited over 10,000 volunteers to identify thousands of star clusters in the PHAT imaging. We present results culminating from two rounds of cluster searching and the properties of the resulting sample. We discuss catalog completeness results derived from synthetic cluster data. This cluster sample represents a significant advance in our ability to study star and cluster formation on galaxy wide scales. We are using the resulting cluster sample to provide the best available constraints on the high-mass initial mass function and the fraction of star formation that results in bound star clusters.

  9. Multiple object redshift determinations in clusters of galaxies using OCTOPUS

    NASA Astrophysics Data System (ADS)

    Mazure, A.; Proust, D.; Sodre, L.; Lund, G.; Capelato, H.

    1987-03-01

    The ESO multiobject facility, Octopus, was used to observe a sample of galaxy clusters such as SC2008-565 in an attempt to collect a large set of individual radial velocities. A dispersion of 114 A/mm was used, providing spectral coverage from 3800 to 5180 A. Octopus was found to be a well-adapted instrument for the rapid and simultaneous determination of redshifts in cataloged galaxy clusters.

  10. Multiple object redshift determinations in clusters of galaxies using OCTOPUS

    NASA Astrophysics Data System (ADS)

    Mazure, A.; Proust, D.; Sodre, L.; Capelato, H. V.; Lund, G.

    1988-04-01

    The ESO multiobject facility, Octopus, was used to observe a sample of galaxy clusters such as SC2008-565 in an attempt to collect a large set of individual radial velocities. A dispersion of 114 A/mm was used, providing spectral coverage from 3800 to 5180 A. Octopus was found to be a well-adapted instrument for the rapid and simultaneous determination of redshifts in cataloged galaxy clusters.

  11. VizieR Online Data Catalog: Brightest cluster galaxies in Abell clusters (Lauer+, 2014)

    NASA Astrophysics Data System (ADS)

    Lauer, T. R.; Postman, M.; Strauss, M. A.; Graves, G. J.; Chisari, N. E.

    2017-01-01

    Images of the BCGs were obtained in 13 runs between 1989 and 1995 using CCD cameras on the Kitt Peak National Observatory (KPNO) 4m, KPNO 2.1m, and Cerro Tololo Inter-American Observatory (CTIO) 1.5m telescopes.We obtained long-slit spectra of all BCG candidates in the sample over the course of 14 observing runs, spanning a 5yr timeframe, at NOAO's CTIO and KPNO. The CTIO observations were done primarily using the Blanco 4m Telescope, except for the first two runs, which used the 1.5m telescope. All KPNO runs were done using the Goldcam spectrograph on the 2.1m telescope. (5 data files).

  12. VizieR Online Data Catalog: Astrographic Catalog Reference Stars (ACRS) (Corbin+ 1991)

    NASA Astrophysics Data System (ADS)

    Corbin, T. E.; Urban, S. E.; Warren, W. H., Jr.

    1995-11-01

    The ACRS is an all-sky catalog of positions and proper motions that is based on the AGK3 in the north and on the newly completed second Cape Photographic Catalogue (CPC2, de Vegt et al. 1989) in the south. The astrometric data are on the system of the International Reference Stars (IRS, catalog ), compiled on B1950.0 FK4 and then transformed to J2000.0 FK5. The ACRS contains 320,111 stars, the mean positions for which were derived from a total of 1,643,783 individual input positions. The catalog is divided into two parts. Part 1 contains stars having better observational histories and, therefore, more reliable positions and proper motions, while the stars in Part 2 have poor histories and consist mostly of objects for which only two catalog positions in one or both coordinates were available for computing proper motions. For Part 1, which consists of 78 percent of the catalog, the mean errors of the proper motions in right ascension and declination are 0.47 and 0.46 seconds of arc/century (4.7 and 4.6 mas/yr), respectively. It is intended that, as more observations are accumulated for stars in Part 2, they will be migrated to Part 1. The catalog was compiled at the U.S. Naval Observatory, Washington, D.C., for purposes of performing new reductions of the Astrographic Catalogue plates. Additional details about the construction of the ACRS may be found in Corbin and Urban (1989). The data included are catalog part, ACRS number, equatorial coordinates (equinox, equator, epoch B1950.0 and J2000.0), proper motions (B1950.0 and J2000.0), original epochs, weights for right ascension and declination, and reference data such as DM numbers (BD, CD, CPD), AGK3 and CPC2 designations, and an IAU recommended ACRS identifier (based on coordinates). (2 data files).

  13. VizieR Online Data Catalog: SKY2000 Master Catalog, Version 5 (Myers+ 2006)

    NASA Astrophysics Data System (ADS)

    Myers, J. R.; Sande, C. B.; Miller, A. C.; Warren, W. H., Jr.; Tracewell, D. A.

    2015-02-01

    The SKYMAP Star Catalog System consists of a Master Catalog stellar database and a collection of utility software designed to create and maintain the database and to generate derivative mission star catalogs (run catalogs). It contains an extensive compilation of information on almost 300000 stars brighter than 8.0mag. The original SKYMAP Master Catalog was generated in the early 1970's. Incremental updates and corrections were made over the following years but the first complete revision of the source data occurred with Version 4.0. This revision also produced a unique, consolidated source of astrometric information which can be used by the astronomical community. The derived quantities were removed and wideband and photometric data in the R (red) and I (infrared) systems were added. Version 4 of the SKY2000 Master Catalog was completed in April 2002; it marks the global replacement of the variability identifier and variability data fields. More details can be found in the description file sky2kv4.pdf. The SKY2000 Version 5 Revision 4 Master Catalog differs from Revision 3 in that MK and HD spectral types have been added from the Catalogue of Stellar Spectral Classifications (B. A. Skiff of Lowell Observatory, 2005), which has been assigned source code 50 in this process. 9622 entries now have MK types from this source, while 3976 entries have HD types from this source. SKY2000 V5 R4 also differs globally from preceding MC versions in that the Galactic coordinate computations performed by UPDATE have been increased in accuracy, so that differences from the same quantities from other sources are now typically in the last decimal places carried in the MC. This version supersedes the previous versions 1(V/95), 2(V/102), 3(V/105) and 4(V/109). (6 data files).

  14. The High-mass Truncation of the Star Cluster Mass Function: Limits on Massive Cluster Formation

    NASA Astrophysics Data System (ADS)

    Johnson, L. C.; PHAT Team

    2017-01-01

    Long-lived star clusters serve as useful tracers of star formation, and massive clusters in particular are often associated with vigorous star formation activity. We examine how massive cluster formation varies as a function of star formation surface density (ΣSFR) by comparing cluster populations from galaxies that span a wide range of characteristic ΣSFR values. The Panchromatic Hubble Andromeda Treasury (PHAT) survey yielded an unparalleled census of young star clusters in M31 and allows us to examine massive cluster formation in a low intensity star formation environment. We measure the cluster mass function for a sample of 840 young star clusters with ages between 10-300 Myr. The data show clear evidence of a high-mass truncation: only 15 clusters more massive than 104 M⊙ are observed, compared to ~100 expected for a canonical M-2 power-law mass function with the same total number of clusters above the catalog completeness limit. Adopting a Schechter function parameterization, we fit a characteristic truncation mass (Mc) of 8.5×103 M⊙ — the lowest truncation mass ever reported. When combined with previous mass function results, we find that the cluster mass function truncation correlates strongly with the star formation rate surface density, where Mc ∝ ΣSFR1.3. We also find evidence that suggests the observed Mc-ΣSFR relation also holds for globular clusters, linking the two populations via a common formation pathway.

  15. Towards a Comprehensive Catalog of Volcanic Seismicity

    NASA Astrophysics Data System (ADS)

    Thompson, G.

    2014-12-01

    Catalogs of earthquakes located using differential travel-time techniques are a core product of volcano observatories, and while vital, they represent an incomplete perspective of volcanic seismicity. Many (often most) earthquakes are too small to locate accurately, and are omitted from available catalogs. Low frequency events, tremor and signals related to rockfalls, pyroclastic flows and lahars are not systematically catalogued, and yet from a hazard management perspective are exceedingly important. Because STA/LTA detection schemes break down in the presence of high amplitude tremor, swarms or dome collapses, catalogs may suggest low seismicity when seismicity peaks. We propose to develop a workflow and underlying software toolbox that can be applied to near-real-time and offline waveform data to produce comprehensive catalogs of volcanic seismicity. Existing tools to detect and locate phaseless signals will be adapted to fit within this framework. For this proof of concept the toolbox will be developed in MATLAB, extending the existing GISMO toolbox (an object-oriented MATLAB toolbox for seismic data analysis). Existing database schemas such as the CSS 3.0 will need to be extended to describe this wider range of volcano-seismic signals. WOVOdat may already incorporate many of the additional tables needed. Thus our framework may act as an interface between volcano observatories (or campaign-style research projects) and WOVOdat. We aim to take the further step of reducing volcano-seismic catalogs to sets of continuous metrics that are useful for recognizing data trends, and for feeding alarm systems and forecasting techniques. Previous experience has shown that frequency index, peak frequency, mean frequency, mean event rate, median event rate, and cumulative magnitude (or energy) are potentially useful metrics to generate for all catalogs at a 1-minute sample rate (directly comparable with RSAM and similar metrics derived from continuous data). Our framework

  16. VizieR Online Data Catalog: URAT Parallax Catalog (UPC) (Finch+, 2016)

    NASA Astrophysics Data System (ADS)

    Finch, C. T.; Zacharias, N.

    2016-04-01

    The URAT Parallax Catalog (UPC) consists of 112177 parallaxes. The catalog utilizes all Northern Hemisphere epoch data from the United States Naval Observatory (USNO) Robotic Astrometric Telescope (URAT). This data includes all individual exposures from April 2012 to June 2015 giving a larger epoch baseline for determining parallaxes over the 2-year span of the First USNO Robotic Astrometric Telescope Catalog (URAT1) (Zacharias et al., 2015, Cat. I/329) published data. The URAT parallax pipeline is custom code that utilizes routines from (Jao, C.-W., 2004, PhD thesis Georgia Stat), the JPL DE405 ephemeris and Green's parallax factor (Green, R.M., 1985, Spherical Astronomy) for determining parallaxes from a weighted least-squares reduction. The relative parallaxes have been corrected to absolute by using the distance color relation described in (Finch et. al, 2014, Cat. J/AJ/148/119) to determine a mean distance of all UCAC4 reference stars (R=8-16 mag) used in the astrometric reductions. Presented here are all significant parallaxes from the URAT Northern Hemisphere epoch data comprising of 2 groups: a) URAT parallax results for stars with prior published parallax, and b) first time trigonometric parallaxes as obtained from URAT data of stars without prior published parallax. Note, more stringent selection criteria have been applied to the second group than the first in order to keep the rate of false detections low. For specific information about the astrometric reductions please see 'The First U.S. Naval Observatory Robotic Astrometric Telescope Catalog' published paper (Zacharias et al., 2015AJ....150..101Z, Cat. I/329). For complete details regarding the parallax pipeline please see 'Parallax Results From URAT Epoch Data' (Finch and Zacharias, 2016, AJ, in press). This catalog gives all positions on the ICRS at Epoch J2014.0; it covers the magnitude range 6.56 to 16.93 in the URAT band-pass, with an average parallax precision of 4.3mas for stars having no known

  17. A Cosmic Void Catalog of SDSS DR12 BOSS Galaxies

    NASA Astrophysics Data System (ADS)

    Mao, Qingqing; Berlind, Andreas A.; Scherrer, Robert J.; Neyrinck, Mark C.; Scoccimarro, Román; Tinker, Jeremy L.; McBride, Cameron K.; Schneider, Donald P.; Pan, Kaike; Bizyaev, Dmitry; Malanushenko, Elena; Malanushenko, Viktor

    2017-02-01

    We present a cosmic void catalog using the large-scale structure galaxy catalog from the Baryon Oscillation Spectroscopic Survey (BOSS). This galaxy catalog is part of the Sloan Digital Sky Survey (SDSS) Data Release 12 and is the final catalog of SDSS-III. We take into account the survey boundaries, masks, and angular and radial selection functions, and apply the ZOBOV void finding algorithm to the Galaxy catalog. We identify a total of 10,643 voids. After making quality cuts to ensure that the voids represent real underdense regions, we obtain 1,228 voids with effective radii spanning the range 20–100 {h}-1 {Mpc} and with central densities that are, on average, 30% of the mean sample density. We release versions of the catalogs both with and without quality cuts. We discuss the basic statistics of voids, such as their size and redshift distributions, and measure the radial density profile of the voids via a stacking technique. In addition, we construct mock void catalogs from 1000 mock galaxy catalogs, and find that the properties of BOSS voids are in good agreement with those in the mock catalogs. We compare the stellar mass distribution of galaxies living inside and outside of the voids, and find no large difference. These BOSS and mock void catalogs are useful for a number of cosmological and galaxy environment studies.

  18. A Use Study of the Card Catalogs in the University of Illinois Music Library.

    ERIC Educational Resources Information Center

    Drone, Jeanette M.

    1984-01-01

    A multifaceted card catalog use study was conducted at University of Illinois Music Library to determine hourly rate of use at sound recording and book/music catalogs; time spent at catalogs; who uses catalogs and why; difficulties users encounter; success rate of users' searches; recommendations for designing online catalog. (16 references)…

  19. VizieR Online Data Catalog: Catalog of Earth-Like Exoplanet Survey Targets (Chandler+, 2016)

    NASA Astrophysics Data System (ADS)

    Chandler, C. O.; McDonald, I.; Kane, S. R.

    2016-07-01

    We present the Catalog of Earth-Like Exoplanet Survey Targets (CELESTA), a database of habitable zones around 37000 nearby stars. The first step in creating CELESTA was assembling the input data. The Revised Hipparcos Catalog (van Leeuwen 2007, Cat. I/311) is a stellar catalog based on the original Hipparcos mission (Perryman et al. 1997, Cat. I/239) data set. Hipparcos, launched in 1989, recorded with great precision the parallax of nearby stars, ultimately leading to a database of 118218 stars. McDonald et al. 2012 (cat. J/MNRAS/427/343) calculated effective temperatures and luminosities for the Hipparcos stars. The next step was selecting appropriate stars for the construction of CELESTA. The Stellar Parameter Catalog of 103663 stars included many stars that were not suitable for our purposes, especially stars off the Main-Sequence (MS) branch, e.g., giants. Please refer to Section 3.2 in the paper for additional details about the star selection. The final CELESTA catalog contains 37354 stars (see Table2), each with a set of associated attributes, e.g., estimated mass, measured distance. The complete database can also be found online at a dedicated host (http://www.celesta.info/). (2 data files).

  20. VizieR Online Data Catalog: Class I methanol maser catalog (Bayandina+, 2012)

    NASA Astrophysics Data System (ADS)

    Bayandina, O. S.; Val'Tts, I. E.; Larionov, G. M.

    2012-11-01

    We have revised the Astro Space Center catalog of Class I methanol masers detected in starforming regions (MMI/SFR), mainly at 44GHz, and created a new electronic version of the catalog. Currently, the catalog contains 206 objects, selected from publications through 2011 inclusive. The data from the survey of Chen et al. (2011, Cat. J/ApJS/196/9), performed specifically for objects EGO, which form a new specific catalog, are not included. The MMI/SFR objects were identified with emission and absorption objects in the near IR, detected during the MSX and Spitzer space missions. Seventy-one percent of Class I methanol masers that emit at 44GHz and fall within the Galactic longitude range surveyed by Spitzer (GLIMPSE) are identified with Spitzer Dark Clouds (SDCs), and 42% with Extended Green Objects (EGOs). It is possible that Class I methanol masers arise in isolated, self-gravitating clumps, such as SDCs, at certain stages of their evolution. A sample of SDCs is proposed as a new target list for Class I methanol maser searches. A detailed statistical analysis was carried out, taking into account the characteristics of the regions of MMI/SFR formation presented in the catalog. (1 data file).

  1. VizieR Online Data Catalog: ubvy photometry of NGC2419 (Frank+, 2015)

    NASA Astrophysics Data System (ADS)

    Frank, M. J.; Koch, A.; Feltzing, S.; Kacharov, N.; Wilkinson, M. I.; Irwin, M.

    2015-07-01

    Imaging of NGC 2419 in the intermediate-band Stromgren filters u, b, v and y was obtained in February 2012 using the Wide Field Camera (WFC) at the 2.5m Isaac Newton Telescope (INT) at the Roque de los Muchachos Observatory, La Palma, Spain. The resulting photometric catalog containing 1197 detections in the unvignetted field of the camera, passing basic quality cuts (magnitude uncertainty, sharpness, {chi}) in all four filters is made available here. It covers NGC 2419 out to about 25 arcmin, several times beyond its tidal radius, but is incomplete in the cluster centre due to crowding. (1 data file).

  2. Catalog of the Neotropical Trichoptera (Caddisflies)

    PubMed Central

    Holzenthal, Ralph W.; Calor, Adolfo R.

    2017-01-01

    Abstract The Neotropical caddisfly (Trichoptera) fauna is cataloged from a review of over 1,000 literature citations through 2015 (partial 2016) to include 3,262 currently recognized, valid species-group names in 25 families and 155 extant genera. Fourteen subspecies are included in the total as well as 35 fossil species and 1 fossil genus. The region covered includes all of Mexico, Central America, the Caribbean, and South America. Genus-group and species-group synonyms are listed. For each nominal species, information on the type locality, type depository, sex of type, distribution by country, and other pertinent taxonomic or biological information is included. Summary information on taxonomy, phylogeny, distribution, immature stages, and biology are provided for each family and genus where known. An extensive index to all nominal taxa is included to facilitate use of the catalog. The glossosomatid species Mexitrichia usseglioi Rueda Martín & Gibon, is transferred to Mortoniella comb. n. PMID:28331396

  3. Tween consumers: catalog clothing purchase behavior.

    PubMed

    Simpson, L; Douglas, S; Schimmel, J

    1998-01-01

    The purpose of this study was to compare the catalog shopping behavior of students in their tween years (i.e., between childhood and adolescence; ages 12-14) with that of older students (ages 15-18). Junior high and high school students who had purchased clothing from a catalog in the past 12 months responded to a questionnaire that examined the label information sought and product-specific attributes considered. Results indicated that tweens were more concerned with style, brand names, and the latest fashion than were older students. This finding was especially interesting, as these attributes all relate to status; the tweens were more interested than the older students in wearing the latest fashions, being in style, and gaining the prestige of wearing brand-name clothing. This supports previous findings indicating that the tween years are a time when peer pressure and "fitting in" are very important.

  4. Catalog of data bases and reports

    SciTech Connect

    Burtis, M.D.

