Eight-Dimensional Mid-Infrared/Optical Bayesian Quasar Selection

Details Eight-Dimensional Mid-Infrared/Optical Bayesian Quasar Selection Eight-Dimensional Mid-Infrared/Optical Bayesian Quasar Selection

2008-10-20

arxiv.org/abs/0810.3567v2

Astron.J.137:3884,2009

Astronomy and Astrophysics

Astrophysics

49 pages, 14 figures, 7 tables. AJ, accepted

Scientific paper

10.1088/0004-6256/137/4/3884

We explore the multidimensional, multiwavelength selection of quasars from mid-IR (MIR) plus optical data, specifically from Spitzer-IRAC and the Sloan Digital Sky Survey (SDSS). We apply modern statistical techniques to combined Spitzer MIR and SDSS optical data, allowing up to 8-D color selection of quasars. Using a Bayesian selection method, we catalog 5546 quasar candidates to an 8.0 um depth of 56 uJy over an area of ~24 sq. deg; ~70% of these candidates are not identified by applying the same Bayesian algorithm to 4-color SDSS optical data alone. Our selection recovers 97.7% of known type 1 quasars in this area and greatly improves the effectiveness of identifying 3.5

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