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GALEX–SDSS catalogs for statistical studies

Budavári, Tamás and Heinis, Sébastien and Szalay, Alexander S. and Nieto-Santisteban, María and Gupchup, Jayant and Shiao, Bernie and Smith, Myron and Chang, Ruixiang and Kauffmann, Guinevere and Morrissey, Patrick and Schiminovich, David and Milliard, Bruno and Wyder, Ted K. and Martin, D. Christopher and Barlow, Tom A. and Seibert, Mark and Forster, Karl and Bianchi, Luciana (2009) GALEX–SDSS catalogs for statistical studies. Astrophysical Journal, 694 (2). pp. 1281-1292. ISSN 0004-637X.

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We present a detailed study of the Galaxy Evolution Explorer’s (GALEX) photometric catalogs with special focus on the statistical properties of the All-sky and Medium Imaging Surveys. We introduce the concept of primaries to resolve the issue of multiple detections and follow a geometric approach to define clean catalogs with well understood selection functions. We cross-identify the GALEX sources (GR2+3) with Sloan Digital Sky Survey (SDSS; DR6) observations, which indirectly provides an invaluable insight into the astrometric model of the UV sources and allows us to revise the band merging strategy. We derive the formal description of the GALEX footprints as well as their intersections with the SDSS coverage along with analytic calculations of their areal coverage. The crossmatch catalogs are made available for the public. We conclude by illustrating the implementation of typical selection criteria in SQL for catalog subsets geared toward statistical analyses, e.g., correlation and luminosity function studies.

Item Type:Article
Related URLs:
URLURL TypeDescription
Smith, Myron0000-0002-3321-1432
Morrissey, Patrick0000-0001-8177-1023
Martin, D. Christopher0000-0002-8650-1644
Seibert, Mark0000-0002-1143-5515
Forster, Karl0000-0001-5800-5531
Additional Information:© 2009. The American Astronomical Society. Received 2008 August 14; accepted 2009 January 5; published 2009 March 24. GALEX is a NASA Small Explorer. We acknowledge NASA’s support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d’Etudes Spatiales of France and the Korean Ministry of Science and Technology. This research has made use of data obtained from and software provided by the US National Virtual Observatory, which is sponsored by the National Science Foundation. T.B. gratefully acknowledges support from the Gordon and Betty Moore Foundation via GBMF 554.
Group:Space Radiation Laboratory, Space Astrophysics Laboratory
Funding AgencyGrant Number
Gordon and Betty Moore FoundationGBMF 554
Subject Keywords:catalogs; methods: statistical; surveys; ultraviolet: general
Issue or Number:2
Record Number:CaltechAUTHORS:20090501-142926332
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14134
Deposited By: Marie Noren
Deposited On:17 Aug 2009 18:15
Last Modified:09 Mar 2020 21:00

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