    1992-04-01

    The Catalog of Data Bases and Reports provides information about the many reports and other materials made available by the US Department of Energy's Global Change Research Program (GCRP). It is divided into six sections plus an author and a title index: (1) Research plans and budget summaries (2) technical reports; (3) workshops, proceedings, and reports; (4) other reports; (5) USDA reports on response of vegetation to carbon dioxide; and, (6) numeric data packages and computer model packages.

  5. Catalog of data bases and reports

    SciTech Connect

    Burtis, M.D.

    1992-04-01

    The Catalog of Data Bases and Reports provides information about the many reports and other materials made available by the US Department of Energy`s Global Change Research Program (GCRP). It is divided into six sections plus an author and a title index: (1) Research plans and budget summaries (2) technical reports; (3) workshops, proceedings, and reports; (4) other reports; (5) USDA reports on response of vegetation to carbon dioxide; and, (6) numeric data packages and computer model packages.

  6. The BMW-Chandra Serendipitous Source Catalog

    NASA Astrophysics Data System (ADS)

    Romano, P.; Campana, S.; Mignani, R. P.; Moretti, A.; Mottini, M.; Panzera, M. R.; Tagliaferri, G.

    2004-08-01

    We present the BMW-Chandra source catalog drawn from all Chandra ACIS-I pointed observations with an exposure time in excess of 10 ks public as of March 2003 (136 observations). Using the wavelet detection algorithm developed by Lazzati et al. (1999) and Campana et al. (1999), which can characterize point-like as well as extended sources, we identified 21325 sources. Among them, 16758 are serendipitous, i.e. not associated with the targets of the pointings, and do not require a non-automated analysis. This makes our catalog the largest compilation of Chandra sources to date. The 0.5--10 keV absorption corrected fluxes of these sources range from ˜ 3× 10-16 to 9×10-12 erg cm-2 s-1 with a median of 7× 10-15 erg cm-2 s-1. The catalog consists of count rates and relative errors in three energy bands (total, 0.5--7 keV; soft, 0.5--2 keV; and hard band, 2--7 keV), and source positions relative to the highest signal-to-noise detection among the three bands. The wavelet algorithm also provides an estimate of the extension of the source which we refined with a σ -clipping method. We report on the main properties of the sources in our catalog, such as sky coverage ( ˜ 8 deg2 at a limiting flux of ˜ 10-13 erg cm-2 s-1) and cosmological log N--log S for a subset at high Galactic latitude (∣ b ∣ > 20o) for a flux as low as ˜ 1.5 × 10-15 erg cm-2 s-1. Support for this work was provided by the Italian MIUR.

  7. Catalog of Hawaiian earthquakes, 1823-1959

    USGS Publications Warehouse

    Klein, Fred W.; Wright, Thomas L.

    2000-01-01

    This catalog of more than 17,000 Hawaiian earthquakes (of magnitude greater than or equal to 5), principally located on the Island of Hawaii, from 1823 through the third quarter of 1959 is designed to expand our ability to evaluate seismic hazard in Hawaii, as well as our knowledge of Hawaiian seismic rhythms as they relate to eruption cycles at Kilauea and Mauna Loa volcanoes and to subcrustal earthquake patterns related to the tectonic evolution of the Hawaiian chain.

  8. Version 1 of the Hubble Source Catalog

    NASA Astrophysics Data System (ADS)

    Whitmore, Bradley

    2015-08-01

    The Hubble Source Catalog (HSC) is designed to help optimize science from the Hubble Space Telescope by combining the tens of thousands of visit-based Hubble Legacy Archive (HLA - available at http://hla.stsci.edu) source lists into a single master catalog. The HSC includes ACS/WFC, WFPC2, and WFC3 source lists generated using the Source Extractor software (Bertin & Arnouts 1996). The current version of the catalog includes roughly 80 million detections of 30 million objects involving 112 different detector/filter combinations and about 50 thousand HST exposures cross-matched using the technique described in Budavari & Lubow (2012). The astrometric residuals for HSC objects are typically within 10 mas and the magnitude residuals between repeat measurements are generally within 0.10 mag. Version 1 of the HSC was released on February 25, 2015. The primary ways to access the HSC are the MAST Discovery Portal (http://mast.stsci.edu), and a CasJobs capability for advanced searches. Detailed use cases and videos are available to help researchers get started. The HSC will be an important reference for future telescopes, such as the James Webb Space Telescope and survey programs such as Pan-STARRS and LSST. The URL for the HSC is http://archive.stsci.edu/hst/hsc/ .

  9. Catalog of lunar and Mars science payloads

    NASA Technical Reports Server (NTRS)

    Budden, Nancy Ann (Editor)

    1994-01-01

    This catalog collects and describes science payloads considered for future robotic and human exploration missions to the Moon and Mars. The science disciplines included are geosciences, meteorology, space physics, astronomy and astrophysics, life sciences, in-situ resource utilization, and robotic science. Science payload data is helpful for mission scientists and engineers developing reference architectures and detailed descriptions of mission organizations. One early step in advanced planning is formulating the science questions for each mission and identifying the instrumentation required to address these questions. The next critical element is to establish and quantify the supporting infrastructure required to deliver, emplace, operate, and maintain the science experiments with human crews or robots. This requires a comprehensive collection of up-to-date science payload information--hence the birth of this catalog. Divided into lunar and Mars sections, the catalog describes the physical characteristics of science instruments in terms of mass, volume, power and data requirements, mode of deployment and operation, maintenance needs, and technological readiness. It includes descriptions of science payloads for specific missions that have been studied in the last two years: the Scout Program, the Artemis Program, the First Lunar Outpost, and the Mars Exploration Program.

  10. The Mw=8.8 Maule earthquake aftershock sequence, event catalog and locations

    NASA Astrophysics Data System (ADS)

    Meltzer, A.; Benz, H.; Brown, L.; Russo, R. M.; Beck, S. L.; Roecker, S. W.

    2011-12-01

    The aftershock sequence of the Mw=8.8 Maule earthquake off the coast of Chile in February 2010 is one of the most well-recorded aftershock sequences from a great megathrust earthquake. Immediately following the Maule earthquake, teams of geophysicists from Chile, France, Germany, Great Britain and the United States coordinated resources to capture aftershocks and other seismic signals associated with this significant earthquake. In total, 91 broadband, 48 short period, and 25 accelerometers stations were deployed above the rupture zone of the main shock from 33-38.5°S and from the coast to the Andean range front. In order to integrate these data into a unified catalog, the USGS National Earthquake Information Center develop procedures to use their real-time seismic monitoring system (Bulletin Hydra) to detect, associate, location and compute earthquake source parameters from these stations. As a first step in the process, the USGS has built a seismic catalog of all M3.5 or larger earthquakes for the time period of the main aftershock deployment from March 2010-October 2010. The catalog includes earthquake locations, magnitudes (Ml, Mb, Mb_BB, Ms, Ms_BB, Ms_VX, Mc), associated phase readings and regional moment tensor solutions for most of the M4 or larger events. Also included in the catalog are teleseismic phases and amplitude measures and body-wave MT and CMT solutions for the larger events, typically M5.5 and larger. Tuning of automated detection and association parameters should allow a complete catalog of events to approximately M2.5 or larger for that dataset of more than 164 stations. We characterize the aftershock sequence in terms of magnitude, frequency, and location over time. Using the catalog locations and travel times as a starting point we use double difference techniques to investigate relative locations and earthquake clustering. In addition, phase data from candidate ground truth events and modeling of surface waves can be used to calibrate the

  11. Cluster headache

    MedlinePlus

    Histamine headache; Headache - histamine; Migrainous neuralgia; Headache - cluster; Horton's headache; Vascular headache - cluster ... be related to the body's sudden release of histamine (chemical in the body released during an allergic ...

  12. New Star Clusters Discovered in the GLIMPSE Survey

    NASA Astrophysics Data System (ADS)

    Mercer, E. P.; Clemens, D. P.; Meade, M. R.; Babler, B. L.; Indebetouw, R.; Whitney, B. A.; Watson, C.; Wolfire, M. G.; Wolff, M. J.; Bania, T. M.; Benjamin, R. A.; Cohen, M.; Dickey, J. M.; Jackson, J. M.; Kobulnicky, H. A.; Mathis, J. S.; Stauffer, J. R.; Stolovy, S. R.; Uzpen, B.; Churchwell, E. B.

    2005-12-01

    A systematic and automated search of the extensive GLIMPSE mid-infrared survey data of the inner Galaxy was carried out to uncover new star clusters. This search has yielded 59 new clusters. Using our automated search algorithm, these clusters were identified as significant localized overdensities in the GLIMPSE point-source catalog (GLMC) and archive (GLMA). Subsequent visual inspection of the GLIMPSE image mosaics confirmed the existence of these clusters plus an additional 33 heavily embedded clusters missed by our detection algorithm, for a total of 92 newly discovered clusters. These previously uncataloged clusters range in type from heavily embedded to fully exposed clusters. More than half of the clusters have memberships exceeding 35 stars, and nearly all the clusters have diameters of 3' or less. The Galactic latitude distribution of the clusters reveals that the majority are concentrated toward the Galactic midplane. There is an asymmetry in the number of clusters located above and below the midplane, with more clusters detected below the midplane. We also observe an asymmetry in the number of clusters detected in the northern and southern halves of the Galaxy, with more than twice as many clusters detected in the south.

  13. Clustering with Missing Values: No Imputation Required

    NASA Technical Reports Server (NTRS)

    Wagstaff, Kiri

    2004-01-01

    Clustering algorithms can identify groups in large data sets, such as star catalogs and hyperspectral images. In general, clustering methods cannot analyze items that have missing data values. Common solutions either fill in the missing values (imputation) or ignore the missing data (marginalization). Imputed values are treated as just as reliable as the truly observed data, but they are only as good as the assumptions used to create them. In contrast, we present a method for encoding partially observed features as a set of supplemental soft constraints and introduce the KSC algorithm, which incorporates constraints into the clustering process. In experiments on artificial data and data from the Sloan Digital Sky Survey, we show that soft constraints are an effective way to enable clustering with missing values.

  14. VizieR Online Data Catalog: LAMOST DR1 catalogs (Luo+, 2015)

    NASA Astrophysics Data System (ADS)

    Luo, A.-L.; Zhao, Y.-H.; Zhao, G.; Deng, L.-C.; Liu, X.-W.; Jing, Y.-P.; Wang, G.; Zhang, H.-T.; Shi, J.-R.; Cui, X.-Q.; Chu, Y.-Q.; Li, G.-P.; Bai, Z.-R.; Wu, Y.; Cai, Y.; Cao, S.-Y.; Cao, Z.-H.; Carlin, J. L.; Chen, H.-Y.; Chen, J.-J.; Chen, K.-X.; Chen, L.; Chen, X.-L.; Chen, X.-Y.; Chen, Y.; Christlieb, N.; Chu, J.-R.; Cui, C.-Z.; Dong, Y.-Q.; Du, B.; Fan, D.-W.; Feng, L.; Fu, J.-N.; Gao, P.; Gong, X.-F.; Gu, B.-Z.; Guo, Y.-X.; Han, Z.-W.; He, B.-L.; Hou, J.-L.; Hou, Y.-H.; Hou, W.; Hu, H.-Z.; Hu, N.-S.; Hu, Z.-W.; Huo, Z.-Y.; Jia, L.; Jiang, F.-H.; Jiang, X.; Jiang, Z.-B.; Jin, G.; Kong, X.; Kong, X.; Lei, Y.-J.; Li, A.-H.; Li, C.-H.; Li, G.-W.; Li, H.-N.; Li, J.; Li, Q.; Li, S.; Li, S.-S.; Li, X.-N.; Li, Y.; Li, Y.-B.; Li, Y.-P.; Liang, Y.; Lin, C.-C.; Liu, C.; Liu, G.-R.; Liu, G.-Q.; Liu, Z.-G.; Lu, W.-Z.; Luo, Y.; Mao, Y.-D.; Newberg, H.; Ni, J.-J.; Qi, Z.-X.; Qi, Y.-J.; Shen, S.-Y.; Shi, H.-M.; Song, J.; Song, Y.-H.; Su, D.-Q.; Su, H.-J.; Tang, Z.-H.; Tao, Q.-S.; Tian, Y.; Wang, D.; Wang, D.-Q.; Wang, F.-F.; Wang, G.-M.; Wang, H.; Wang, H.-C.; Wang, J.; Wang, J.-N.; Wang, J.-L.; Wang, J.-P.; Wang, J.-X.; Wang, L.; Wang, M.-X.; Wang, S.-G.; Wang, S.-Q.; Wang, X.; Wang, Y.-N.; Wang, Y.; Wang, Y.-F.; Wang, Y.-F.; Wei, P.; Wei, M.-Z.; Wu, H.; Wu, K.-F.; Wu, X.-B.; Wu, Y.-Z.; Xing, X.-Z.; Xu, L.-Z.; Xu, X.-Q.; Xu, Y.; Yan, T.-S.; Yang, D.-H.; Yang, H.-F.; Yang, H.-Q.; Yang, M.; Yao, Z.-Q.; Yu, Y.; Yuan, H.; Yuan, H.-B.; Yuan, H.-L.; Yuan, W.-M.; Zhai, C.; Zhang, E.-P.; Zhang, H.-W.; Zhang, J.-N.; Zhang, L.-P.; Zhang, W.; Zhang, Y.; Zhang, Y.-X.; Zhang, Z.-C.; Zhao, M.; Zhou, F.; Zhou, X.; Zhu, J.; Zhu, Y.-T.; Zou, S.-C.; Zuo, F.

    2015-11-01

    The LAMOST general catalog includes 717469 objects obtained from the LAMOST pilot survey, which contain 648746 stars, 2723 galaxies, 621 quasars and 65406 unknown objects, and 1487200 objects obtained from the LAMOST general survey, which contain 1295583 stars, 9359 galaxies, 4396 quasars and 177862 unknown objects, so this catalog totally includes 2204696 objects including 1,944,329 stars, 12082 galaxies, 5017 quasars and 243268 unknown objects. In this catalog, there are 1186132 objects with SNR of g band larger than 10, 1680794 objects with SNR of i band larger than 10, and 1746202 objects with SNR of g band larger than 10 and SNR of i band larger than 10. (6 data files).

  15. The new NHGRI-EBI Catalog of published genome-wide association studies (GWAS Catalog)

    PubMed Central

    MacArthur, Jacqueline; Bowler, Emily; Cerezo, Maria; Gil, Laurent; Hall, Peggy; Hastings, Emma; Junkins, Heather; McMahon, Aoife; Milano, Annalisa; Morales, Joannella; Pendlington, Zoe May; Welter, Danielle; Burdett, Tony; Hindorff, Lucia; Flicek, Paul; Cunningham, Fiona; Parkinson, Helen

    2017-01-01

    The NHGRI-EBI GWAS Catalog has provided data from published genome-wide association studies since 2008. In 2015, the database was redesigned and relocated to EMBL-EBI. The new infrastructure includes a new graphical user interface (www.ebi.ac.uk/gwas/), ontology supported search functionality and an improved curation interface. These developments have improved the data release frequency by increasing automation of curation and providing scaling improvements. The range of available Catalog data has also been extended with structured ancestry and recruitment information added for all studies. The infrastructure improvements also support scaling for larger arrays, exome and sequencing studies, allowing the Catalog to adapt to the needs of evolving study design, genotyping technologies and user needs in the future. PMID:27899670

  16. VizieR Online Data Catalog: SPM 4.0 Catalog (Girard+, 2011)

    NASA Astrophysics Data System (ADS)

    Girard, T. M.; van Altena, W. F.; Zacharias, N.; Vieira, K.; Casetti-Dinescu, D. I.; Castillo, D.; Herrera, D.; Lee, Y. S.; Beers, T. C.; Monet, D. G.; Lopez, C. E.

    2011-03-01

    The SPM4 Catalog contains absolute proper motions, celestial coordinates, and B,V photometry for 103,319,647 stars and galaxies between the south celestial pole and -20 degrees declination. The catalog is roughly complete to V=17.5. It is based on photographic and CCD observations taken with the Yale Southern Observatory's double-astrograph at Cesco Observatory in El Leoncito, Argentina. The first-epoch survey, taken from 1965 to 1979, was entirely photographic. The second-epoch survey is approximately 1/3 photographic (taken from 1988 to 1998) and 2/3 CCD-based (taken from 2004 through 2008). Full details about the creation of the SPM4.0 catalog can be found in the paper, and also in the document "spm4_doc.txt" file which describes the original files, accessible from http://www.astro.yale.edu/astrom/spm4cat/ (2 data files).

  17. GBM First-year Catalogs (with Some LAT GRB Catalogs as a Bonus)

    NASA Astrophysics Data System (ADS)

    Paciesas, William Simon; GBM, Fermi; LAT Collaborations

    2010-03-01

    The Fermi Gamma-ray Burst Monitor (GBM) monitors the entire unocculted sky for transient activity in the energy range from 8 keV to 40 MeV. In its first year of operation GBM's on-board trigger detected 253 gamma-ray bursts (GRBs), of which 9 were confidently detected by the LAT (a catalog of LAT upper limits for non-detected GRBs is also available). In addition, GBM triggered on 12 terrestrial gamma flashes and 168 soft gamma repeater events from four different magnetar candidates. GBM's continuous data collection over the entire sky allows continual hard X-ray monitoring of both steady and variable sources using Earth occultation and pulsed source analysis techniques. Catalogs of the GBM-detected source categories will be summarized and, if time permits, compared with relevant catalogs from other instruments such as CGRO/BATSE.

  18. VizieR Online Data Catalog: ASC Gaia Attitude Star Catalog (Smart, 2015)

    NASA Astrophysics Data System (ADS)

    Smart, R. L.

    2015-04-01

    The ASC is a compilation produced for the Gaia mission. We have combined data from the following catalogs or datasets to produce a homogenous list of positions, proper motions, photometry in a blue and red band and estimates of the magnitudes in the Gaia G and G_RVS bands: Tycho2, UCAC4, Hipparcos, PPMXL, GSC2.3 and Sky2000. Originally ASC sources were selected from the Initial Gaia Source List (IGSL, I/324). However, here we produce a cleaner catalog starting from the bright source catalogs and using the following criteria: 1) The candidate must be in the Tycho2, UCAC4, Hipparcos or Sky2000 catalog. 2) The Gaia G magnitude must be brighter than 13.4. 3) The star must be isolated from other objects of similar magnitudes 4) The object must not be in the Washington Double Star catalog 5) If a healpix 6th region has more than 1000 objects the magnitude limit is reduced to reduce the number of objects in that region. Since the ASC was produced independently from the IGSL using different procedures there is not a direct 1 to 1 match between ASC and IGSL entries. We have matched the ASC to the IGSL and found that 9 out of the 8 million entries do not have a clear match. Since there may still remain ambiguous matches in the 8 million matched objects, we decided to assign the sourceIDs of the IGSL with the adjustment that the runningnumber is equal to the IGSL runningnumber + 320000. Included Catalogs: Tycho2, UCAC4, Sky2000, HIPPARCOS for candidates and the PPMXL, GSC2.3 were used to calculating magnitudes. (2 data files).

  19. Meaningful Clusters

    SciTech Connect

    Sanfilippo, Antonio P.; Calapristi, Augustin J.; Crow, Vernon L.; Hetzler, Elizabeth G.; Turner, Alan E.

    2004-05-26

    We present an approach to the disambiguation of cluster labels that capitalizes on the notion of semantic similarity to assign WordNet senses to cluster labels. The approach provides interesting insights on how document clustering can provide the basis for developing a novel approach to word sense disambiguation.

  20. Observations of Distant Clusters

    NASA Technical Reports Server (NTRS)

    Donahue, Megan

    2004-01-01

    The is the proceedings and papers supported by the LTSA grant: Homer, D. J.\\& Donahue, M. 2003, in "The Emergence of Cosmic Structure": 13'h Astrophysics Conference Proceedings, Vol. 666,3 1 1-3 14, (AIP). Baumgartner, W. H., Loewenstein, M., Horner, D. J., Mushotzky, R. F. 2003, HEAD- AAS, 35.3503. Homer, D. J. , Donahue, M., Voit G. M. 2003, HEAD-AAS, 35.1309. Nowak, M. A., Smith, B., Donahue, M., Stocke, J. 2003, HEAD-AAS, 35.1316. Scott, D., Borys, C., Chapman, S. C., Donahue, M., Fahlman, G. G., Halpem, M. Newbury, P. 2002, AAS, 128.01. Jones, L. R. et al. 2002, A new era in cosmology, ASP Conference Proceedings, Vol. 283, p. 223 Donahue, M., Daly, R. A., Homer, D. J. 2003, ApJ, 584, 643, Constraints on the Cluster Environments and Hotspot magnetic field strengths for radio sources 3280 and 3254. Donahue, M., et al. 2003, ApJ, 598, 190. The mass, baryonic fraction, and x-ray temperature of the luminous, high-redshift cluster of galaxies MS045 1.6-0305 Perlman, E. S. et al. 2002, ApJS, 140, 256. Smith, B. J., Nowak, M., Donahue, M., Stocke, J. 2003, AJ, 126, 1763. Chandra Observations of the Interacting NGC44 10 Group of Galaxies. Postman, M., Lauer, T. R., Oegerle, W., Donahue, M. 2002, ApJ, 579, 93. The KPNO/deep-range cluster survey I. The catalog and space density of intermediate-redshift clusters. Molnar, S. M., Hughes, J. P., Donahue, M., Joy, M. 2002, ApJ, 573, L91, Chandra Observations of Unresolved X-Ray Sources around Two Clusters of Galaxies. Donahue, M., Mack, J., 2002 NewAR, 46, 155, HST NIcmos and WFPC2 observations of molecular hydrogen and dust around cooling flows. Koekemoer, A. M. et al. 2002 NewAR, 46, 149, Interactions between the A2597 central radio source and dense gas host galaxy. Donahue, M. et al. 2002 ApJ, 569,689, Distant cluster hunting II.

  1. WEST CORRIDOR (ORIGINALLY KNOWN AS LIBRARY OF CONGRESS CARD CATALOG) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    WEST CORRIDOR (ORIGINALLY KNOWN AS LIBRARY OF CONGRESS CARD CATALOG) ON FIRST FLOOR, LOOKING EAST - Free Library of Philadelphia, Central Library, 1901 Vine Street, Philadelphia, Philadelphia County, PA

  2. VizieR Online Data Catalog: The FIRST Survey Catalog, Version 2014Dec17 (Helfand+ 2015)

    NASA Astrophysics Data System (ADS)

    Helfand, D. J.; White, R. L.; Becker, R. H.

    2015-05-01

    The Faint Images of the Radio Sky at Twenty centimeters (FIRST) began in 1993. It uses the VLA (Very Large Array, a facility of the National Radio Observatory (NRAO)) at a frequency of 1.4GHz, and it is slated to 10,000 deg2 of the North and South Galactic Caps, to a sensitivity of about 1mJy with an angular resolution of about 5''. The images produced by an automated mapping pipeline have pixels of 1.8'', a typical rms of 0.15mJy, and a resolution of 5''; the images are available on the Internet (see the FIRST home page at http://sundog.stsci.edu/ for details). The source catalogue is derived from the images. This catalog from the 1993 through 2011 observations contains 946,432 sources from the north and south Galactic caps. It covers a total of 10,575 square degrees of the sky (8444 square degrees in the north and 2131 square degrees in the south). In this version of the catalog, images taken in the the new EVLA configuration have been re-reduced using shallower CLEAN thresholds in order to reduce the "CLEAN bias" in those images. Also, the EVLA images are not co-added with older VLA images to avoid problems resulting from the different frequencies and noise properties of the configurations. That leads to small gaps in the sky coverage at boundaries between the EVLA and VLA regions. As a result, the area covered by this release of the catalog is about 60 square degrees smaller than the earlier release of the catalog (13Jun05, also available here as the "first13.dat" file), and the total number of sources is reduced by nearly 25,000. The previous version of the catalog does have sources in the overlap regions, but their flux densities are considered unreliable due to calibration errors. The flux densities should be more accurate in this catalog, biases are smaller, and the incidence of spurious sources is also reduced. Over most of the survey area, the detection limit is 1 mJy. A region along the equatorial strip (RA=21.3 to 3.3hr, Dec=-1 to 1deg) has a deeper

  3. HST high-precision proper motions of globular clusters

    NASA Astrophysics Data System (ADS)

    Bellini, Andrea; Anderson, Jay; van der marel, roeland p.; piotto, gianpaolo; Watkins, Laura l.; Vesperini, Enrico; Milone, Antonino; Bedin, Luigi R.

    2015-08-01

    The stable environment of space makes HST an excellent astrometric tool. Its diffraction-limited resolution allows it to distinguish and measure positions and fluxes for stars all the way to the center of most globular clusters. There are now many clusters that have observations in the archive that span 13 years or more, and more observations are being taken all the time. We constructed high-precision proper-motion catalogs for over 20 clusters for which there exist two or more well-separated epochs in the archive, and we are extending the list to over 60 objects, thanks to the new observations taken within the ``HST UV Legacy Survey of Galactic Globular Clusters’’ treasury program. Each catalog contains astrometry and photometry for thousands of stars within two arcmin of the center. The catalogs are focused on the many stars within a few magnitudes of the turnoff and have typical proper-motion errors of 0.1 mas/yr, which translates to 2 km/s for the typical cluster. We are using proper motions to directly measure the clusters' anisotropy, equipartition and rotation on the plane of the sky, as well as to study internal kinematics of the different subpopulations and to probe the presence of an IMBH in their core.

  4. About the Clusters Program

    EPA Pesticide Factsheets

    The Environmental Technology Innovation Clusters Program advises cluster organizations, encourages collaboration between clusters, tracks U.S. environmental technology clusters, and connects EPA programs to cluster needs.

  5. Introducing the Japan Unified HIgh-Resolution Relocated Catalog for Earthquakes (JUICE) Project

    NASA Astrophysics Data System (ADS)

    Yano, T. E.; Takeda, T.; Shiomi, K.

    2013-12-01

    To understand the tectonic processes, seismogenic zones, and active fault evaluations, the precise location of earthquake hypocenters is necessary. Routinely determined hypocenters typically have uncertainties that can make seismically active areas appear more diffuse. These uncertainties influence the interpretation of what are active faults. Objective of this Japan Unified HIgh-resolution Relocated Catalog for Earthquakes (JUICE) project is to create a high-resolution earthquake relocated catalog for all of Japan. To initiate the project, we relocate hypocenters around Kanto-Tokai region. The network geometry, available phases, arrival-time reading accuracy, and knowledge of crustal structure control the accuracy of absolute hypocenter locations (Pavlis, 1986; Gomberg et al., 1990). We take advantage of having an excellent network operated by NIED Hi-net team. We use the high-quality data from this network for events from 2001 to the present. To initiate the JUICE project, we utilize more than 5,500,000 and 5,300,000 P and S phase arrival-time readings (catalog data) and waveforms for about 120,000 events between M0 and M6.5 from 2001 through 2012 in the Kanto and Tokai region. To reduce uncertainties, we apply the double-difference algorithm (hypoDD) by Waldhauser and Ellsworth (2000) to the data. To obtain the travel time differences for the pairs of earthquakes, we cross correlate the seismograms at the stations, which produces another data set -- cross-correlation data. In addition to the catalog phase data, we add 800,000 and 1,000,000 of P and S phase cross-correlations that are used to relocate hypocenters. We use Hi-net routine velocity structure (Ukawa et al., 1984) to estimate theoretical differential travel times. The newly relocated hypocenters show tighter clusters and lineaments compared to the routinely generated hypocenters. Figure 1 (a) shows the hypocenters in the Shizuoka region before relocation and (b) shows the hypocenters after relocation

  6. Estimating Cosmological Parameters and Cluster Masses through Escape Velocity Measurements in Galaxy Clusters

    NASA Astrophysics Data System (ADS)

    Gifford, Daniel William

    2016-08-01

    Galaxy clusters are large virialized structures that exist at the intersection of filaments of matter that make up the cosmic web. Due to their hierarchical growth history, they are excellent probes of the cosmology that governs our universe. Here, we aim to use clusters to better constrain cosmological parameters by systematically studying the uncertainties on galaxy cluster mass estimation for use in a halo mass function analysis. We find that the caustic technique is capable on average of recovering unbiased cluster masses to within 30% for well sampled systems. We also quantify potential statistical and systematic biases due to observational challenges. To address statistical biases in the caustic technique, we developed a new stacking algorithm to measure the average cluster mass for a single stack of projected cluster phase-spaces. By varying the number of galaxies and number of clusters we stack, we find that the single limited value is the total number of galaxies in the stack opening up the possibility for self-calibrated mass estimates of low mass or poorly sampled clusters in large surveys. We then utilize the SDSS-C4 catalog of galaxy clusters to place some of the tightest galaxy cluster based constraints on the matter density and power spectrum normalization for matter in our universe.

  7. Users Look at Online Catalogs. Part 2: Interacting with Online Catalogs. Final Report.

    ERIC Educational Resources Information Center

    Larson, Ray R.

    This report focuses on a discussion of findings from analyses of computer transaction logs contributed by four of the online catalog systems used in the Public Access Project. It supplements the analyses of User and Non-User Questionnaires by providing analyses of data from the systems themselves. The four systems contributing data to this…

  8. VizieR Online Data Catalog: Fermi LAT third source catalog (3FGL) (Acero+, 2015)

    NASA Astrophysics Data System (ADS)

    Acero, F.; Ackermann, M.; Ajello, M.; Albert, A.; Atwood, W. B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Belfiore, A.; Bellazzini, R.; Bissaldi, E.; Blandford, R. D.; Bloom, E. D.; Bogart, J. R.; Bonino, R.; Bottacini, E.; Bregeon, J.; Britto, R. J.; Bruel, P.; Buehler, R.; Burnett, T. H.; Buson, S.; Caliandro, G. A.; Cameron, R. A.; Caputo, R.; Caragiulo, M.; Caraveo, P. A.; Casandjian, J. M.; Cavazzuti, E.; Charles, E.; Chaves, R. C. G.; Chekhtman, A.; Cheung, C. C.; Chiang, J.; Chiaro, G.; Ciprini, S.; Claus, R.; Cohen-Tanugi, J.; Cominsky, L. R.; Conrad, J.; Cutini, S.; D'Ammando, F.; de Angelis, A.; Deklotz, M.; de Palma, F.; Desiante, R.; Digel, S. W.; di Venere, L.; Drell, P. S.; Dubois, R.; Dumora, D.; Favuzzi, C.; Fegan, S. J.; Ferrara, E. C.; Finke, J.; Franckowiak, A.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Giebels, B.; Giglietto, N.; Giommi, P.; Giordano, F.; Giroletti, M.; Glanzman, T.; Godfrey, G.; Grenier, I. A.; Grondin, M.-H.; Grove, J. E.; Guillemot, L.; Guiriec, S.; Hadasch, D.; Harding, A. K.; Hays, E.; Hewitt, J. W.; Hill, A. B.; Horan, D.; Iafrate, G.; Jogler, T.; Johannesson, G.; Johnson, R. P.; Johnson, A. S.; Johnson, T. J.; Johnson, W. N.; Kamae, T.; Kataoka, J.; Katsuta, J.; Kuss, M.; La Mura, G.; Landriu, D.; Larsson, S.; Latronico, L.; Lemoine-Goumard, M.; Li, J.; Li, L.; Longo, F.; Loparco, F.; Lott, B.; Lovellette, M. N.; Lubrano, P.; Madejski, G. M.; Massaro, F.; Mayer, M.; Mazziotta, M. N.; McEnery, J. E.; Michelson, P. F.; Mirabal, N.; Mizuno, T.; Moiseev, A. A.; Mongelli, M.; Monzani, M. E.; Morselli, A.; Moskalenko, I. V.; Murgia, S.; Nuss, E.; Ohno, M.; Ohsugi, T.; Omodei, N.; Orienti, M.; Orlando, E.; Ormes, J. F.; Paneque, D.; Panetta, J. H.; Perkins, J. S.; Pesce-Rollins, M.; Piron, F.; Pivato, G.; Porter, T. A.; Racusin, J. L.; Rando, R.; Razzano, M.; Razzaque, S.; Reimer, A.; Reimer, O.; Reposeur, T.; Rochester, L. S.; Romani, R. W.; Salvetti, D.; Sanchez-Conde, M.; Saz Parkinson, P. M.; Schulz, A.; Siskind, E. J.; Smith, D. A.; Spada, F.; Spandre, G.; Spinelli, P.; Stephens, T. E.; Strong, A. W.; Suson, D. J.; Takahashi, H.; Takahashi, T.; Tanaka, Y.; Thayer J. G, .; Thayer, J. B.; Thompson, D. J.; Tibaldo, L.; Tibolla, O.; Torres, D. F.; Torresi, E.; Tosti, G.; Troja, E.; van Klaveren, B.; Vianello, G.; Winer, B. L.; Wood, K. S.; Wood, M.; Zimmer, S.

    2015-08-01

    The data for the 3FGL catalog were taken during the period from 2008 August 4 (15:43 UTC) to 2012 July 31 (22:46 UTC), to covering close to 4yr. The LAT detects γ-rays in the energy range from 20MeV to more than 300GeV. (3 data files).

  9. SACS: Spitzer Archival Cluster Survey

    NASA Astrophysics Data System (ADS)

    Stern, Daniel

    Emerging from the cosmic web, galaxy clusters are the most massive gravitationally bound structures in the universe. Thought to have begun their assembly at z > 2, clusters provide insights into the growth of large-scale structure as well as the physics that drives galaxy evolution. Understanding how and when the most massive galaxies assemble their stellar mass, stop forming stars, and acquire their observed morphologies in these environments remain outstanding questions. The redshift range 1.3 < z < 2 is a key epoch in this respect: elliptical galaxies start to become the dominant population in cluster cores, and star formation in spiral galaxies is being quenched. Until recently, however, this redshift range was essentially unreachable with available instrumentation, with clusters at these redshifts exceedingly challenging to identify from either ground-based optical/nearinfrared imaging or from X-ray surveys. Mid-infrared (MIR) imaging with the IRAC camera on board of the Spitzer Space Telescope has changed the landscape. High-redshift clusters are easily identified in the MIR due to a combination of the unique colors of distant galaxies and a negative k-correction in the 3-5 μm range which makes such galaxies bright. Even 90-sec observations with Spitzer/IRAC, a depth which essentially all extragalactic observations in the archive achieve, is sufficient to robustly detect overdensities of L* galaxies out to z~2. Here we request funding to embark on a ambitious scientific program, the “SACS: Spitzer Archival Cluster Survey”, a comprehensive search for the most distant galaxy clusters in all Spitzer/IRAC extragalactic pointings available in the archive. With the SACS we aim to discover ~2000 of 1.3 < z < 2.5 clusters, thus provide the ultimate catalog for high-redshift MIR selected clusters: a lasting legacy for Spitzer. The study we propose will increase by more than a factor of 10 the number of high-redshift clusters discovered by all previous surveys

  10. An Improved Cluster Richness Estimator

    SciTech Connect

    Rozo, Eduardo; Rykoff, Eli S.; Koester, Benjamin P.; McKay, Timothy; Hao, Jiangang; Evrard, August; Wechsler, Risa H.; Hansen, Sarah; Sheldon, Erin; Johnston, David; Becker, Matthew R.; Annis, James T.; Bleem, Lindsey; Scranton, Ryan; /Pittsburgh U.

    2009-08-03

    Minimizing the scatter between cluster mass and accessible observables is an important goal for cluster cosmology. In this work, we introduce a new matched filter richness estimator, and test its performance using the maxBCG cluster catalog. Our new estimator significantly reduces the variance in the L{sub X}-richness relation, from {sigma}{sub lnL{sub X}}{sup 2} = (0.86 {+-} 0.02){sup 2} to {sigma}{sub lnL{sub X}}{sup 2} = (0.69 {+-} 0.02){sup 2}. Relative to the maxBCG richness estimate, it also removes the strong redshift dependence of the richness scaling relations, and is significantly more robust to photometric and redshift errors. These improvements are largely due to our more sophisticated treatment of galaxy color data. We also demonstrate the scatter in the L{sub X}-richness relation depends on the aperture used to estimate cluster richness, and introduce a novel approach for optimizing said aperture which can be easily generalized to other mass tracers.

  11. The Richness Dependence of Galaxy Cluster Correlations: Results From A Redshift Survey Of Rich APM Clusters

    NASA Technical Reports Server (NTRS)

    Croft, R. A. C.; Dalton, G. B.; Efstathiou, G.; Sutherland, W. J.; Maddox, S. J.

