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The 2dF-SDSS LRG and QSO Survey: the spectroscopic QSO catalogue |
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| Authors: | Scott M Croom Gordon T Richards Tom Shanks Brian J Boyle Robert G Sharp Joss Bland-Hawthorn Terry Bridges Robert J Brunner Russell Cannon Daniel Carson Kuenley Chiu Matthew Colless Warrick Couch Roberto De Propris Michael J Drinkwater Alastair Edge Stephen Fine Jon Loveday Lance Miller Adam D Myers Robert C Nichol Phil Outram Kevin Pimbblet Isaac Roseboom Nicholas Ross Donald P Schneider Allyn Smith Chris Stoughton Michael A Strauss David Wake |
| Institution: | Institute of Astronomy, School of Physics, University of Sydney, NSW 2006, Australia;Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia;Department of Physics, Drexel University, Philadelphia, PA 19104, USA;Department of Physics, University of Durham, South Road, Durham DH1 3LE;Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia;Department of Astronomy, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;Institute of Cosmology and Gravitation, Mercantile House, Hampshire Terrace, University of Portsmouth, Portsmouth PO1 2EG;School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL;Centre for Astrophysics &Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia;Cerro Tololo Inter-American Observatory, Casilla 603, La Serena, Chile;Department of Physics, University of Queensland, Brisbane, QLD 4072, Australia;Astronomy Centre, University of Sussex, Falmer, Brighton BN1 9QJ;Department of Physics, Oxford University, 1 Keble Road, Oxford OX1 3RH;Department of Astronomy and Astrophysics, 525 Davey Laboratory, Pennsylvania State University, University Park, PA 16802, USA;Department of Physics and Astronomy, University of Wyoming, PO Box 3905, Laramie, WY 82071, USA;Fermi National Accelerator Laboratory, PO Box 500, Batavia, IL 60510, USA;Princeton University Observatory, Peyton Hall, Princeton, NJ 08544, USA |
| Abstract: | We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG (luminous red galaxy) and QSO (2SLAQ) survey. This is a deep, 18 < g < 21.85 (extinction corrected), sample aimed at probing in detail the faint end of the broad line active galactic nuclei luminosity distribution at z ? 2.6 . The candidate QSOs were selected from SDSS photometry and observed spectroscopically with the 2dF spectrograph on the Anglo-Australian Telescope. This sample covers an area of 191.9 deg We present detailed completeness estimates for the survey, based on modelling of QSO colours, including host-galaxy contributions. This calculation shows that at g ? 21.85 QSO colours are significantly affected by the presence of a host galaxy up to redshift z ～ 1 in the SDSS ugriz bands. In particular, we see a significant reddening of the objects in g ? i towards the fainter g -band magnitudes. This reddening is consistent with the QSO host galaxies being dominated by a stellar population of age at least 2–3 Gyr. The full catalogue, including completeness estimates, is available on-line at http://www.2slaq.info/ . |
| Keywords: | catalogues surveys white dwarfs galaxies: active quasars: general galaxies: Seyfert |