Bayesian Quasar Classification in the Optical/Mid-IR

Details Bayesian Quasar Classification in the Optical/Mid-IR Bayesian Quasar Classification in the Optical/Mid-IR

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20914904r&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #149.04; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

We discuss the optimal selection and photometric redshift estimation of quasars from combined SDSS plus Spitzer-IRAC photometry. Using only the deeper 3.6 and 4.5 micron bands of Spitzer-IRAC and single epoch SDSS photometry, we reliably identify 2580 quasar candidates in the Spitzer FLS, ELAIS-N1/N2, and Lockman Hole fields --roughly a density of 110 per square degree and 10 times the density of the SDSS spectroscopic sample. Photometric redshifts are estimated to be accurate to 4 percent or better for 86 percent of the sample. Such densities and accuracies should allow for powerful investigations of the high-redshift quasar luminosity function and possibly the size scale of the universe through baryon acoustic oscillations if applied to a large area Spitzer-IRAC survey which substantially overlaps the SDSS footprint.

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