    1997-01-01

    We analyze the spatial clustering properties of a new catalog of very rich galaxy clusters selected from the APM Galaxy Survey. These clusters are of comparable richness and space density to Abell Richness Class greater than or equal to 1 clusters, but selected using an objective algorithm from a catalog demonstrably free of artificial inhomogeneities. Evaluation of the two-point correlation function xi(sub cc)(r) for the full sample and for richer subsamples reveals that the correlation amplitude is consistent with that measured for lower richness APM clusters and X-ray selected clusters. We apply a maximum likelihood estimator to find the best fitting slope and amplitude of a power law fit to x(sub cc)(r), and to estimate the correlation length r(sub 0) (the value of r at which xi(sub cc)(r) is equal to unity). For clusters with a mean space density of 1.6 x 10(exp -6) h(exp 3) MpC(exp -3) (equivalent to the space density of Abell Richness greater than or equal to 2 clusters), we find r(sub 0) = 21.3(+11.1/-9.3) h(exp -1) Mpc (95% confidence limits). This is consistent with the weak richness dependence of xi(sub cc)(r) expected in Gaussian models of structure formation. In particular, the amplitude of xi(sub cc)(r) at all richnesses matches that of xi(sub cc)(r) for clusters selected in N-Body simulations of a low density Cold Dark Matter model.

  12. STELLAR ENCOUNTER RATE IN GALACTIC GLOBULAR CLUSTERS

    SciTech Connect

    Bahramian, Arash; Heinke, Craig O.; Sivakoff, Gregory R.; Gladstone, Jeanette C.

    2013-04-01

    The high stellar densities in the cores of globular clusters cause significant stellar interactions. These stellar interactions can produce close binary mass-transferring systems involving compact objects and their progeny, such as X-ray binaries and radio millisecond pulsars. Comparing the numbers of these systems and interaction rates in different clusters drives our understanding of how cluster parameters affect the production of close binaries. In this paper we estimate stellar encounter rates ({Gamma}) for 124 Galactic globular clusters based on observational data as opposed to the methods previously employed, which assumed 'King-model' profiles for all clusters. By deprojecting cluster surface brightness profiles to estimate luminosity density profiles, we treat 'King-model' and 'core-collapsed' clusters in the same way. In addition, we use Monte Carlo simulations to investigate the effects of uncertainties in various observational parameters (distance, reddening, surface brightness) on {Gamma}, producing the first catalog of globular cluster stellar encounter rates with estimated errors. Comparing our results with published observations of likely products of stellar interactions (numbers of X-ray binaries, numbers of radio millisecond pulsars, and {gamma}-ray luminosity) we find both clear correlations and some differences with published results.

  13. VizieR Online Data Catalog: Radial velocities in Omega Cen (NGC5139) (Reijns+, 2006)

    NASA Astrophysics Data System (ADS)

    Reijns, R. A.; Seitzer, P.; Arnold, R.; Freeman, K. C.; Ingerson, T.; van den Bosch, R. C. E.; van de Ven, G.; de Zeeuw, P. T.

    2005-11-01

    List of 1966 radial velocity measurements of stars in globular cluster Omega Centauri (NGC 5139) taken with the ARGUS multi-object spectrometer at the CTIO 4m Blanco telescope. All the stars have a B magnitude brighter than 16.5. The median error is less than 2km/s. The stars are numbered using their LID (Leiden Identification Number) from van Leeuwen et.al. (2000, Cat. ). In a companion paper by van de Ven et al. (2006A&A...445..513V), we correct these radial velocities for the perspective rotation caused by the space motion of the cluster. Additionaly 339 stars where measured. These consist of (i) 87 stars with B-V<0.4, (ii) 252 stars not in the van Leeuwen et al. catalog. We suspect that that many of these stars have an erroneous value for their radial velocity. (2 data files).

  14. VizieR Online Data Catalog: Radial velocity and photometry in NGC 4372 (Kacharov+, 2014)

    NASA Astrophysics Data System (ADS)

    Kacharov, N.; Bianchini, P.; Koch, A.; Frank, M. J.; Martin, N. F.; van de Ven, G.; Puzia, T. H.; McDonald, I.; Johnson, C. I.; Zijlstra, A. A.

    2014-06-01

    We present the radial velocities of 220 stars in the field of the globular cluster NGC 4372 measured from high resolution FLAMES/GIRAFFE spectra. We have confirm 131 cluster member stars from radial velocity and metallicity constraints. The rest are foreground contaminants. We also present a BVI photometric catalogue in a field of view covering 30x30arcmin, centred on NGC 4372. We used archival imaging obtained with the Wide Field Imager (WFI) at the 2.2m MPG/ESO telescope at La Silla. We used the 2MASS point source catalog as astrometric reference. Photometric zero points were fixed to standard stars in the same field from the standard star database of Stetson (2000PASP..112..925S, 2005PASP..117..563S). We have estimated individual reddening for each star in the catalogue. (2 data files).

  15. Data Clustering

    NASA Astrophysics Data System (ADS)

    Wagstaff, Kiri L.

    2012-03-01

    On obtaining a new data set, the researcher is immediately faced with the challenge of obtaining a high-level understanding from the observations. What does a typical item look like? What are the dominant trends? How many distinct groups are included in the data set, and how is each one characterized? Which observable values are common, and which rarely occur? Which items stand out as anomalies or outliers from the rest of the data? This challenge is exacerbated by the steady growth in data set size [11] as new instruments push into new frontiers of parameter space, via improvements in temporal, spatial, and spectral resolution, or by the desire to "fuse" observations from different modalities and instruments into a larger-picture understanding of the same underlying phenomenon. Data clustering algorithms provide a variety of solutions for this task. They can generate summaries, locate outliers, compress data, identify dense or sparse regions of feature space, and build data models. It is useful to note up front that "clusters" in this context refer to groups of items within some descriptive feature space, not (necessarily) to "galaxy clusters" which are dense regions in physical space. The goal of this chapter is to survey a variety of data clustering methods, with an eye toward their applicability to astronomical data analysis. In addition to improving the individual researcher’s understanding of a given data set, clustering has led directly to scientific advances, such as the discovery of new subclasses of stars [14] and gamma-ray bursts (GRBs) [38]. All clustering algorithms seek to identify groups within a data set that reflect some observed, quantifiable structure. Clustering is traditionally an unsupervised approach to data analysis, in the sense that it operates without any direct guidance about which items should be assigned to which clusters. There has been a recent trend in the clustering literature toward supporting semisupervised or constrained

  16. A NEW CATALOG OF H II REGIONS IN M31

    SciTech Connect

    Azimlu, M.; Marciniak, R.; Barmby, P.

    2011-10-15

    We present a new catalog of H II regions in M31. The full disk of the galaxy ({approx}24 kpc from the galaxy center) is covered in a 2.2 deg{sup 2} mosaic of 10 fields observed with the Mosaic Camera on the Mayall 4 m telescope as part of the Local Group Galaxies survey. We used HIIphot, a code for automated photometry of H II regions, to identify the regions and measure their fluxes and sizes. A 10{sigma} detection level was used to exclude diffuse gas fluctuations and star residuals after continuum subtraction. That selection limit may result in missing some faint H II regions, but our catalog of 3691 H II regions is still complete to a luminosity of L{sub H{alpha}} = 10{sup 34} erg s{sup -1}. This is five times fainter than the only previous CCD-based study which contained 967 objects in the NE half of M31. We determined the H{alpha} luminosity function (LF) by fitting a power law to luminosities larger than L{sub H{alpha}} = 10{sup 36.7} and determined a slope of 2.52 {+-} 0.07. The in-arm and inter-arm LFs peak at different luminosities but they have similar bright-end slopes. The inter-arm regions are less populated (40% of total detected regions) and constitute only 14% of the total luminosity of L{sub H{alpha}} = 5.6 x 10{sup 40} erg s{sup -1} (after extinction correction and considering 65% contribution from diffused ionized gas). A star formation rate of 0.44 M{sub sun} yr{sup -1} was estimated from the H{alpha} total luminosity; this value is consistent with the determination from the Spitzer 8 {mu}m image. We removed all known and potential planetary nebulae, yet we found a double-peaked LF. The inter-arm older population suggests a starburst between 15 and 20 million years ago. This result is in agreement with UV studies of the star formation history in M31 which found a star formation rate decrease in the recent past. We found a fair spatial correlation between the H II regions and stellar clusters in selected star-forming regions. Most of the matched

  17. Microform Catalogs: A Viable Alternative for Texas Libraries.

    ERIC Educational Resources Information Center

    Cox, Carolyn, M.; Juergens, Bonnie

    This project proposed to develop and test the use of microform catalogs produced from computer-generated magnetic tape records in both fiche and film formats. The Computer Output Microform (COM) catalog developed for this purpose is a union list of titles from the five participating libraries--Houston and Dallas Public Libraries, Texas State…

  18. Subject Access in Online Catalogs: A Design Model.

    ERIC Educational Resources Information Center

    Bates, Marcia J.

    1986-01-01

    Presents a model for the design of online catalog subject access based on three principles: the uncertainty of subject indexing, the need for greater variety in searcher's queries, and the complexity of the search process. The proposed system is based on existing Library of Congress subject cataloging. (EM)

  19. FRBR Cataloging's Future Is Closer than You Think!

    ERIC Educational Resources Information Center

    Adamich, Tom

    2007-01-01

    Through the decades, the kinds of materials found in libraries have grown and changed, adapting to the needs of library users as well as economic, social, and even environmental factors. Similarly, the presentation format for cataloging content has changed. Another change is about to emerge in cataloging, and its name is FRBR (Functional…

  20. VizieR Online Data Catalog: MEXSAS catalogue (Vagnetti+, 2016)

    NASA Astrophysics Data System (ADS)

    Vagnetti, F.; Middei, R.; Antonucci, M.; Paolillo, M.; Serafinelli, R.

    2016-08-01

    We present the catalog of the Multi-Epoch XMM Serendipitous AGN Sample (MEXSAS), extracted from the fifth release of the XMM-Newton Serendipitous Source Catalogue (XMMSSC-DR5) and cross-matched with the Sloan Digital Sky Survey Quasar catalogs DR7Q and DR12Q. It contains 2700 repeatedly observed AGN, with corrected excess variance information. (1 data file).

  1. Data Mining for Double Stars in Astrometric Catalogs

    DTIC Science & Technology

    2006-03-22

    Astron. Gesell . de Ball (1904) 76 WFD1906a........... Cape General Catalog Gill (1906) 11 WFD1906b........... Kat. der Astron. Gesell . Becker (1906... Gesell . Skinner (1908) 73 WFD1909............. Greenwich Second Nine Year Catalog Christie (1909) 127 WFD1914............. Abbadia Observatory (Algiers

  2. Telecommuting for Original Cataloging at the Michigan State University Libraries.

    ERIC Educational Resources Information Center

    Black, Leah; Hyslop, Colleen

    1995-01-01

    Working conditions in library technical services departments can be a problem for catalogers in need of a quiet work environment. Based on a successful program for indexers at the National Agriculture Library, a proposal for an experimental telecommuting program for original cataloging at the Michigan State University Libraries was developed and…

  3. Starting Over: Current Issues in Online Catalog User Interface Design.

    ERIC Educational Resources Information Center

    Crawford, Walt

    1992-01-01

    Discussion of online catalogs focuses on issues in interface design. Issues addressed include understanding the user base; common user access (CUA) with personal computers; common command language (CCL); hyperlinks; screen design issues; differences from card catalogs; indexes; graphic user interfaces (GUIs); color; online help; and remote users.…

  4. A Modern Update and Usage of Historical Variable Star Catalogs

    NASA Astrophysics Data System (ADS)

    Pagnotta, Ashley; Graur, Or; Murray, Zachary; Kruk, Julia; Christie-Dervaux, Lucien; Chen, Dong Yi

    2015-01-01

    One of the earliest modern variable star catalogs was constructed by Henrietta Swan Leavitt during her tenure at the Harvard College Observatory (HCO) in the early 1900s. Originally published in 1908, Leavitt's catalog listed 1777 variables in the Magellanic Clouds (MCs). The construction and analysis of this catalog allowed her to subsequently discover the Cepheid period-luminosity relationship, now known as the Leavitt Law. The MC variable star catalogs were updated and expanded by Cecilia Payne-Gaposchkin in 1966 and 1971. Although newer studies of the MC variables have been performed since then, the new information has not always been correlated with the old due to a lack of modern descriptors of the stars listed in the Harvard MC catalogs. We will discuss the history of MC variable star catalogs, especially those compiled using the HCO plates, as well as our modernized version of the Leavitt and Payne-Gaposchkin catalogs. Our modern catalog can be used in conjunction with the archival plates (primarily via the Digital Access to a Sky Century @ Harvard scanning project) to study the secular behavior of the MC variable stars over the past century.

  5. In Celebration: The National Union Catalog, Pre-1956 Imprints.

    ERIC Educational Resources Information Center

    Cole, John Y., Ed.

    This document contains the principal papers from a 1981 symposium held to celebrate the completion of the 754-volume National Union Catalog, Pre-1956 Imprints. Papers by both those who use the National Union Catalog (NUC) and those who developed it are included. A brief preface describes the mission of the Center for the Book and the purpose of…

  6. CERL PLATO Lesson Catalog: Curricular and Utility Programs.

    ERIC Educational Resources Information Center

    Lyman, Elisabeth R.; Postlewait, Deborah S.

    This comprehensive catalog of available instructional materials for use with the PLATO system lists completed lessons which have been used in actual instructional situations or have had adequate testing to ensure that the files are in working order. Printed directly from the CERL online catalog, "uicat," the information provided for each…

  7. Psychology Teaching Resources in the MERLOT Digital Learning Objects Catalog

    ERIC Educational Resources Information Center

    Brinthaupt, Thomas M.; Pilati, Michelle L.; King, Beverly R.

    2008-01-01

    MERLOT (Multimedia Educational Resource for Learning and Online Teaching) is a free multidisciplinary catalog of digital learning materials, peer reviews, learning assignments, and member comments designed to facilitate faculty instruction. The catalog's goal is to expand the quantity and quality of peer-reviewed online teaching materials. We…

  8. The library as a reference tool: online catalogs

    USGS Publications Warehouse

    Stark, M.

    1991-01-01

    Online catalogs are computerized listings of materials in a particular library or group of libraries. General characteristics of online catalogs include ability for searching interactively and for locating descriptions of books, maps, and reports on regional or topical geology. Suggestions for searching, evaluating results, modifying searches, and limitations of searching are presented. -Author

  9. Popular Names of U.S. Government Reports. A Catalog.

    ERIC Educational Resources Information Center

    Bernier, Bernard A., Comp.; And Others

    Although many government publications become known by popular names, they are usually indexed under institutional names. This catalog lists government reports alphabetically by popular names. Most entries have the Library of Congress record as a bibliographic description. This third edition of the catalog is the first to include citations to the…

  10. Streamlining Maintenance and Access to a University's Academic Catalog

    ERIC Educational Resources Information Center

    Benjamin, Blair

    2005-01-01

    Developing and maintaining an online version of a University's Academic Catalog has increasingly become a priority for enrollment management and IT staff. Many schools are now using the online version of their catalog as their primary working copy and are generating their print version periodically as needed. Managing and accessing this content…

  11. Multisensory Public Access Catalogs on CD-ROM.

    ERIC Educational Resources Information Center

    Harrison, Nancy; Murphy, Brower

    1987-01-01

    BiblioFile Intelligent Catalog is a CD-ROM-based public access catalog system which incorporates graphics and sound to provide a multisensory interface and artificial intelligence techniques to increase search precision. The system can be updated frequently and inexpensively by linking hard disk drives to CD-ROM optical drives. (MES)

  12. Cataloging Manual for Nonbook Materials. RS 85-7795.

    ERIC Educational Resources Information Center

    Hawaii State Dept. of Education, Honolulu. Office of Instructional Services.

    This revised edition of the cataloging manual for nonbook materials is to be used by school librarians as a resource in developing and maintaining an expanding collection of nonbook materials. Entries in the document are based on the second edition of "Anglo-American Cataloging Rules" (AACR2), and on "Guidelines for Using AACR2…

  13. 16 CFR 305.20 - Paper catalogs and websites.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... labeler who advertises in a catalog, a covered product (except ceiling fan, fluorescent lamp ballasts... efficiency or thermal efficiency ratings for pool heaters, central air conditioners, heat pumps, and furnaces..., retailer, or private labeler who advertises a covered product that is a ceiling fan in a catalog,...

  14. 16 CFR 305.20 - Paper catalogs and websites.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... labeler who advertises in a catalog, a covered product (except ceiling fan, fluorescent lamp ballasts... efficiency or thermal efficiency ratings for pool heaters, central air conditioners, heat pumps, and furnaces..., retailer, or private labeler who advertises a covered product that is a ceiling fan in a catalog,...

  15. Catalog of Programmed Instructional Material. (Including Change I).

    ERIC Educational Resources Information Center

    Bureau of Naval Personnel, Washington, DC.

    A catalog lists programed instruction material for military tasks that has been developed by the U.S. Navy. Part one of the catalog lists programed material alphabetically by subject area. Information provided for each program includes title, classification, identification code to be used when requesting copies of the program, population for whom…

  16. A Catalog of the World Xylomyidae (Insecta: Diptera)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The world fauna of Xylomyidae is cataloged, which includes 4 valid genera and 132 species. A phylogenetic analysis is presented which is then formalized in a classification of the family that is used to arrange the catalog. Full taxonomic citations, synonymy and geographic distribution data are pr...

  17. 41 CFR 101-30.101-7 - Federal Catalog System.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 41 Public Contracts and Property Management 2 2010-07-01 2010-07-01 true Federal Catalog System. 101-30.101-7 Section 101-30.101-7 Public Contracts and Property Management Federal Property Management Regulations System FEDERAL PROPERTY MANAGEMENT REGULATIONS SUPPLY AND PROCUREMENT 30-FEDERAL CATALOG SYSTEM...

  18. Cataloging, Processing, Administering AV Materials. A Model for Wisconsin Schools.

    ERIC Educational Resources Information Center

    Little, Robert D., Ed.

    The objective of this cataloging manual is to recommend specific methods for cataloging audiovisual materials for use in individual school media centers. The following types of audiovisual aids are included: educational games, filmstrips, flat graphics, kits, models, motion pictures, realia, records, slides, sound filmstrips, tapes,…

  19. Creating Automated Bibliographies Using Internet-Accessible Online Library Catalogs.

    ERIC Educational Resources Information Center

    Brown, Christopher C.

    1994-01-01

    Discusses online library catalogs that are accessible via the Internet and describes their use to create bibliographies using EndNote software. Three catalogs are described that need no further editing; two are described that need some editing; examples of records are given; and the systems are compared. (LRW)

  20. 16 CFR 305.20 - Paper catalogs and websites.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 16 Commercial Practices 1 2010-01-01 2010-01-01 false Paper catalogs and websites. 305.20 Section 305.20 Commercial Practices FEDERAL TRADE COMMISSION REGULATIONS UNDER SPECIFIC ACTS OF CONGRESS RULE... Disclosures § 305.20 Paper catalogs and websites. (a) Any manufacturer, distributor, retailer, or...

