J/ApJ/743/125ivo://CDS.VizieR/J/ApJ/743/125doi:10.26093/cds/vizier.17430125CDSKirkpatrick J.A.Schlegel D.J.Ross N.P.Myers A.D.Hennawi J.F.,Sheldon E.S.Schneider D.P.Weaver B.A.2013-06-30T07:58:59Z2013-06-18T07:06:13ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frvisible-astronomysloan-photometryredshiftedquasarssurveysastronomical-modelsWe present a new method for quasar target selection using photometric fluxes and a Bayesian probabilistic approach. For our purposes, we target quasars using Sloan Digital Sky Survey (SDSS) photometry to a magnitude limit of g=22. The efficiency and completeness of this technique are measured using the Baryon Oscillation Spectroscopic Survey (BOSS) data taken in 2010. This technique was used for the uniformly selected (CORE) sample of targets in BOSS year-one spectroscopy to be realized in the ninth SDSS data release. When targeting at a density of 40 objects deg^-2^ (the BOSS quasar targeting density), the efficiency of this technique in recovering z>2.2 quasars is 40%. The completeness compared to all quasars identified in BOSS data is 65%. This paper also describes possible extensions and improvements for this technique.2011ApJ...743..125Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/743/125CatalogResearchIsServedByTAP VizieR generic servicerelated-toV/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)VII/269 : SDSS Quasar Catalog, DR9Q (Paris+, 2012)VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)J/AJ/142/78 : New 2.2<z<3 quasars from SDSS and UKIDSS (Wu+, 2011)J/ApJ/728/26 : QSO selection based on photometry (MacLeod+, 2011)J/ApJ/719/1672 : SDSS binary quasars at high redshift. I. (Hennawi+, 2010)J/ApJ/699/782 : High-redshift SDSS-DR5 QSOs (Diamond-Stanic+, 2009)J/AJ/137/3884 : Quasar candidates selected from the SDSS (Richards+, 2009)J/ApJS/180/67 : Photometric selection of QSOs from SDSS. II. (Richards+, 2009)J/MNRAS/392/19 : The 2dF-SDSS QSO survey (Croom+, 2009)J/ApJ/654/115 : DEEP2 Galaxy Redshift Survey: SDSS QSOs (Coil+, 2007)J/AJ/131/2788 : Redshifts in the SFQS survey (Jiang+, 2006)J/AJ/131/2766 : Quasar luminosity function from SDSS-DR3 (Richards+, 2006)J/ApJS/155/257 : NBC Quasar Candidate Catalog (Richards+, 2004)J/AJ/126/2579 : SDSS quasar catalog. II. First data release (Schneider+, 2003)J/AJ/121/31 : High-redshift quasars in SDSS (Fan+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/743/125https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/743/125http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/743/125https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/743/125https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/743/125http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/743/125GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.85864675833786e-19 3.5010283109654867e-19OpticaldefaultJ/ApJ/743/125/table3McDonald (2009, priv. com.) weightsrmag[17.5/23.5] SDSS r-band magnitudemagphot.mag;em.opt.RfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintz[2/4] Redshiftsrc.redshiftfloatWeight[0/1] Corresponding weight w_O'_ in the likelihood function (see section 4.3)stat.likelihoodfloat