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The Northern Sky Optical Cluster Survey. III. A Cluster Catalog Covering PI Steradians

Gal, R. R. and Lopes, P. A. A. and de Carvalho, R. R. and Kohl-Moreira, J. L. and Capelato, H. V. and Djorgovski, S. G. (2009) The Northern Sky Optical Cluster Survey. III. A Cluster Catalog Covering PI Steradians. Astronomical Journal, 137 (2). pp. 2981-2999. ISSN 0004-6256. doi:10.1088/0004-6256/137/2/2981.

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We present the complete galaxy cluster catalog from the Northern Sky Optical Cluster Survey, a new, objectively defined catalog of candidate galaxy clusters at z ≾ 0.25 drawn from the Digitized Second Palomar Observatory Sky Survey (DPOSS). The data presented here cover the Southern Galactic Cap, as well as the less well-calibrated regions of the Northern Galactic Cap. In addition, due to improvements in our cluster finder and measurement methods, we provide an updated catalog for the well-calibrated Northern Galactic Cap region previously published in Paper II. The complete survey covers 11,411 deg^2, with over 15,000 candidate clusters. We discuss improved photometric redshifts, richnesses, and optical luminosities which are provided for each cluster. A variety of substructure measures are computed for a subset of over 11,000 clusters. We also discuss the derivation of dynamical radii r 200 and its relation to cluster richness. A number of consistency checks between the three areas of the survey are also presented, demonstrating the homogeneity of the catalog over disjoint sky areas. We perform extensive comparisons to existing optically and X-ray-selected cluster catalogs, and derive new X-ray luminosities and temperatures for a subset of our clusters. We find that the optical and X-ray luminosities are well correlated, even using relatively shallow ROSAT All Sky Survey and DPOSS data. This survey provides a good comparison sample to the MaxBCG catalog based on Sloan Digital Sky Survey Data, and complements that survey at low redshifts 0.07 < z < 0.1.

Item Type:Article
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URLURL TypeDescription
de Carvalho, R. R.0000-0002-1283-3363
Djorgovski, S. G.0000-0002-0603-3087
Additional Information:© 2009. The American Astronomical Society. Received 2007 October 23; accepted 2008 October 13; published 2009 January 13. Print publication: Issue 2 (2009 February). Processing and cataloging of DPOSS was supported by a generous grant from the Norris Foundation, and by other private donors. S.G.D. acknowledges partial support from the NSF grant AST-0407448, and the Ajax Foundation. We would like to thank Dr. Peter Kalberla for deriving the H I column densities at all of the cluster positions. PAAL was supported by the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, processes 03/04110-3, 06/04955-1, and 07/04655-0). This work would have been impossible without the DPOSS team, especially Stephen Odewahn, Robert Brunner, and Ashish Mahabal. The POSS-II photographic team at Palomar Observatory, the STScI digitization team, numerous undergraduates who assisted with the calibration, and the many people who worked on DPOSS all made important contributions to the photometric survey. Online-only material: color figures, machine-readable and VO tables.
Funding AgencyGrant Number
Kenneth T. and Eileen L. Norris FoundationUNSPECIFIED
Ajax FoundationUNSPECIFIED
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)03/04110-3
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)06/04955-1
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)07/04655-0
Subject Keywords:catalogs; galaxies: clusters: general; large-scale structure of universe; surveys
Issue or Number:2
Record Number:CaltechAUTHORS:GALaj09
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13115
Deposited By: Archive Administrator
Deposited On:21 Jan 2009 23:35
Last Modified:08 Nov 2021 22:35

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