  1. VizieR Online Data Catalog: The Washington Visual Double Star Catalog (Mason+ 2001-2013)

    NASA Astrophysics Data System (ADS)

    Mason, B. D.; Wycoff, G. L.; Hartkopf, W. I.; Douglass, G. G.; Worley, C. E.

    2013-11-01

    The Washington Visual Double Star Catalog (WDS) is the successor to the Index Catalogue of Visual Double Stars, 1961.0 (IDS; Jeffers and van den Bos, Publ. Lick Obs. 21). Three earlier double star catalogs in XXth century, those by Burnham (BDS, 1906, "General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), Innes (SDS, 1927, "Southern Double Star Catalogue -19 to -90 degrees", Union Observatory, Johannesburg, South Africa), and Aitken (ADS, 1932 "New General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), each covered only a portion of the sky. Both the IDS and the WDS cover the entire sky, and the WDS is intended to contain all known visual double stars for which at least one differential measure has been published. The WDS is continually updated as published data become available. Prior to this, three major updates have been published (Worley and Douglass 1984, "Washington Visual Double Star Catalog, 1984.0", U.S. Naval Observatory, Washington; Worley and Douglass 1997A&AS..125..523W, Cat. I/237; Mason, Wycoff, Hartkopf, Douglass and Worley 2001AJ....122.3466M; and Mason et al. 2006.5). The Washington Double Star Catalog (WDS) has seen numerous changes since the last major release of the catalog. The application of many techniques and considerable industry over the past few years has yielded significant gains in both the number of systems and the number of measures. Is is maintained by the US Naval Observatory, and represents the world's principal database of astrometric double and multiple star information. The WDS contains positions (J2000), discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions, and, when available, Durchmusterung numbers and notes for the components of the systems. (3 data files).

  2. VizieR Online Data Catalog: The Washington Visual Double Star Catalog (Mason+ 2001-2012)

    NASA Astrophysics Data System (ADS)

    Mason, B. D.; Wycoff, G. L.; Hartkopf, W. I.; Douglass, G. G.; Worley, C. E.

    2012-11-01

    The Washington Visual Double Star Catalog (WDS) is the successor to the Index Catalogue of Visual Double Stars, 1961.0 (IDS; Jeffers and van den Bos, Publ. Lick Obs. 21). Three earlier double star catalogs in XXth century, those by Burnham (BDS, 1906, "General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), Innes (SDS, 1927, "Southern Double Star Catalogue -19 to -90 degrees", Union Observatory, Johannesburg, South Africa), and Aitken (ADS, 1932 "New General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), each covered only a portion of the sky. Both the IDS and the WDS cover the entire sky, and the WDS is intended to contain all known visual double stars for which at least one differential measure has been published. The WDS is continually updated as published data become available. Prior to this, three major updates have been published (Worley and Douglass 1984, "Washington Visual Double Star Catalog, 1984.0", U.S. Naval Observatory, Washington; Worley and Douglass 1997A&AS..125..523W, Cat. I/237; Mason, Wycoff, Hartkopf, Douglass and Worley 2001AJ....122.3466M; and Mason et al. 2006.5). The Washington Double Star Catalog (WDS) has seen numerous changes since the last major release of the catalog. The application of many techniques and considerable industry over the past few years has yielded significant gains in both the number of systems and the number of measures. Is is maintained by the US Naval Observatory, and represents the world's principal database of astrometric double and multiple star information. The WDS contains positions (J2000), discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions, and, when available, Durchmusterung numbers and notes for the components of the systems. (3 data files).

  3. VizieR Online Data Catalog: Hubble Source Catalog (V1 and V2) (Whitmore+, 2016)

    NASA Astrophysics Data System (ADS)

    Whitmore, B. C.; Allam, S. S.; Budavari, T.; Casertano, S.; Downes, R. A.; Donaldson, T.; Fall, S. M.; Lubow, S. H.; Quick, L.; Strolger, L.-G.; Wallace, G.; White, R. L.

    2016-10-01

    The HSC v1 contains members of the WFPC2, ACS/WFC, WFC3/UVIS and WFC3/IR Source Extractor source lists from HLA version DR8 (data release 8). The crossmatching process involves adjusting the relative astrometry of overlapping images so as to minimize positional offsets between closely aligned sources in different images. After correction, the astrometric residuals of crossmatched sources are significantly reduced, to typically less than 10mas. The relative astrometry is supported by using Pan-STARRS, SDSS, and 2MASS as the astrometric backbone for initial corrections. In addition, the catalog includes source nondetections. The crossmatching algorithms and the properties of the initial (Beta 0.1) catalog are described in Budavari & Lubow (2012ApJ...761..188B). The HSC v2 contains members of the WFPC2, ACS/WFC, WFC3/UVIS and WFC3/IR Source Extractor source lists from HLA version DR9.1 (data release 9.1). The crossmatching process involves adjusting the relative astrometry of overlapping images so as to minimize positional offsets between closely aligned sources in different images. After correction, the astrometric residuals of crossmatched sources are significantly reduced, to typically less than 10mas. The relative astrometry is supported by using Pan-STARRS, SDSS, and 2MASS as the astrometric backbone for initial corrections. In addition, the catalog includes source nondetections. The crossmatching algorithms and the properties of the initial (Beta 0.1) catalog are described in Budavari & Lubow (2012ApJ...761..188B). Hubble Source Catalog Acknowledgement: Based on observations made with the NASA/ESA Hubble Space Telescope, and obtained from the Hubble Legacy Archive, which is a collaboration between the Space Telescope Science Institute (STScI/NASA), the Space Telescope European Coordinating Facility (ST-ECF/ESAC/ESA) and the Canadian Astronomy Data Centre (CADC/NRC/CSA). (2 data files).

  4. C 3, A Command-line Catalog Cross-match Tool for Large Astrophysical Catalogs

    NASA Astrophysics Data System (ADS)

    Riccio, Giuseppe; Brescia, Massimo; Cavuoti, Stefano; Mercurio, Amata; di Giorgio, Anna Maria; Molinari, Sergio

    2017-02-01

    Modern Astrophysics is based on multi-wavelength data organized into large and heterogeneous catalogs. Hence, the need for efficient, reliable and scalable catalog cross-matching methods plays a crucial role in the era of the petabyte scale. Furthermore, multi-band data have often very different angular resolution, requiring the highest generality of cross-matching features, mainly in terms of region shape and resolution. In this work we present C 3 (Command-line Catalog Cross-match), a multi-platform application designed to efficiently cross-match massive catalogs. It is based on a multi-core parallel processing paradigm and conceived to be executed as a stand-alone command-line process or integrated within any generic data reduction/analysis pipeline, providing the maximum flexibility to the end-user, in terms of portability, parameter configuration, catalog formats, angular resolution, region shapes, coordinate units and cross-matching types. Using real data, extracted from public surveys, we discuss the cross-matching capabilities and computing time efficiency also through a direct comparison with some publicly available tools, chosen among the most used within the community, and representative of different interface paradigms. We verified that the C 3 tool has excellent capabilities to perform an efficient and reliable cross-matching between large data sets. Although the elliptical cross-match and the parametric handling of angular orientation and offset are known concepts in the astrophysical context, their availability in the presented command-line tool makes C 3 competitive in the context of public astronomical tools.

  5. VizieR Online Data Catalog: SLoWPoKES-II catalog (Dhital+, 2015)

    NASA Astrophysics Data System (ADS)

    Dhital, S.; West, A. A.; Stassun, K. G.; Schluns, K. J.; Massey, A. P.

    2015-11-01

    We have identified the Sloan Low-mass Wide Pairs of Kinematically Equivalent Systems (SLoWPoKES)-II catalog of 105537 wide, low-mass binaries without using proper motions. We extend the SLoWPoKES catalog (Paper I; Dhital et al. 2010, cat. J/AJ/139/2566) by identifying binary systems with angular separations of 1-20'' based entirely on SDSS photometry and astrometry. As in Paper I, we used the Catalog Archive Server query tool (CasJobs6; http://skyserver.sdss3.org/CasJobs/) to select the sample of low-mass stars from the SDSS-DR8 star table as having r-i>=0.3 and i-z>=0.2, consistent with spectral types of K5 or later. Following Paper I (Dhital et al. 2010, cat. J/AJ/139/2566) we classified candidate pairs with a probability of chance alignment Pf{<=}0.05 as real binaries. We note that this limit does not have any physical motivation but was chosen to minimize the number of spurious pairs. This cut results in 105537 M dwarf (dM)+MS (see Table3), 78 white dwarf (WD)+dM (see Table5), and 184 sdM+sdM (see Table6) binary systems with separations of 1-20''. Of the dM+MS binaries, 44 are very low-mass (VLM) binary candidates (see Table4), with colors redder than the median M7 dwarf for both components. This represents a significant increase over the SLoWPoKES catalog of 1342 common proper motion (CPM) binaries that we presented in Paper I (Dhital et al. 2010, cat. J/AJ/139/2566). The SLoWPoKES and SLoWPoKES-II catalogs are available on the Filtergraph portal (http://slowpokes.vanderbilt.edu/). (4 data files).

  6. VizieR Online Data Catalog: The Washington Visual Double Star Catalog (Mason+ 2001-2014)

    NASA Astrophysics Data System (ADS)

    Mason, B. D.; Wycoff, G. L.; Hartkopf, W. I.; Douglass, G. G.; Worley, C. E.

    2014-11-01

    The Washington Visual Double Star Catalog (WDS) is the successor to the Index Catalogue of Visual Double Stars, 1961.0 (IDS; Jeffers and van den Bos, Publ. Lick Obs. 21). Three earlier double star catalogs in XXth century, those by Burnham (BDS, 1906, "General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), Innes (SDS, 1927, "Southern Double Star Catalogue -19 to -90 degrees", Union Observatory, Johannesburg, South Africa), and Aitken (ADS, 1932 "New General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), each covered only a portion of the sky. Both the IDS and the WDS cover the entire sky, and the WDS is intended to contain all known visual double stars for which at least one differential measure has been published. The WDS is continually updated as published data become available. Prior to this, three major updates have been published (Worley and Douglass 1984, "Washington Visual Double Star Catalog, 1984.0", U.S. Naval Observatory, Washington; Worley and Douglass 1997A&AS..125..523W, Cat. I/237; Mason, Wycoff, Hartkopf, Douglass and Worley 2001AJ....122.3466M; and Mason et al. 2006.5). The Washington Double Star Catalog (WDS) has seen numerous changes since the last major release of the catalog. The application of many techniques and considerable industry over the past few years has yielded significant gains in both the number of systems and the number of measures. Is is maintained by the US Naval Observatory, and represents the world's principal database of astrometric double and multiple star information. The WDS contains positions (J2000), discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions, and, when available, Durchmusterung numbers and notes for the components of the systems. (3 data files).

  7. VizieR Online Data Catalog: The Washington Visual Double Star Catalog (Mason+ 2001-2014)

    NASA Astrophysics Data System (ADS)

    Mason, B. D.; Wycoff, G. L.; Hartkopf, W. I.; Douglass, G. G.; Worley, C. E.

    2015-11-01

    The Washington Visual Double Star Catalog (WDS) is the successor to the Index Catalogue of Visual Double Stars, 1961.0 (IDS; Jeffers and van den Bos, Publ. Lick Obs. 21). Three earlier double star catalogs in XXth century, those by Burnham (BDS, 1906, "General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), Innes (SDS, 1927, "Southern Double Star Catalogue -19 to -90 degrees", Union Observatory, Johannesburg, South Africa), and Aitken (ADS, 1932 "New General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), each covered only a portion of the sky. Both the IDS and the WDS cover the entire sky, and the WDS is intended to contain all known visual double stars for which at least one differential measure has been published. The WDS is continually updated as published data become available. Prior to this, three major updates have been published (Worley and Douglass 1984, "Washington Visual Double Star Catalog, 1984.0", U.S. Naval Observatory, Washington; Worley and Douglass 1997A&AS..125..523W, Cat. I/237; Mason, Wycoff, Hartkopf, Douglass and Worley 2001AJ....122.3466M; and Mason et al. 2006.5). The Washington Double Star Catalog (WDS) has seen numerous changes since the last major release of the catalog. The application of many techniques and considerable industry over the past few years has yielded significant gains in both the number of systems and the number of measures. Is is maintained by the US Naval Observatory, and represents the world's principal database of astrometric double and multiple star information. The WDS contains positions (J2000), discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions, and, when available, Durchmusterung numbers and notes for the components of the systems. (3 data files).

  8. VizieR Online Data Catalog: The Washington Visual Double Star Catalog (Mason+ 2001-2014)

    NASA Astrophysics Data System (ADS)

    Mason, B. D.; Wycoff, G. L.; Hartkopf, W. I.; Douglass, G. G.; Worley, C. E.

    2017-03-01

    The Washington Visual Double Star Catalog (WDS) is the successor to the Index Catalogue of Visual Double Stars, 1961.0 (IDS; Jeffers and van den Bos, Publ. Lick Obs. 21). Three earlier double star catalogs in XXth century, those by Burnham (BDS, 1906, "General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), Innes (SDS, 1927, "Southern Double Star Catalogue -19 to -90 degrees", Union Observatory, Johannesburg, South Africa), and Aitken (ADS, 1932 "New General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), each covered only a portion of the sky. Both the IDS and the WDS cover the entire sky, and the WDS is intended to contain all known visual double stars for which at least one differential measure has been published. The WDS is continually updated as published data become available. Prior to this, three major updates have been published (Worley and Douglass 1984, "Washington Visual Double Star Catalog, 1984.0", U.S. Naval Observatory, Washington; Worley and Douglass 1997A&AS..125..523W, Cat. I/237; Mason, Wycoff, Hartkopf, Douglass and Worley 2001AJ....122.3466M; and Mason et al. 2006.5). The Washington Double Star Catalog (WDS) has seen numerous changes since the last major release of the catalog. The application of many techniques and considerable industry over the past few years has yielded significant gains in both the number of systems and the number of measures. Is is maintained by the US Naval Observatory, and represents the world's principal database of astrometric double and multiple star information. The WDS contains positions (J2000), discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions, and, when available, Durchmusterung numbers and notes for the components of the systems. (3 data files).

  9. VizieR Online Data Catalog: The Washington Visual Double Star Catalog (Mason+ 2001-2014)

    NASA Astrophysics Data System (ADS)

    Mason, B. D.; Wycoff, G. L.; Hartkopf, W. I.; Douglass, G. G.; Worley, C. E.

    2016-11-01

    The Washington Visual Double Star Catalog (WDS) is the successor to the Index Catalogue of Visual Double Stars, 1961.0 (IDS; Jeffers and van den Bos, Publ. Lick Obs. 21). Three earlier double star catalogs in XXth century, those by Burnham (BDS, 1906, "General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), Innes (SDS, 1927, "Southern Double Star Catalogue -19 to -90 degrees", Union Observatory, Johannesburg, South Africa), and Aitken (ADS, 1932 "New General Catalogue of Double Stars within 121 degrees of the North Pole", Carnegie Institution of Washington), each covered only a portion of the sky. Both the IDS and the WDS cover the entire sky, and the WDS is intended to contain all known visual double stars for which at least one differential measure has been published. The WDS is continually updated as published data become available. Prior to this, three major updates have been published (Worley and Douglass 1984, "Washington Visual Double Star Catalog, 1984.0", U.S. Naval Observatory, Washington; Worley and Douglass 1997A&AS..125..523W, Cat. I/237; Mason, Wycoff, Hartkopf, Douglass and Worley 2001AJ....122.3466M; and Mason et al. 2006.5). The Washington Double Star Catalog (WDS) has seen numerous changes since the last major release of the catalog. The application of many techniques and considerable industry over the past few years has yielded significant gains in both the number of systems and the number of measures. Is is maintained by the US Naval Observatory, and represents the world's principal database of astrometric double and multiple star information. The WDS contains positions (J2000), discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions, and, when available, Durchmusterung numbers and notes for the components of the systems. (3 data files).

  10. Catalog of risks extended and updated

    SciTech Connect

    Cohen, B.L. . Dept. of Physics and Astronomy)

    1991-09-01

    A large variety of risks are quantified in terms of the loss of life expectancy they cause in the United States. Risks considered include the following: diseases; accidents of various types at home, at work, in public, and in motor vehicles; unemployment; poor social connections; use of small cars; smoking; air pollution; other environmental pollutants leading to cancer and non-cancer effects; purposely ingested substances; sports participation; geography; medical care; epidemics; natural hazards; socioeconomic factors; Rn and other radiation; and energy conservation. A few suggestions for applications of this catalog of risks are offered.

  11. The orientation of galaxies and of clusters from an objectively defined catalogue

    NASA Astrophysics Data System (ADS)

    Fong, R.; Stevenson, P. R. F.; Shanks, T.

    1990-01-01

    The galaxy and cluster catalogs of Stevenson et al. (1988) are used to study the orientations of clusters and galaxies within clusters. Results are presented from statistical tests on the orientation distribution of galaxies and clusters. Consideration is given to the possibility that a cluster's major axis extends beyond the central region from which the axis is determined. The results do not confirm Bignelli's (1982) hypothesis that clusters point towards the nearest neighbor cluster. Also, the suggestion of Argyres et al. (1986) that major axes of clusters extend to scale of about 15/h Mpc is not confirmed. It is shown that for clusters within separations less than 34 arcmin, neighboring clusters may tend to align with each other.

  12. Explanation of temporal clustering of tsunami sources using the epidemic-type aftershock sequence model

    USGS Publications Warehouse

    Geist, Eric L.

    2014-01-01

    Temporal clustering of tsunami sources is examined in terms of a branching process model. It previously was observed that there are more short interevent times between consecutive tsunami sources than expected from a stationary Poisson process. The epidemic‐type aftershock sequence (ETAS) branching process model is fitted to tsunami catalog events, using the earthquake magnitude of the causative event from the Centennial and Global Centroid Moment Tensor (CMT) catalogs and tsunami sizes above a completeness level as a mark to indicate that a tsunami was generated. The ETAS parameters are estimated using the maximum‐likelihood method. The interevent distribution associated with the ETAS model provides a better fit to the data than the Poisson model or other temporal clustering models. When tsunamigenic conditions (magnitude threshold, submarine location, dip‐slip mechanism) are applied to the Global CMT catalog, ETAS parameters are obtained that are consistent with those estimated from the tsunami catalog. In particular, the dip‐slip condition appears to result in a near zero magnitude effect for triggered tsunami sources. The overall consistency between results from the tsunami catalog and that from the earthquake catalog under tsunamigenic conditions indicates that ETAS models based on seismicity can provide the structure for understanding patterns of tsunami source occurrence. The fractional rate of triggered tsunami sources on a global basis is approximately 14%.

