J/ApJS/219/39ivo://CDS.VizieR/J/ApJS/219/39doi:10.26093/cds/vizier.22190039CDSRichards G.T.Myers A.D.Peters C.M.Krawczyk C.M.Chase G.Ross N.P.,Fan X.Jiang L.Lacy M.McGreer I.D.Trump J.R.Riegel R.N.2017-06-27T06:38:13Z2015-12-08T14:05:12ZCDS support team

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

cds-question@unistra.frquasarsvisible-astronomysloan-photometryinfrared-photometryredshiftedWe identify 885503 type 1 quasar candidates to i<~22 using the combination of optical and mid-IR photometry. Optical photometry is taken from the Sloan Digital Sky Survey-III: Baryon Oscillation Spectroscopic Survey (SDSS-III/BOSS), while mid-IR photometry comes from a combination of data from the Wide-field Infrared Survey Explorer (WISE) "AllWISE" data release and several large-area Spitzer Space Telescope fields. Selection is based on a Bayesian kernel density algorithm with a training sample of 157701 spectroscopically confirmed type 1 quasars with both optical and mid-IR data. Of the quasar candidates, 733713 lack spectroscopic confirmation (and 305623 are objects that we have not previously classified as photometric quasar candidates). These candidates include 7874 objects targeted as high-probability potential quasars with 3.5<z<5 (of which 6779 are new photometric candidates). Our algorithm is more complete to z>3.5 than the traditional mid-IR selection "wedges" and to 2.2<z<3.5 quasars than the SDSS-III/BOSS project. Number counts and luminosity function analysis suggest that the resulting catalog is relatively complete to known quasars and is identifying new high-z quasars at z>3. This catalog paves the way for luminosity-dependent clustering investigations of large numbers of faint, high-redshift quasars and for further machine-learning quasar selection using Spitzer and WISE data combined with other large-area optical imaging surveys.2015ApJS..219...39Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/39CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/328 : AllWISE Data Release (Cutri+ 2013)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)IX/45 : The Chandra Source Catalog, Release 1.1 (Evans+ 2012)VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)J/ApJS/213/12 : SDSS Stripe 82 co-added runs (Jiang+, 2014)J/ApJ/773/14 : BOSS: quasar luminosity function (Ross+, 2013)J/ApJ/772/26 : AGN with WISE. II. The NDWFS Bootes field (Assef+, 2013)J/ApJS/206/4 : SED for luminous QSOs (Krawczyk+, 2013)J/ApJ/768/105 : z~5 QSO luminosity function from SDSS (McGreer+, 2013)J/MNRAS/424/2876 : Large area KX quasar catalogue (Maddox+, 2012)J/AJ/144/49 : Quasars from SDSS-DR7, WISE and UKIDSS surveys (Wu+, 2012)J/ApJS/200/8 : AGES: the AGN and Galaxy Evolution Survey (Kochanek+, 2012)J/ApJS/199/3 : The quasars MMT-BOSS pilot survey (Ross+, 2012)J/ApJ/742/61 : Phot. redshift of AGNs from XMM- and C-COSMOS (Salvato+ 2011)J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)J/ApJ/728/23 : GALEX UV-bright high-redshift quasars (Worseck+, 2011)J/ApJ/719/1672 : SDSS binary quasars at high redshift. I. (Hennawi+, 2010)J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)J/ApJ/713/970 : Low-resolution SED templates for AGNs & gal. (Assef+, 2010)J/ApJ/710/1498 : QSO luminosity function at z~4 (Glikman+, 2010)J/ApJ/701/428 : The Spitzer Deep, Wide-Field Survey (SDWFS) (Ashby+, 2009)J/ApJ/696/1195 : COSMOS AGN spectroscopic survey. I. (Trump+, 2009)J/AJ/137/3884 : Quasar candidates selected from the SDSS (Richards+, 2009)J/ApJ/693/8 : High-redshift QSOs in the COSMOS survey (Brusa+, 2009)J/MNRAS/392/19 : The 2dF-SDSS QSO survey (Croom+, 2009)J/ApJS/180/67 : Phot. selection of quasars from SDSS. II. (Richards+, 2009)J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)J/AJ/133/2222 : Clustering of high-redshift QSOs from SDSS (Shen+, 2007)J/AJ/132/999 : SDSS quasar lens search (Oguri+, 2006)J/AJ/132/231 : MMT redshift survey of 24um sources (Papovich+, 2006)J/ApJ/644/100 : SDSS quasars in the COSMOS field (Prescott+, 2006)J/AJ/131/2766 : Quasar luminosity function from SDSS-DR3 (Richards+, 2006)J/ApJS/155/257 : NBC Quasar Candidate Catalog (Richards+, 2004)http://www.sdss3.org/ : SDSS-III home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/219/39https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/219/39http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/219/39https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/219/39https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/219/39http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/219/39GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/219/39/master (*Master quasar catalog (table 1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/219/39/master?