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The 2dF-SDSS LRG and QSO Survey: The spectroscopic QSO catalogue | 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
; | Date: |
28 Oct 2008 | Abstract: | We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG 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 AGN 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^2 and
contains new spectra of 16326 objects, of which 8764 are QSOs, and 7623 are
newly discovered (the remainder were previously identified by the 2QZ and SDSS
surveys). The full QSO sample (including objects previously observed in the
SDSS and 2QZ surveys) contains 12702 QSOs. The new 2SLAQ spectroscopic data set
also contains 2343 Galactic stars, including 362 white dwarfs, and 2924 narrow
emission line galaxies with a median redshift of z=0.22. 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 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 this http URL | Source: | arXiv, 0810.4955 | Services: | Forum | Review | PDF | Favorites |
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