  13. The 2MASS-selected Flat Galaxy Catalog

    NASA Astrophysics Data System (ADS)

    Mitronova, S. N.; Karachentsev, I. D.; Karachentseva, V. E.; Jarrett, T. H.; Kudrya, Yu. N.

    An all-sky catalog of 18020 disc-like galaxies is presented. The galaxies are selected from the Extended Source Catalog of the Two Micron All-Sky Survey (XSC 2MASS) basing on their 2MASS axial ratio a/b ≥ 3. The Catalog contains data on magnitudes of a galaxy in the J, H, KS bands, its axial ratio, positional angle, index of luminosity concentration, as well as identification of the galaxy with the LEDA and the NED databases. Unlike the available optical catalogs, the new 2MFGC catalog seems to be more suitable to study cosmic streaming on a scale of z <~ 0.1. The dipole moment of distribution of the bright (K < 11m) 2MFGC objects (l = 227°, b = 41° or SGL = 90°, SGB = -43°) lies within statistical errors (±15°) in the direction of the IRAS dipole and the optical RFGC dipole.

  14. AUTOMATIC CLASSIFICATION OF VARIABLE STARS IN CATALOGS WITH MISSING DATA

    SciTech Connect

    Pichara, Karim; Protopapas, Pavlos

    2013-11-10

    We present an automatic classification method for astronomical catalogs with missing data. We use Bayesian networks and a probabilistic graphical model that allows us to perform inference to predict missing values given observed data and dependency relationships between variables. To learn a Bayesian network from incomplete data, we use an iterative algorithm that utilizes sampling methods and expectation maximization to estimate the distributions and probabilistic dependencies of variables from data with missing values. To test our model, we use three catalogs with missing data (SAGE, Two Micron All Sky Survey, and UBVI) and one complete catalog (MACHO). We examine how classification accuracy changes when information from missing data catalogs is included, how our method compares to traditional missing data approaches, and at what computational cost. Integrating these catalogs with missing data, we find that classification of variable objects improves by a few percent and by 15% for quasar detection while keeping the computational cost the same.

  15. Beyond Day 1: The Future of the Catalog. Papers Presented at a Cataloging Committee Program, June 7, 1978.

    ERIC Educational Resources Information Center

    Boston Library Consortium, MA.

    These papers presented at a program by the Boston Library Consortium Cataloging Committee had three objectives: to present basic non-technical information on the implications for member libraries of the decision by the Library of Congress to close its catalog and to adopt AACR2; to emphasize the need to make decisions in the next two years on card…

  16. The Many Faces of a Catalog Record: A Snapshot of Bibliographic Display Practices for Monographs in Online Catalogs.

    ERIC Educational Resources Information Center

    Wool, Gregory

    1996-01-01

    Full displays of bibliographic records for 5 monographs were analyzed in 36 library online catalogs and compared with International Standard Bibliographic Description (ISBD) and traditional catalog-card displays. Sampled characteristics included completeness, visual layout, data sequence, label specificity, and integration of description and…

  17. Angular cross-relations of Abell clusters in different distance classes

    NASA Technical Reports Server (NTRS)

    Szalay, A. S.; Hollosi, J.; Toth, G.

    1989-01-01

    The angular autocorrelation and cross-correlation functions of the D = 1 ... 4, D = 5, and D = 6 distance class Abell clusters are estimated. There is a strong anticorrelation between the most distant D = 6 and the closest D = 1 ... 4 subsamples. It is suggested that an artifact of the cluster identification process presumably due to the finite angular size of the cluster. This anticorrelation seems to contradict some recent estimations of projection contaminations in the Abell catalog. The angular proximity of a foreground cluster may have caused a background cluster not to be counted as it was thought to be a subcluster or it was erroneously assigned to a nearer distance class.

  18. Rate-dependent incompleteness of earthquake catalogs

    NASA Astrophysics Data System (ADS)

    Hainzl, Sebastian

    2016-04-01

    Important information about the earthquake generation process can be gained from instrumental earthquake catalogs, but this requires complete recordings to avoid biased results. The local completeness magnitude Mc is known to depend on general conditions such as the seismographic network and the environmental noise, which generally limit the possibility to detect small events. The detectability can be additionally reduced by an earthquake-induced increase of the noise-level leading to short-term variations of Mc, which cannot be resolved by traditional methods relying on the analysis of the frequency-magnitude distribution. Based on simple assumptions, I propose a new method to estimate such temporal excursions of Mc solely based on the estimation of the earthquake rate resulting in a high temporal resolution of Mc. The approach is shown to be in agreement with the apparent decrease of the estimated Gutenberg-Richter b-value in high-activity phases of recorded data sets and the observed incompleteness periods after mainshocks. Furthermore, an algorithm to estimate temporal changes of Mc is introduced and applied to empirical aftershock and swarm sequences from California and central Europe, indicating that observed b-value fluctuations are often related to rate-dependent incompleteness of the earthquake catalogs.

  19. Version 1 of the Hubble Source Catalog

    NASA Astrophysics Data System (ADS)

    Whitmore, Bradley C.; Allam, Sahar S.; Budavari, Tamas; Donaldson, Tom; Lubow, Stephen H.; Quick, Lee; Strolger, Louis-Gregory; Wallace, Geoff; White, Richard L.

    2015-01-01

    The Hubble Source Catalog (HSC) is an initiative to combine the tens of thousands of visit-based Hubble Legacy Archive (HLA - available at http://hla.stsci.edu) source lists into a single master catalog. The HSC currently includes ACS/WFC, WFPC2, and WFC3 source lists generated using the Source Extractor software (Bertin & Arnouts 1996), cross-matched using the technique described in Budavari & Lubow (2012). The astrometric residuals for the HSC individual objects are typically within 10 mas and the magnitude residuals between repeats are generally within 0.10 mag. Version 1 of the HSC is scheduled to be released in winter 2015. Some of the primary improvements over the current Beta 0.3 version of the HSC include: 1) improved WFC3 source lists, 2) two more years of WFC3 data, 3) improved matching algorithms, 4) a draft paper to be submitted to PASP, 5) inclusion in the MAST Discovery Portal (http://mast.stsci.edu), and 6) a CasJobs capability for advanced searches. Demonstrations will be provided at the Space Telescope Science Institute booth during the conference and people will have the opportunity to use the system interactively. The URL for the HSC is http://archive.stsci.edu/hst/hsc/ .

  20. Recent developments of the Middle East catalog

    NASA Astrophysics Data System (ADS)

    Zare, Mehdi; Amini, Hamideh; Yazdi, Pouye; Sesetyan, Karin; Demircioglu, Mine Betul; Kalafat, Dogan; Erdik, Mustafa; Giardini, Domenico; Khan, M. Asif; Tsereteli, Nino

    2014-10-01

    This article summarizes a recent study in the framework of the Global Earth model (GEM) and the Earthquake Model of the Middle East (EMME) project to establish the new catalog of seismicity for the Middle East, using all historical (pre-1900), early and modern instrumental events up to 2006. According to different seismicity, which depends on geophysical, geological, tectonic, and seismicity data, this region is subdivided to nine subregions, consisting of Alborz-Azerbaijan, Afghanistan-Pakistan, Saudi Arabia, Caucasus, Central Iran, Kopeh-Dagh, Makran, Zagros, and Turkey (Eastern Anatolia; after 30° E). After omitting the duplicate events, aftershocks, and foreshocks by using the Gruenthal method, and uniform all magnitude to Mw scale, 28,244 main events remain for the new catalog of Middle East from 1250 B.C. through 2006. The magnitude of completeness ( Mc) was determined as 4.9 for five out of nine subregions, where the least values of Mc were found to be 4.2. The threshold of Mc is around 5.5, 5.0, 4.5, and 4.0, for the time after 1950, 1963, 1975, and 2000, respectively. The average of teleseismic depths in all regions is less than 15 km. Totally, majority of depth for Kopeh-Dagh and Central Iran, Zagros, and Alborz-Azerbaijan, approximately, is 15, 13, and 11 km and for Afghanistan-Pakistan, Caucasus, Makran, Turkey (after 30° E), and Saudi Arabia is about 9 km.

  1. GRB Catalog: Bursts from Vela to Swift

    NASA Technical Reports Server (NTRS)

    Angelini, L.

    2008-01-01

    Gamma ray burst (GRB) astronomy started when the first event was recorded on July 2, 1967 by Vela 4a and 4b. Since then many missions have flown experiments capable of detecting GRBs. The events collected by these older experiments are mostly available in paper copy, each containing a few ten to a few hundred bursts. No systematic effort in cataloging of these bursts has been available. In some cases the information is unpublished and in others difficult to retrieve. The first major GRB catalog was obtained by GRO with the BATSE experiment. It contains more than 2000 bursts and includes homogeneous information for each of the bursts. With the launch of Swift, the first Gamma-ray/X-ray mission dedicated to the study of GRBs and their afterglows, a wealth of information is collected by the Swift instrument as well as from ground-based telescopes. This talk will describe the efforts to create a comprehensive GRBCAT and its current status and future prospective.

  2. The Chandra Source Catalog : Google Earth Interface

    NASA Astrophysics Data System (ADS)

    Glotfelty, Kenny; McLaughlin, W.; Evans, I.; Evans, J.; Anderson, C. S.; Bonaventura, N. R.; Davis, J. E.; Doe, S. M.; Fabbiano, G.; Galle, E. C.; Gibbs, D. G., II; Grier, J. D.; Hain, R.; Hall, D. M.; Harbo, P. N.; He, H.; Houck, J. C.; Karovska, M.; Kashyap, V. L.; Lauer, J.; McCollough, M. L.; McDowell, J. C.; Miller, J. B.; Mitschang, A. W.; Morgan, D. L.; Mossman, A. E.; Nichols, J. S.; Nowak, M. A.; Plummer, D. A.; Primini, F. A.; Refsdal, B. L.; Rots, A. R.; Siemiginowska, A. L.; Sundheim, B. A.; Tibbetts, M. S.; van Stone, D. W.; Winkelman, S. L.; Zografou, P.

    2009-09-01

    The Chandra Source Catalog (CSC) contains multi-resolution, exposure corrected, background subtracted, full-field images that are stored as individual FITS files and as three-color JPEG files. In this poster we discuss how we took these data and were able to, with relatively minimal effort, convert them for use with the Google Earth application in its ``Sky'' mode. We will highlight some of the challenges which include converting the data to the required Mercator projection, reworking the 3-color algorithm for pipeline processing, and ways to reduce the data volume through re-binning, using color-maps, and special Keyhole Markup Language (kml) tags to only load images on-demand. The result is a collection of some 11,000 3-color images that are available for all the individual observation in the CSC Release 1. We also have made available all ˜4000 Field-of-View outlines (with per-chip regions), which turns out are trivial to produce starting with a simple dmlist command. In the first week of release, approximately 40% of the images have been accessed at least once through some 50,000 individual web hits which have served over 4Gb of data to roughly 750 users in 60+ countries. We will also highlight some future directions we are exploring, including real-time catalog access to individual source properties and eventual access to file based products such as FITS images, spectra, and light-curves.

  3. Detecting galaxy clusters in the DLS and CARS: a Bayesian cluster finder

    NASA Astrophysics Data System (ADS)

    Ascaso, B.; Wittman, D.; Benítez, N.

    2011-11-01

    The detection of galaxy clusters in present and future surveys enables measuring mass-to-light ratios, clustering properties or galaxy cluster abundances and therefore, constraining cosmological parameters. We present a new technique for detecting galaxy clusters, which is based on the Matched Filter Algorithm from a Bayesian point of view. The method is able to determine the position, redshift and richness of the cluster through the maximization of a filter depending on galaxy luminosity, density and photometric redshift combined with a galaxy cluster prior. We tested the algorithm through realistic mock galaxy catalogs, revealing that the detections are 100% complete and 80% pure for clusters up to z < 1.2 and richer than λ ≥ 25 (Abell richness ≥ 0). We applied the algorithm to the CFHTLS Archive Research Survey (CARS) data, recovering similar detections as previously published using the same data plus additional clusters that are very probably real. We also applied this algorithm to the Deep Lens Survey (DLS), obtaining the first sample of optical-selected galaxy in this survey. The sample is complete up to redshift 0.7 and we detect more than 780 cluster candidates up to redshift 1.2. We conclude by discussing the differences between previous weak lensing detections in this survey and optical detections in both samples.

  4. The COSMOS2015 Catalog: Exploring the 1 < z < 6 Universe with Half a Million Galaxies

    NASA Astrophysics Data System (ADS)

    Laigle, C.; McCracken, H. J.; Ilbert, O.; Hsieh, B. C.; Davidzon, I.; Capak, P.; Hasinger, G.; Silverman, J. D.; Pichon, C.; Coupon, J.; Aussel, H.; Le Borgne, D.; Caputi, K.; Cassata, P.; Chang, Y.-Y.; Civano, F.; Dunlop, J.; Fynbo, J.; Kartaltepe, J. S.; Koekemoer, A.; Le Fèvre, O.; Le Floc'h, E.; Leauthaud, A.; Lilly, S.; Lin, L.; Marchesi, S.; Milvang-Jensen, B.; Salvato, M.; Sanders, D. B.; Scoville, N.; Smolcic, V.; Stockmann, M.; Taniguchi, Y.; Tasca, L.; Toft, S.; Vaccari, Mattia; Zabl, J.

    2016-06-01

    We present the COSMOS201524 catalog, which contains precise photometric redshifts and stellar masses for more than half a million objects over the 2deg2 COSMOS field. Including new {{YJHK}}{{s}} images from the UltraVISTA-DR2 survey, Y-band images from Subaru/Hyper-Suprime-Cam, and infrared data from the Spitzer Large Area Survey with the Hyper-Suprime-Cam Spitzer legacy program, this near-infrared-selected catalog is highly optimized for the study of galaxy evolution and environments in the early universe. To maximize catalog completeness for bluer objects and at higher redshifts, objects have been detected on a χ 2 sum of the {{YJHK}}{{s}} and z ++ images. The catalog contains ˜ 6× {10}5 objects in the 1.5 deg2 UltraVISTA-DR2 region and ˜ 1.5× {10}5 objects are detected in the “ultra-deep stripes” (0.62 deg2) at {K}{{s}}≤slant 24.7 (3σ, 3″, AB magnitude). Through a comparison with the zCOSMOS-bright spectroscopic redshifts, we measure a photometric redshift precision of {σ }{{Δ }z/(1+{z}s)} = 0.007 and a catastrophic failure fraction of η = 0.5%. At 3\\lt z\\lt 6, using the unique database of spectroscopic redshifts in COSMOS, we find {σ }{{Δ }z/(1+{z}s)} = 0.021 and η = 13.2 % . The deepest regions reach a 90% completeness limit of {10}10{M}⊙ to z = 4. Detailed comparisons of the color distributions, number counts, and clustering show excellent agreement with the literature in the same mass ranges. COSMOS2015 represents a unique, publicly available, valuable resource with which to investigate the evolution of galaxies within their environment back to the earliest stages of the history of the universe. The COSMOS2015 catalog is distributed via anonymous ftp and through the usual astronomical archive systems (CDS, ESO Phase 3, IRSA).

  5. VizieR Online Data Catalog: Revised Bologna Catalog of M31 clusters, V.3 Galleti+, 2007)

    NASA Astrophysics Data System (ADS)

    Galleti, S.; Bellazzini, M.; Federici, L.; Buzzoni, A.; Fusi Pecci, F.

    2007-11-01

    The imager/spectrograph DoLoRes at the 3.52m TNG telescope in La Palma (Canary Island, Spain) was used in service mode in various nights during the period October-December, 2005 (Run 1), and in visitor mode in the nights of October 10-15, 2006 (Run 2), to acquire long slit spectra of 38 M 31 CGCs. Long slit spectra for 16 CGCs in M 31 were obtained with the low resolution spectrograph BFOSC mounted at the 1.52m Cassini Telescope of the Loiano Observatory, near Bologna (Italy), during several runs in 2006: August 19-22 (Run 1), September 1-2 (Run 2), October 25-27 (Run 3), and November 22-23 (Run 4). (3 data files).

  6. VizieR Online Data Catalog: redMaPPer. I. Algorithm applied to SDSS DR8 (Rykoff+, 2014)

    NASA Astrophysics Data System (ADS)

    Rykoff, E. S.; Rozo, E.; Busha, M. T.; Cunha, C. E.; Finoguenov, A.; Evrard, A.; Hao, J.; Koester, B. P.; Leauthaud, A.; Nord, B.; Pierre, M.; Reddick, R.; Sadibekova, T.; Sheldon, E. S.; Wechsler, R. H.

    2016-11-01

    The redMaPPer algorithm is designed to handle an arbitrary photometric galaxy catalog, with an arbitrary number of photometric bands (>=3). Of course, the quality of the output depends on the quality of the photometry. As a case study, in this paper we run redMaPPer on SDSS DR8 data (Aihara et al. 2011ApJS..193...29A), due to its large area and uniform coverage. Although our cluster finder uses only photometric data, we require spectroscopic data to calibrate the red sequence and to validate our photometric redshifts. For this purpose we use the SDSS DR9 spectroscopic catalog (Ahn et al. 2012, V/139). (2 data files).

  7. VizieR Online Data Catalog: 2MASS-selected Flat Galaxy Catalog (2MFGC) (Mitronova+, 2004)

    NASA Astrophysics Data System (ADS)

    Mitronova, S. N.; Karachentsev, I. D.; Karachentseva, V. E.; Jarrett, T. H.; Kudrya, Yu. N.

    2006-09-01

    An all-sky catalog of 18020 disc-like galaxies is presented. The galaxies are selected from the Extended Source Catalog of the Two Micron All-Sky Survey (XSC 2MASS) basing on their 2MASS axial ratio a/b>=3. The Catalog contains data on magnitudes of a galaxy in the J, H, Ks bands, its axial ratio, positional angle, index of luminosity concentration, as well as identification of the galaxy with the LEDA and the NED databases. Unlike the available optical catalogs, the new 2MFGC catalog seems to be more suitable to study cosmic streaming on a scale of z~0.1. The dipole moment of distribution of the bright (K<11mag) 2MFGC objects (l=227°, b=41° or SGL=90°, SGB=-43°) lies within statistical errors (+/-15°) in the direction of the IRAS dipole and the optical RFGC dipole. (1 data file).

