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Journal article
Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Quasar Sample
The Astronomical journal, v 123(6), pp 2945-2975
13 Feb 2002
Abstract
Astron.J.123:2945,2002 We describe the algorithm for selecting quasar candidates for optical
spectroscopy in the Sloan Digital Sky Survey. Quasar candidates are selected
via their non-stellar colors in "ugriz" broad-band photometry, and by matching
unresolved sources to the FIRST radio catalogs. The automated algorithm is
sensitive to quasars at all redshifts lower than z=5.8. Extended sources are
also targeted as low-redshift quasar candidates in order to investigate the
evolution of Active Galactic Nuclei (AGN) at the faint end of the luminosity
function. Nearly 95% of previously known quasars are recovered (based on 1540
quasars in 446 square degrees). The overall completeness, estimated from
simulated quasars, is expected to be over 90%, whereas the overall efficiency
(quasars:quasar candidates) is better than 65%. The selection algorithm targets
ultraviolet excess quasars to i^*=19.1 and higher-redshift (z>3) quasars to
i^*=20.2, yielding approximately 18 candidates per square degree. In addition
to selecting ``normal'' quasars, the design of the algorithm makes it sensitive
to atypical AGN such as Broad Absorption Line quasars and heavily reddened
quasars.
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Details
- Title
- Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Quasar Sample
- Creators
- Gordon T Richards - Pennsylvania State UniversityXiaohui Fan - EarthTech InternationalHeidi Jo Newberg - Rensselaer Polytechnic InstituteMichael A Strauss - Princeton UniversityDaniel E. Vanden Berk - FermilabDonald P Schneider - Pennsylvania State UniversityBrian Yanny - FermilabAdam Boucher - Rensselaer Polytechnic InstituteScott Burles - FermilabJoshua A Frieman - FermilabJames E Gunn - Princeton UniversityPatrick B Hall - Pontificia Universidad Católica de ChileZeljko Ivezic - Princeton UniversityStephen KentJon Loveday - University of SussexRobert H Lupton - Princeton UniversityConstance M Rockosi - University of ChicagoDavid J Schlegel - Princeton UniversityChris Stoughton - FermilabMark SubbaRao - University of ChicagoDonald G York - University of Chicago
- Publication Details
- The Astronomical journal, v 123(6), pp 2945-2975
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000175830300005
- Scopus ID
- 2-s2.0-0012314515
- Other Identifier
- 991019201379904721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics