J/ApJ/710/1498ivo://CDS.VizieR/J/ApJ/710/1498doi:10.26093/cds/vizier.17101498CDSGlikman E.Bogosavljevic M.Djorgovski S.G.Stern D.Dey A.,Jannuzi B.T.Mahabal A.2017-12-22T05:33:10Z2012-04-18T07:49:15ZCDS support team

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

cds-question@unistra.frquasarsredshiftedapparent-magnitudesurveysThe evolution of the quasar luminosity function (QLF) is one of the basic cosmological measures providing insight into structure formation and mass assembly in the universe. We have conducted a spectroscopic survey to find faint quasars (-26.0<M_1450_<-22.0) at redshifts z=3.8-5.2 in order to measure the faint end of the QLF at these early times. Using available optical imaging data from portions of the NOAO Deep Wide-Field Survey and the Deep Lens Survey, we have color-selected quasar candidates in a total area of 3.76deg^2^. Thirty candidates have R<=23mag. We conducted spectroscopic follow-up for 28 of our candidates and found 23 QSOs, 21 of which are reported here for the first time, in the 3.74<z<5.06 redshift range.2010ApJ...710.1498Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/710/1498CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/535/A38 : Observations of NOAO Bootes field at 153MHz (Intema+, 2011)J/ApJ/699/782 : High-redshift SDSS-DR5 QSOs (Diamond-Stanic+, 2009)J/ApJ/693/8 : High-redshift QSOs in the COSMOS survey (Brusa+, 2009)J/ApJ/675/49 : High-redshift QSOs in the SWIRE survey (Siana+, 2008)J/AJ/133/2222 : Clustering of high-redshift QSOs from SDSS (Shen+, 2007)J/AJ/131/2766 : Quasar luminosity function from SDSS-DR3 (Richards+, 2006)J/ApJ/641/140 : Optical counterparts in the NDWFS Bootes field (Brand+, 2006)J/ApJS/161/9 : X-ray survey of the NDWFS Bootes field (Kenter+, 2005)J/AJ/121/31 : High-redshift quasars in SDSS (Fan+, 2001)http://www.archive.noao.edu/ndwfs/ : NOAO Deep Wide-Field Survey home pagehttp://dls.physics.ucdavis.edu/ : Deep Lens Survey home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/710/1498https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/710/1498http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/710/1498https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/710/1498https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/710/1498http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/710/1498GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/710/1498/table3 (NOAO Deep Wide-Field Survey (NDWFS) candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/710/1498/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/710/1498/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/710/1498/table3?GETtext/xml+votable180.050000true216.30012532.32827780.005555555555555556Cone search capability for table J/ApJ/710/1498/table4 (Deep Lens Survey (DLS) candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/710/1498/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/710/1498/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/710/1498/table4?GETtext/xml+votable180.050000true138.80812529.445750.005555555555555556Cone search capability for table J/ApJ/710/1498/table5 (z>~4 quasar sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/710/1498/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/710/1498/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/710/1498/table5?GETtext/xml+votable180.050000true216.34462532.80750.0055555555555555565/2286 6/4943 4954 4964 4965 4976 9135 9148 9150 9151 10501 10516 26749 26750 26751 26836 268372.367228618189496e-19 3.3785437584409506e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/710/1498?format=asciiOpticaldefaultJ/ApJ/710/1498/table3NOAO Deep Wide-Field Survey (NDWFS) candidatesz? Redshiftsrc.redshiftfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainFieldField identification (1)meta.id;obs.fieldcharBWmagThe B_W_ band magnitude (AB mag) (G1)magphot.mag;em.opt.Bfloate_BWmag?=99 Uncertainty in BWmag (2)magstat.error;phot.magfloatnullableRmagThe R band magnitude (AB mag) (G1)magphot.mag;em.opt.Rfloate_RmagUncertainty in Rmagmagstat.error;phot.mag;em.opt.RfloatImagThe I band magnitude (AB mag) (G1)magphot.mag;em.opt.Ifloate_ImagUncertainty in Imagmagstat.error;phot.mag;em.opt.IfloatFWHMFull-Width at Half-Maximum in R bandarcsecphys.angSizefloatClassSource classification (AGN, LBG (Lyman-break galaxie), QSO, ? or null)src.classcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refcharJ/ApJ/710/1498/table4Deep Lens Survey (DLS) candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainFieldField identification (1)meta.id;obs.fieldcharBmagThe B band magnitude (AB mag)(G1)magphot.mag;em.opt.Bfloate_Bmag?=99 Uncertainty in Bmag (2)magstat.error;phot.mag;em.opt.BfloatnullableVmagThe V band magnitude (AB mag) (G1)magphot.mag;em.opt.Vfloate_VmagUncertainty in Rmagmagstat.error;phot.mag;em.opt.VfloatRmagThe R band magnitude (AB mag) (G1)magphot.mag;em.opt.Rfloate_RmagUncertainty in Rmagmagstat.error;phot.mag;em.opt.RfloatzmagThe z band magnitude (AB mag) (G1)magphot.mag;em.opt.Ifloate_zmagUncertainty in zmagmagstat.error;phot.mag;em.opt.IfloatFWHMFull-Width at Half-Maximum in R bandarcsecphys.angSizefloatz? Redshiftsrc.redshiftfloatnullableClassSource classification (QSO or null)src.classcharSimbadSimbad column added by the CDSmeta.refcharNEDSimbad column added by the CDSmeta.refcharJ/ApJ/710/1498/table5z>~4 quasar samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSetNDWFS (table 3) or DLS (table4) surveymeta.id;meta.datasetcharNameNDWFS or DLS name (JHHMMSS.ss+DDMMSS.s)meta.idcharRmagThe R band magnitude (AB mag) (G1)magphot.mag;em.opt.RfloatzRedshift (spectroscopic)src.redshiftfloatFselThe selection function (f_sel_)stat.fit.paramfloatFspec[0/1] Spectroscopic completeness (f_spec_)meta.notefloatM1450sAbsolute magnitude at rest-frame 1450{AA} from simulations (1)magphys.magAbsfloatzlimsLimiting redshift from simulations (1)(2)src.redshiftfloatRem[bc] survey magnitude limit > 23 (2)meta.notecharVasAvailable volume from simulations (1)(2) (4)Mpc**3.arcmin**-2phys.volumefloatM1450M_1450_ from spectrummagphys.magAbsfloatzlimLimiting redshift from spectrum (2)src.redshiftfloatVaspAvailable volume from spectrum (2)(4)Mpc**3.arcmin**-2phys.volumefloatAreaAreadeg**2phys.area;instrfloat_RAPositions from Name (right ascension part)degpos.eq.ra;meta.main_DEPositions from Name (declination part)degpos.eq.dec;meta.main