  8. COCOA: Simulating Observations of Star Cluster Simulations

    NASA Astrophysics Data System (ADS)

    Askar, Abbas; Giersz, Mirek; Pych, Wojciech; Dalessandro, Emanuele

    2017-03-01

    COCOA (Cluster simulatiOn Comparison with ObservAtions) creates idealized mock photometric observations using results from numerical simulations of star cluster evolution. COCOA is able to present the output of realistic numerical simulations of star clusters carried out using Monte Carlo or N-body codes in a way that is useful for direct comparison with photometric observations. The code can simulate optical observations from simulation snapshots in which positions and magnitudes of objects are known. The parameters for simulating the observations can be adjusted to mimic telescopes of various sizes. COCOA also has a photometry pipeline that can use standalone versions of DAOPHOT (ascl:1104.011) and ALLSTAR to produce photometric catalogs for all observed stars.

  9. VizieR Online Data Catalog: OCARS catalog second version (Malkin, 2016)

    NASA Astrophysics Data System (ADS)

    Malkin, Z. M.

    2016-11-01

    Unlike the first version, supported in 2007-2015, the second version of the OCARS catalog includes three files: ocars.txt is the main file containing the source coordinates, source types, redshifts, and approximate magnitudes, together with commentary; this file corresponds to the first version of the OCARS catalog; ocars_m.txt contains photometric data in the 13 uUBgV rRiIzJHK bands; ocars_n.txt contains a table of corresponding source names in various catalogs; currently, only cross-identifications with IVS programs4 and the LQAC catalog [9] are included; The list of objects included in the OCARS catalog is formed from various astrometric and geodeticVLBI programs and catalogs in the following order: - sources in the ICRF2 [2]; - other sources observed in the framework of IVS programs; - sources from the NASA Goddard VLBI group catalog5 ; - sources from the RFC catalog,6 which is the most complete astrometric catalog of radio sources, is updated each quarter, and contributed more than half the OCARS objects; the latest version of OCARS used the RFC-2016a catalog based on observations obtained in 1980-2015 as part of IVS and other radio astrometric programs [19-31]; - sources from the literature. Optical Characteristics of Astrometric Radio Sources (OCARS) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Last revised: 27-NOV-2016 Latest update: - removed 30+ RFC sources not identified in NED and optics - removed rather long detailed statistics table, which seems to be not interested for most of users; it is always available on request - a few additions and amendments E-mail alerts about updates are available on request. URL of this file is http://www

  10. User Reaction to the Microfiche Catalog in the New York State Library.

    ERIC Educational Resources Information Center

    Baaklini, Soumaya

    A survey was administered to users of the New York State Library's microfiche catalog to determine their success and satisfaction in using the catalog and to examine characteristics of successful and satisfied microfiche catalog users. Usable questionnaires were obtained from 280 catalog users. Responses to selected items were weighted and summed…

  11. Enhancing Access to Information: Designing Catalogs for the 21st Century.

    ERIC Educational Resources Information Center

    Tyckoson, David A., Ed.

    This book addresses the problem of when a library has limited catalog access, and explores various technological methods to expand the catalog beyond its traditional boundaries. Fourteen chapters describe catalog projects in individual libraries: (1) "Enhancing Access to Information: Building Catalogs for the Future" (David A. Tyckoson);…

  12. Congestion at Card and Book Catalogs--A Queuing Theory Approach.

    ERIC Educational Resources Information Center

    Bookstein, Abraham

    The question of whether a library's catalog should consist of cards arranged in a single alphabetical order (the "dictionary catalog) or be segregated as a separate file is discussed. Development is extended to encompass related problems involved in the creation of a book catalog. A model to study the effects of congestion at the catalog is…

  13. A revised moving cluster distance to the Pleiades open cluster

    NASA Astrophysics Data System (ADS)

    Galli, P. A. B.; Moraux, E.; Bouy, H.; Bouvier, J.; Olivares, J.; Teixeira, R.

    2017-01-01

    Context. The distance to the Pleiades open cluster has been extensively debated in the literature over several decades. Although different methods point to a discrepancy in the trigonometric parallaxes produced by the Hipparcos mission, the number of individual stars with known distances is still small compared to the number of cluster members to help solve this problem. Aims: We provide a new distance estimate for the Pleiades based on the moving cluster method, which will be useful to further discuss the so-called Pleiades distance controversy and compare it with the very precise parallaxes from the Gaia space mission. Methods: We apply a refurbished implementation of the convergent point search method to an updated census of Pleiades stars to calculate the convergent point position of the cluster from stellar proper motions. Then, we derive individual parallaxes for 64 cluster members using radial velocities compiled from the literature, and approximate parallaxes for another 1146 stars based on the spatial velocity of the cluster. This represents the largest sample of Pleiades stars with individual distances to date. Results: The parallaxes derived in this work are in good agreement with previous results obtained in different studies (excluding Hipparcos) for individual stars in the cluster. We report a mean parallax of 7.44 ± 0.08 mas and distance of pc that is consistent with the weighted mean of 135.0 ± 0.6 pc obtained from the non-Hipparcos results in the literature. Conclusions: Our result for the distance to the Pleiades open cluster is not consistent with the Hipparcos catalog, but favors the recent and more precise distance determination of 136.2 ± 1.2 pc obtained from Very Long Baseline Interferometry observations. It is also in good agreement with the mean distance of 133 ± 5 pc obtained from the first trigonometric parallaxes delivered by the Gaia satellite for the brightest cluster members in common with our sample. Full Table B.2 is only

  14. Progress Report on the USNO-B Catalog

    NASA Astrophysics Data System (ADS)

    Monet, D. G.

    2000-12-01

    The USNO-B catalog is the extension of the USNO-A catalog that includes proper motions and star/galaxy classifications. The task of compiling this catalog is difficult because the centers of the POSS-I and POSS-II surveys are different (6-degree vs. 5-degree), and this means that the errors of the astrometric solutions that unbend the Schmidt plates must be well understood and small. To verify the reduction algorithms, the Yellow Sky (YS) catalog is being prepared. This is being compiled from the yellow exposures taken as part of the Lick Northern Proper Motion (NPM) Survey and the Yale/San Juan Southern Proper Motion (SPM) Survey. Since the systematic errors of the astrographs and Schmidt telescopes are expected to be quite different, the intercomparison of the YS catalog and the Schmidt plate solutions should provide the best available test of astrometric accuracy. This paper will discuss the compilation of the intermediate catalogs and present some of the intercomparisons. There are no plans for the public release of YS as a separate catalog. Access to the NPM and SPM plates has been provided through the kindness of the astrometric groups at the Lick and Yale observatories, and all plates have been digitized and reduced by the U.S. Naval Observatory's Precision Measuring Machine (PMM).

  15. Yucca Mountain Site Characterization Project Technical Data Catalog (quarterly supplement)

    SciTech Connect

    1993-06-30

    The June 1, 1985, Department of Energy (DOE)/Nuclear Regulatory Commission (NRC) Site-Specific Procedural Agreement for Geologic Repository Site Investigation and Characterization Program requires the DOE to develop and maintain a catalog of data which will be updated and provided to the NRC at least quarterly. This catalog is to include a description of the data; the time (date), place, and method of acquisition; and where it may be examined. The Yucca Mountain Site Characterization Project (YMP) Technical Data Catalog is published and distributed in accordance with the requirements of the Site-Specific Agreement. The YMP Technical Data Catalog is a report based on reference information contained in the YMP Automated Technical Data Tracking System (ATDT). The reference information is provided by Participants for data acquired or developed in support of the YMP. The Technical Data Catalog is updated quarterly and published in the month following the end of each quarter. A complete revision to the Catalog is published at the end of each fiscal year. Supplements to the end-of-year edition are published each quarter. These supplements provide information related to new data items not included in previous quarterly updates and data items affected by changes to previously published reference information. The Technical Data Catalog, dated December 31, 1992, should be retained as the baseline document for the supplements until the end-of-year revision is published and distributed in October 1993.

  16. Yucca Mountain Site Characterization Project technical data catalog: Quarterly supplement

    SciTech Connect

    1994-12-31

    The Department of Energy (DOE)/Nuclear Regulatory Commission (NRC) Site-Specific Procedural Agreement for Geologic Repository Site Investigation and Characterization Program requires the DOE to develop and maintain a catalog of data which will be updated and provided to the NRC at least quarterly. This catalog is to include a description of the data; the time (date), place, and method of acquisition; and where the data may be examined. The Yucca Mountain Site Characterization Project (YMP) Technical Data Catalog is published and distributed-in accordance with the requirements of the Site-Specific Agreement. The YMP Technical Data Catalog is a report based on reference information contained in the YMP Automated Technical Data Tracking System (ATDT). The reference information is provided by Participants for data acquired or developed in support of the YMP. The Technical Data Catalog is updated quarterly and distributed in the month following the end of each quarter. A complete revision to the catalog is published at the end of each fiscal year. Supplements to the end-of-year edition are published each quarter. These supplements provide information related to new data items not included in previous quarterly updates and data items affected by changes to previously published reference information. The Technical Data Catalog, dated September 30, 1994, should be retained as the baseline document for the supplements until the end-of-year revision is published and distributed in October 1995.

  17. Yucca Mountain Site Characterization Project: Technical Data Catalog quarterly supplement

    SciTech Connect

    1994-03-31

    The March 21, 1993, Department of Energy (DOE)/Nuclear Regulatory Commission (NRC) Site-Specific Procedural Agreement for Geologic Repository Site Investigation and Characterization Program requires the DOE to develop and maintain a catalog of data which will be updated and provided to the NRC at least quarterly. This catalog is to include a description of the data; the time (date), place, and method of acquisition; and where it may be examined. The Yucca Mountain Site Characterization Project (YMP) Technical Data Catalog is published and distributed in accordance with the requirements of the Site-Specific Agreement. The YMP Technical Data Catalog is a report based on reference information contained in the YMP Automated Technical Data Tracking System (ATDT). The reference information is provided by Participants for data acquired or developed in support of the YMP. The Technical Data Catalog is updated quarterly and published in the month following the end of each quarter. A complete revision to the Catalog is published at the end of each fiscal year. Supplements to the end-of-year edition are published each quarter. These supplements provide information related to new data items not included in previous quarterly updates and data items affected by changes to previously published reference information. The Technical Data Catalog, dated September 30, 1993, should be retained as the baseline document for the supplements until the end-of-year revision is published and distributed in October 1994.

  18. Yucca Mountain Site Characterization Project Technical Data Catalog (Quarterly supplement)

    SciTech Connect

    1993-12-31

    The March 21, 1993, Department of Energy (DOE)/Nuclear Regulatory Commission (NRC) Site-Specific Procedural Agreement for Geologic Repository Site Investigation and Characterization Program requires the DOE to develop and maintain a catalog of data which will be updated and provided to the NRC at least quarterly. This catalog is to include a description of the data; the time (date), place, and method of acquisition; and where it may be examined. The Yucca Mountain Site Characterization Project (YMP) Technical Data Catalog is published and distributed in accordance with the requirements of the Site-Specific Agreement. The YMP Technical Data Catalog is a report based on reference information contained in the YMP Automated Technical Data Tracking System (ATDT). The reference information is provided by Participants for data acquired or developed in support of the YMP. The Technical Data Catalog is updated quarterly and published in the month following the end of each quarter. A complete revision to the Catalog is published at the end of each fiscal year. Supplements to the end-of-year edition are published each quarter. These supplements provide information related to new data items not included in previous quarterly updates and data items affected by changes to previously published reference information. The Technical Data Catalog, dated September 30, 1993, should be retained as the baseline document for the supplements until the end-of-year revision is published and distributed in October 1994.

  19. In-depth survey of sunspot and active region catalogs

    NASA Astrophysics Data System (ADS)

    Lefèvre, Laure; Clette, Frédéric; Baranyi, Tunde

    2011-08-01

    When consulting detailed photospheric catalogs for solar activity studies spanning long time intervals, solar physicists face multiple limitations in the existing catalogs: finite or fragmented time coverage, limited time overlap between catalogs and even more importantly, a mismatch in contents and conventions. In view of a study of new sunspot-based activity indices, we have conducted a comprehensive survey of existing catalogs. In a first approach, we illustrate how the information from parallel catalogs can be merged to form a much more comprehensive record of sunspot groups. For this, we use the unique Debrecen Photoheliographic Data (DPD), which is already a composite of several ground observatories and SOHO data, and the USAF/Mount Wilson catalog from the Solar Optical Observing Network (SOON). We also describe our semi-interactive cross-identification method, which was needed to match the non-overlapping solar active region nomenclature, the most critical and subtle step when working with multiple catalogs. This effort, focused here first on the last two solar cycles, should lead to a better central database collecting all available sunspot group parameters to address future solar cycle studies beyond the traditional sunspot index time series Ri.

  20. VizieR Online Data Catalog: PACS Evolutionary Probe (PEP-DR1) catalogs (Lutz+, 2011)

    NASA Astrophysics Data System (ADS)

    Lutz, D.; Poglitsch, A.; Altieri, B.; Andreani, P.; Aussel, H.; Berta, S.; Bongiovanni, A.; Brisbin, D.; Cava, A.; Cepa, J.; Cimatti, A.; Daddi, E.; Dominguez-Sanchez, H.; Elbaz, D.; Foerster Schreiber, N. M.; Genzel, R.; Grazian, A.; Gruppioni, C.; Harwit, M.; Le Floc'h, E.; Magdis, G.; Magnelli, B.; Maiolino, R.; Nordon, R.; Perez Garcia, A. M.; Popesso, P.; Pozzi, F.; Riguccini, L.; Rodighiero, G.; Saintonge, A.; Sanchez Portal, M.; Santini, P.; Shao, L.; Sturm, E.; Tacconi, L. J.; Valtchanov, I.; Wetzstein, M.; Wieprecht, E.

    2013-11-01

    PACS catalogs built by the PEP team, with key contributions by Stefano Berta, Benjamin Magnelli, Paola Popesso, Dieter Lutz, Francesca Pozzi, Bruno Altieri, Herve Aussel, Hoseong Hwang, Emeric Le Floc'h, Georgios Magdis, Raanan Nordon, Albrecht Poglitsch, Laurie Riguccini, Amelie Saintonge, Li Shao. For more details, please refer to Lutz et al. (2011A&A...532A..90L) and to the PDF documentation associated to the release. Data and catalogs can be retrieved from the web page http://www.mpe.mpg.de/ir/Research/PEP/publicdatareleases.php See the PDF documentation associated to the PEP DR1 release, http://www.mpe.mpg.de/resources/PEP/DR1tarballs/readmePEP_global.pdf and http://www.mpe.mpg.de/resources/PEP/DR1tarballs/readmePEP_SPIRE.pdf for more details. (69 data files).

  1. Quintuplet Cluster

    NASA Technical Reports Server (NTRS)

    1999-01-01

    Penetrating 25,000 light-years of obscuring dust and myriad stars, NASA's Hubble Space Telescope has provided the clearest view yet of one of the largest young clusters of stars inside our Milky Way galaxy, located less than 100 light-years from the very center of the Galaxy. Having the equivalent mass greater than 10,000 stars like our sun, the monster cluster is ten times larger than typical young star clusters scattered throughout our Milky Way. It is destined to be ripped apart in just a few million years by gravitational tidal forces in the galaxy's core. But in its brief lifetime it shines more brightly than any other star cluster in the Galaxy. Quintuplet Cluster is 4 million years old. It has stars on the verge of blowing up as supernovae. It is the home of the brightest star seen in the galaxy, called the Pistol star. This image was taken in infrared light by Hubble's NICMOS camera in September 1997. The false colors correspond to infrared wavelengths. The galactic center stars are white, the red stars are enshrouded in dust or behind dust, and the blue stars are foreground stars between us and the Milky Way's center. The cluster is hidden from direct view behind black dust clouds in the constellation Sagittarius. If the cluster could be seen from earth it would appear to the naked eye as a 3rd magnitude star, 1/6th of a full moon's diameter apart.

  2. VizieR Online Data Catalog: The KepVIM catalog (Makarov+, 2016)

    NASA Astrophysics Data System (ADS)

    Makarov, V. V.; Goldin, A.

    2016-07-01

    The algorithm described in section 4 was applied to the entire collection of "long-cadence" files archived in the MAST for the principal Kepler mission. A single variability-induced motion (VIM) detection corresponds to a complete data set for a given target collected during one quarter. Therefore, a single target can generate up to 17 VIM detections in the catalog. (2 data files).

  3. VizieR Online Data Catalog: Updated catalog of GALEX nearby galaxies (Bai+, 2015)

    NASA Astrophysics Data System (ADS)

    Bai, Y.; Zou, H.; Liu, J.; Wang, S.

    2015-10-01

    The ultraviolet (UV) catalog of nearby galaxies compiled by Gil de Paz et al. (2007, J/ApJS/173/185) presents the integrated photometry and surface brightness profiles for 1034 nearby galaxies observed by GALEX. We provide an updated catalog of 4138 nearby galaxies based on the latest General Release (GR6/GR7) of GALEX. These galaxies are selected from HyperLeda with apparent diameters larger than 1'. From the surface brightness profiles accurately measured using the deep NUV and FUV images, we have calculated the asymptotic magnitudes, aperture (D25) magnitudes, colors, structural parameters (effective radii and concentration indices), luminosities, and effective surface brightness for these galaxies. Archival optical and infrared photometry from HyperLeda, 2MASS, and IRAS are also integrated into the catalog. Our parameter measurements and some analyses are consistent with those of Paz et al. The (FUV-K) color provides a good criterion to distinguish between early- and late-type galaxies, which can be improved further using the concentration indices. The IRX-β relation is reformulated with our UV-selected nearby galaxies. (3 data files).

  4. The Advanced Camera for Surveys General Catalog: A High Redshift Galaxy Morphology Catalog

    NASA Astrophysics Data System (ADS)

    Griffith, Roger; Newman, J.; Cooper, M.; Stern, D.; Moustakas, L.; Davis, M.

    2009-05-01

    We use publicly available data obtained with the Advanced Camera for Surveys (ACS) instrument on the Hubble Space Telescope to construct the ACS General Catalog (ACS-GC). The ACS-GC includes over 370,000 astronomical sources (stars + galaxies) derived from the AEGIS, COSMOS, GEMS, and GOODS surveys. We include publicly available redshifts from the DEEP2, COMBO-17, TKRS, PEARS and zCOSMOS surveys to supply redshifts for a considerable fraction ( 52%) of the imaging sample. GALAPAGOS was used to construct photometric (SExtractor) and morphological (GALFIT) catalogs. The morphological analysis assumes a single Sersic model for each object to derive quantitative structural parameters. Galaxy Zoo will measure visual morphologies for 200,000 of these galaxies. The ACS-GC includes color images, GALFIT residual images, a galaxy atlas, and a photometry + morphology + redshift catalog. We use these data to investigate the size-redshift relationship for both early and late-type galaxies out to z 1. The entire data set will be made publicly available through the NASA Extragalactic Database (NED) and LEVEL5.

  5. VizieR Online Data Catalog: CANDELS multiwavelength catalog (Galametz+, 2013)

    NASA Astrophysics Data System (ADS)

    Galametz, A.; Grazian, A.; Fontana, A.; Ferguson, H. C.; Ashby, M. L. N.; Barro, G.; Castellano, M.; Dahlen, T.; Donley, J. L.; Faber, S. M.; Grogin, N.; Guo, Y.; Huang, K.-H.; Kocevski, D. D.; Koekemoer, A. M.; Lee, K.-S.; McGrath, E. J.; Peth, M.; Willner, S. P.; Almaini, O.; Cooper, M.; Cooray, A.; Conselice, C. J.; Dickinson, M.; Dunlop, J. S.; Fazio, G. G.; Foucaud, S.; Gardner, J. P.; Giavalisco, M.; Hathi, N. P.; Hartley, W. G.; Koo, D. C.; Lai, K.; de Mello, D. F.; McLure, R. J.; Lucas, R. A.; Paris, D.; Pentericci, L.; Santini, P.; Simpson, C.; Sommariva, V.; Targett, T.; Weiner, B. J.; Wuyts, S.; CANDELS Team

    2013-06-01

    The present multiwavelength catalog is based on public data in the CANDELS UDS field (J2000 position: 02:17:37.5-05:12:00) located within the original UDS field. It includes: * CANDELS HST/ACS (F606W, F814W) and HST/WFC3 (F125W, F160W); Grogin et al. 2011ApJS..197...35G, Koekemoer et al. 2011ApJS..197...36K. * CFHT U-band (UKIDSS; Almaini et al. in prep.), * SUBARU B, V, Rc, i', z' (SXDS; Furusawa et al. 2008, Cat. J/ApJS/176/1) * VLT/HAWK-I Y and Ks bands (HUGS; Fontana et al. in prep.) * UKIRT/WFCam J, H, K (UKIDSS DR8; Almaini et al. in prep.) * Spitzer/IRAC SEDS 3.6 and 4.5um (SEDS; Ashby et al. 2013ApJ...769...80A) * Spitzer/IRAC SpUDS 5.8, 8.0um (PI: J. Dunlop). The catalog is F160W-selected and contains 35932 sources over an area of 201.7 square arcmin and includes radio and X-ray detected sources and spectroscopic redshifts available for 210 sources. The full official CANDELS UDS catalog (which contains some extra columns including additional SExtractor parameters derived from the F160W image) can be found on the CANDELS website at: http://candels.ucolick.org/data_access/UDS.html (1 data file).

  6. Computer-assisted cataloging: experiences at the UCLA Biomedical Library.

    PubMed Central

    Traister, R C

    1975-01-01

    The computer-assisted procedures developed in the UCLA Biomedical Library Cataloging Division have been in effect for approximately three years. The system utilizes a Delta Data System cathode ray tube terminal and cassette attachment for on or off-line input of data. Products of the system include catalog card sets arranged in filing order, a monthly Recent Acquisitions List, and computer-generated book catalogs. Planning, personnel, and equipment requirements are discussed, and preliminary cost figures for various parts of the system are given. Potential applications of the automated system on a regional level and in terms of the library's future automation plans are considered. PMID:1148443

  7. Far infrared supplement: Catalog of infrared observations, second edition

    NASA Technical Reports Server (NTRS)

    Gezari, Daniel Y.; Schmitz, Marion; Mead, Jaylee M.

    1988-01-01

    The Far Infrared Supplement: Catalog of Infrared Observations summarizes all infrared astronomical observations at far infrared wavelengths (5 to 1000 microns) published in the scientific literature from 1965 through 1986. The Supplement list contain 25 percent of the observations in the full Catalog of Infrared Observations (CIO), and essentially eliminates most visible stars from the listings. The Supplement is thus more compact than the main catalog, and is intended for easy reference during astronomical observations. The Far Infrared Supplement (2nd Edition) includes the Index of Infrared Source Positions and the Bibliography of Infrared Astronomy for the subset of far infrared observations listed.

  8. The Kepler Q1 - Q16 Planet Candidate Catalog

    NASA Astrophysics Data System (ADS)

    Mullally, Fergal; Kepler Team

    2015-01-01

    We present an update of the Kepler planet candidate catalog based on analysis of 16 quarters of data. The addition of one more year of data over that presented by Rowe et al. (2015) yields nearly 1500 new objects of interest, from which we identify over 500 new planet candidates. These new candidates are typically smaller, and have longer orbital periods than the KOI sets from our previous work. The full catalog is available at the NASA Exoplanet Archive. We discuss a few features of the catalog that may trip up an unsuspecting user, and highlight some interesting planet candidates.

  9. Content Validation of a Catalog of Exercises for Judo.

    PubMed

    Pedrosa, Gustavo F; Soares, Ytalo M; Gonçalves, Reginaldo; Couto, Bruno P; Dias, Ronaldo A; Costa, Varley T; Kalina, Roman M; Szmuchrowski, Leszek A

    2016-06-01

    This study aimed to assess the content validity of a catalog of 76 judo exercises. Two groups of raters comprising 16 judo experts evaluated the following content validity indicators: Clarity of Language, Practical Pertinence, Theoretical Relevance, and the Dimension of each exercise. The results confirmed the content validity of the judo training catalog with indicators showing scores greater than 0.80. These findings suggest that all 76 judo exercises are pertinent, representative of judo training and understandable for judo coaches. Thus, this catalog of judo exercises may help judo coaches in the selection and recording of exercises.

  10. QUEST1 VARIABILITY SURVEY. III. LIGHT CURVE CATALOG UPDATE

    SciTech Connect

    Rengstorf, A. W.; Thompson, D. L.; Mufson, S. L.; Honeycutt, R. K.; Adams, B.; Baltay, C.; Gebhard, M.; Andrews, P.; Coppi, P.; Emmet, W.; Vivas, A. K.; Abad, C.; Bongiovanni, A.; Briceno, C.; Bruzual, G.; Prugna, F. Della; Hernandez, J.; Bailyn, C.; Ferrin, I.; Fuenmayor, F.

    2009-03-15

    This paper reports an update to the QUEST1 (QUasar Equatorial Survey Team, Phase 1) Variability Survey (QVS) light curve catalog, which links QVS instrumental magnitude light curves to Sloan Digital Sky Survey (SDSS) objects and photometry. In the time since the original QVS catalog release, the overlap between publicly available SDSS data and QVS data has increased by 8% in sky coverage and 16,728 in number of matched objects. The astrometric matching and the treatment of SDSS masks have been refined for the updated catalog. We report on these improvements and present multiple bandpass light curves, global variability information, and matched SDSS photometry for 214,941 QUEST1 objects.

  11. Nuclear Fuel Cycle Options Catalog FY15 Improvements and Additions.

    SciTech Connect

    Price, Laura L.; Barela, Amanda Crystal; Schetnan, Richard Reed; Walkow, Walter M.

    2015-11-01

    The United States Department of Energy, Office of Nuclear Energy, Fuel Cycle Technology Program sponsors nuclear fuel cycle research and development. As part of its Fuel Cycle Options campaign, the DOE has established the Nuclear Fuel Cycle Options Catalog. The catalog is intended for use by the Fuel Cycle Technologies Program in planning its research and development activities and disseminating information regarding nuclear energy to interested parties. The purpose of this report is to document the improvements and additions that have been made to the Nuclear Fuel Cycle Options Catalog in the 2015 fiscal year.

  12. OPEN CLUSTERS IN THE MILKY WAY OUTER DISK: NEWLY DISCOVERED AND UNSTUDIED CLUSTERS IN THE SPITZER GLIMPSE-360, CYG-X, AND SMOG SURVEYS

    SciTech Connect

    Zasowski, G.; Beaton, R. L.; Hamm, K. K.; Majewski, S. R.; Patterson, R. J.; Babler, B.; Churchwell, E.; Meade, M.; Whitney, B. A.; Benjamin, R. A.; Watson, C.

    2013-09-15

    Open stellar clusters are extremely valuable probes of Galactic structure, star formation, kinematics, and chemical abundance patterns. Near-infrared (NIR) data have enabled the detection of hundreds of clusters hidden from optical surveys, and mid-infrared (MIR) data are poised to offer an even clearer view into the most heavily obscured parts of the Milky Way. We use new MIR images from the Spitzer GLIMPSE-360, Cyg-X, and SMOG surveys to visually identify a large number of open cluster candidates in the outer disk of the Milky Way (65 Degree-Sign < l < 265 Degree-Sign ). Using NIR color-magnitude diagrams, stellar isochrones, and stellar reddening estimates, we derive cluster parameters (metallicity, distance, reddening) for those objects without previous identification and/or parameters in the literature. In total, we present coordinates and sizes of 20 previously unknown open cluster candidates; for 7 of these we also present metallicity, distance, and reddening values. In addition, we provide the first estimates of these values for nine clusters that had been previously cataloged. We compare our cluster sizes and other derived parameters to those in the open cluster catalog of Dias et al. and find strong similarities except for a higher mean reddening for our objects, which signifies our increased detection sensitivity in regions of high extinction. The results of this cluster search and analysis demonstrate the ability of MIR imaging and photometry to augment significantly the current census of open clusters in the Galaxy.

  13. Multi-wavelength observations of galaxy clusters: Population evolution and scaling relations for intermediate-redshift clusters

    NASA Astrophysics Data System (ADS)

    Connor, Thomas Patrick

    Galaxy clusters are key signatures of the formation of structure in the Universe due to their positions at the nodes of the cosmic web. However, these privileged positions feature significant amounts of activity as a consequence of frequent accretion and collisions with other galaxies and clusters of galaxies. Thus, a rigorous understanding of cluster evolution constrains not only cosmological structure formation but also galaxy dynamics in the most extreme environments. Here, we examine the evolution of clusters in two situations: how the properties of the hot intracluster gas changes with the total masses of the clusters at the observational frontiers of mass and redshift; and how cluster galaxies evolve with redshift in some of the most massive clusters in the Universe. In Chapter 2 we examine a population of moderate-luminosity clusters at intermediate redshifts using the XMM-Newton telescope with well-determined masses from Hubble Space Telescope (HST) observations. We find that these systems do not deviate from scaling relations between mass, luminosity, and temperature derived from more massive clusters, implying that, even at the redshifts and masses probed here, gravitational energetics still dominate over supernovae. In Chapter 3 we utilize new techniques to maximize a multi-wavelength dataset from HST of 25 massive galaxy clusters. We present new methods for detection and photometry of galaxies in the presence of inconsistent, diffuse background. Using these techniques, we construct a photometric catalog down to M* + 4-5 for clusters at redshift z 0:2 to z 0:9, which we validate with comparisons to spectral observations and a similar catalog. We also consider the luminosity function for these clusters; we find a drop-off in the faint-end slope when only selecting red sequence galaxies. Finally, in Chapter 4, we exploit our new photometric catalogs to study the evolution of the red galaxies, the "red sequence of galaxies," in these massive clusters of

  14. Galaxy Clusters

    NASA Astrophysics Data System (ADS)

    Miller, Christopher J. Miller

    2012-03-01

    There are many examples of clustering in astronomy. Stars in our own galaxy are often seen as being gravitationally bound into tight globular or open clusters. The Solar System's Trojan asteroids cluster at the gravitational Langrangian in front of Jupiter’s orbit. On the largest of scales, we find gravitationally bound clusters of galaxies, the Virgo cluster (in the constellation of Virgo at a distance of ˜50 million light years) being a prime nearby example. The Virgo cluster subtends an angle of nearly 8◦ on the sky and is known to contain over a thousand member galaxies. Galaxy clusters play an important role in our understanding of theUniverse. Clusters exist at peaks in the three-dimensional large-scale matter density field. Their sky (2D) locations are easy to detect in astronomical imaging data and their mean galaxy redshifts (redshift is related to the third spatial dimension: distance) are often better (spectroscopically) and cheaper (photometrically) when compared with the entire galaxy population in large sky surveys. Photometric redshift (z) [Photometric techniques use the broad band filter magnitudes of a galaxy to estimate the redshift. Spectroscopic techniques use the galaxy spectra and emission/absorption line features to measure the redshift] determinations of galaxies within clusters are accurate to better than delta_z = 0.05 [7] and when studied as a cluster population, the central galaxies form a line in color-magnitude space (called the the E/S0 ridgeline and visible in Figure 16.3) that contains galaxies with similar stellar populations [15]. The shape of this E/S0 ridgeline enables astronomers to measure the cluster redshift to within delta_z = 0.01 [23]. The most accurate cluster redshift determinations come from spectroscopy of the member galaxies, where only a fraction of the members need to be spectroscopically observed [25,42] to get an accurate redshift to the whole system. If light traces mass in the Universe, then the locations

  15. Automated Classification of ROSAT Sources Using Heterogeneous Multiwavelength Source Catalogs

    NASA Technical Reports Server (NTRS)

    McGlynn, Thomas; Suchkov, A. A.; Winter, E. L.; Hanisch, R. J.; White, R. L.; Ochsenbein, F.; Derriere, S.; Voges, W.; Corcoran, M. F.

    2004-01-01

    We describe an on-line system for automated classification of X-ray sources, ClassX, and present preliminary results of classification of the three major catalogs of ROSAT sources, RASS BSC, RASS FSC, and WGACAT, into six class categories: stars, white dwarfs, X-ray binaries, galaxies, AGNs, and clusters of galaxies. ClassX is based on a machine learning technology. It represents a system of classifiers, each classifier consisting of a considerable number of oblique decision trees. These trees are built as the classifier is 'trained' to recognize various classes of objects using a training sample of sources of known object types. Each source is characterized by a preselected set of parameters, or attributes; the same set is then used as the classifier conducts classification of sources of unknown identity. The ClassX pipeline features an automatic search for X-ray source counterparts among heterogeneous data sets in on-line data archives using Virtual Observatory protocols; it retrieves from those archives all the attributes required by the selected classifier and inputs them to the classifier. The user input to ClassX is typically a file with target coordinates, optionally complemented with target IDs. The output contains the class name, attributes, and class probabilities for all classified targets. We discuss ways to characterize and assess the classifier quality and performance and present the respective validation procedures. Based on both internal and external validation, we conclude that the ClassX classifiers yield reasonable and reliable classifications for ROSAT sources and have the potential to broaden class representation significantly for rare object types.

  16. Strong Lens Models for Massive Galaxy Clusters in the Reionization Lensing Cluster Survey

    NASA Astrophysics Data System (ADS)

    Cerny, Catherine; Sharon, Keren; Coe, Dan A.; Paterno-Mahler, Rachel; Jones, Christine; Czakon, Nicole G.; Umetsu, Keiichi; Stark, Daniel; Bradley, Larry D.; Trenti, Michele; Johnson, Traci; Bradac, Marusa; Dawson, William; Rodney, Steven A.; Strolger, Louis-Gregory; RELICS Team

    2017-01-01

    We present strong lensing models for five galaxy clusters from the Planck SZ cluster catalog as a part of the Reionization Lensing Cluster Survey (RELICS), a program that seeks to constrain the galaxy luminosity function past z~9 by conducting a wide field survey of massive galaxy clusters with HST (GO-14096, PI: Coe). The strong gravitational lensing effects of these clusters significantly magnify background galaxies, which enhances our ability to discover the large numbers of high redshift galaxies at z~9-12 needed to create a representative sample. We use strong lensing models for these clusters to study their mass distribution and magnification, which allows us to quantify the lensing effect on the background galaxies. These models can then be utilized in the RELICS survey in order to identify high redshift galaxy candidates that may be lensed by the clusters. The intrinsic properties of these galaxy candidates can be derived by removing the lensing effect as predicted by our models, which will meet the science goals of the RELICS survey. We use HST WFC3 and ACS imaging to create lensing models for the clusters RXC J0142.9+4438, ACO-2537, ACO-2163, RXCJ2211.7-0349, and ACT-CLJ0102-49151.

  17. PROBABILISTIC CATALOGS FOR CROWDED STELLAR FIELDS

    SciTech Connect

    Brewer, Brendon J.; Foreman-Mackey, Daniel; Hogg, David W.

    2013-07-01

    We present and implement a probabilistic (Bayesian) method for producing catalogs from images of stellar fields. The method is capable of inferring the number of sources N in the image and can also handle the challenges introduced by noise, overlapping sources, and an unknown point-spread function. The luminosity function of the stars can also be inferred, even when the precise luminosity of each star is uncertain, via the use of a hierarchical Bayesian model. The computational feasibility of the method is demonstrated on two simulated images with different numbers of stars. We find that our method successfully recovers the input parameter values along with principled uncertainties even when the field is crowded. We also compare our results with those obtained from the SExtractor software. While the two approaches largely agree about the fluxes of the bright stars, the Bayesian approach provides more accurate inferences about the faint stars and the number of stars, particularly in the crowded case.

  18. Star clusters

    NASA Astrophysics Data System (ADS)

    Labhardt, Lukas; Binggeli, Bruno

    Star clusters are at the heart of astronomy, being key objects for our understanding of stellar evolution and galactic structure. Observations with the Hubble Space Telescope and other modern equipment have revealed fascinating new facts about these galactic building blocks. This book provides two comprehensive and up-to-date, pedagogically designed reviews on star clusters by two well-known experts in the field. Bruce Carney presents our current knowledge of the relative and absolute ages of globular clusters and the chemical history of our Galaxy. Bill Harris addresses globular clusters in external galaxies and their use as tracers of galaxy formation and cosmic distance indicators. The book is written for graduate students as well as professionals in astronomy and astrophysics.

  19. Occupational Clusters.

    ERIC Educational Resources Information Center

    Pottawattamie County School System, Council Bluffs, IA.

    The 15 occupational clusters (transportation, fine arts and humanities, communications and media, personal service occupations, construction, hospitality and recreation, health occupations, marine science occupations, consumer and homemaking-related occupations, agribusiness and natural resources, environment, public service, business and office…

  20. Cluster generator

    DOEpatents

    Donchev, Todor I.; Petrov, Ivan G.

    2011-05-31

    Described herein is an apparatus and a method for producing atom clusters based on a gas discharge within a hollow cathode. The hollow cathode includes one or more walls. The one or more walls define a sputtering chamber within the hollow cathode and include a material to be sputtered. A hollow anode is positioned at an end of the sputtering chamber, and atom clusters are formed when a gas discharge is generated between the hollow anode and the hollow cathode.