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/219/39/master?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/219/39/master?GETtext/xml+votable180.050000true0.0006335.517841110.005555555555555556Cone search capability for table J/ApJS/219/39/cand (*Optical+MIR photometric quasar candidates catalog (table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/219/39/cand?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/219/39/cand?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/219/39/cand?GETtext/xml+votable180.050000true0.0006288935.517841110.0055555555555555561/4 5 8 10 27 2/25 28 36 38 70 73 74 75 76 77 78 103 107 3/10 32 34 97 116 148 150 176 177 178 184 193 197 208 271 275 276 277 278 284 286 287 291 316 317 318 341 343 405 406 407 409 410 411 421 423 427 491 494 495 506 4/0 2 18 21 34 44 46 47 66 99 106 123 126 132 133 134 140 151 160 162 163 166 176 180 385 387 396 397 399 468 469 472 474 599 605 607 624 625 626 629 631 632 634 637 639 716 718 720 722 724 728 740 744 745 746 768 769 771 784 785 787 792 796 797 799 836 837 838 840 841 848 863 885 1049 1077 1078 1079 1081 1082 1083 1095 1097 1098 1099 1116 1117 1118 1140 1142 1143 1159 1163 1276 1277 1278 1369 1396 1397 1399 1405 1420 1430 1431 1445 1446 1506 1599 1635 1689 1690 1691 1701 1702 1703 1705 1706 1707 1877 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36852 36854 36855 38783 38869 38871 38877 40895 40927 40938 40939 40942 40943 40947 44013 44014 44015 44024 44026 44343 44365 44367 44378 44379 44386 44387 44406 44407 44433 44436 44437 44480 44481 44483 44489 44491 44496 44497 44498 44504 44506 44513 44514 44515 44574 44575 44605 44607 44616 44618 44619 44652 44654 44693 44740 44742 44743 44744 44745 44747 44762 44769 44771 44784 44786 44831 44853 44855 44861 44863 44868 44869 44870 44876 44878 44900 44902 44908 44910 44949 44951 44957 44958 44959 45022 45023 45037 45038 45039 45041 45042 45043 48538 48549 48551 48557 48566 48618 48670 48671 48714 48715 48718 48719 48730 48731 48734 48735 48748 48749 48760 48761 48849 48851 48857 48858 48859 48879 48892 48893 48894 48900 48902 48903 48908 48909 48910 48913 48925 48940 48941 48966 48983 48986 48987 48993 48994 48995 49024 49025 49026 49032 49034 49055 49077 49078 49079 49081 49083 490914.414320678087048e-20 1.4134638842407062e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/219/39?format=asciiInfraredOpticaldefaultJ/ApJS/219/39/master*Master quasar catalog (table 1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainindexedCLink to photometry details for this QSO candidatemeta.ref.urlintnullableRun[94/8162] SDSS run number (1)meta.id;meta.mainintRerun[301] SDSS rerun numbermeta.id;obsintCamcol[1/6] SDSS camera columnmeta.id;instrintField[11/999] SDSS field numbermeta.id;obs.fieldintID[1/8138] SDSS ID number within the fieldmeta.id;obs.fieldintOT[3/6] SDSS object type (stellar=3, extended=6) (OBJC_TYPE)src.classintFlagsSDSS object flags (OBJC_FLAGS) (2)meta.code.errorFlags2SDSS object flags (OBJC_FLAGS2)meta.code.errorlongAu[0.01/6.2] Magnitudes of Galactic extinction in u-band (EXTINCTION_U)magphys.absorptionfloatAg[0.009/4.6] Magnitudes of Galactic extinction in g-band (EXTINCTION_G)magphys.absorptionfloatAr[0.006/3.3] Magnitudes of Galactic extinction in r-band (EXTINCTION_R)magphys.absorptionfloatAi[0.005/2.5] Magnitudes of Galactic extinction in i-band (EXTINCTION_I)magphys.absorptionfloatzBest8[0.03/5.9]?=0 Eighth zBest value (ZBEST8)src.redshift.photfloatnullableAz[0.003/1.8] Magnitudes of Galactic extinction in i-band (EXTINCTION_Z)magphys.absorptionfloatFupsf[-27.7/2882.1] PSF flux in u-band (PSFFLUX_U)phot.mag;em.opt.UfloatFgpsf[-10.9/8313] PSF flux in g-band (PSFFLUX_G)phot.mag;em.opt.BfloatFrpsf[-0.6/11314.1] PSF flux in r-band (PSFFLUX_R)phot.mag;em.opt.RfloatFipsf[-31.1/12356.4] PSF flux in i-band (PSFFLUX_I)phot.mag;em.opt.IfloatFzpsf[-2.1/12640.6] PSF flux in z-band (PSFFLUX_Z)phot.mag;em.opt.IfloatIVFu[0/232.2] Inverse variance of point-spread function flux in u-band (PSFFLUX_IVAR_U)phot.mag;em.opt.UfloatIVFg[0/645.8] Inverse variance of point-spread function flux in g-band (PSFFLUX_IVAR_G)phot.mag;em.opt.BfloatIVFr[0/307.8] Inverse variance of point-spread function flux in r-band (PSFFLUX_IVAR_R)phot.mag;em.opt.RfloatIVFi[0/106.8] Inverse variance of point-spread function flux in i-band (PSFFLUX_IVAR_I)phot.mag;em.opt.IfloatIVFz[0/8] Inverse variance of point-spread function flux in z-band (PSFFLUX_IVAR_Z)phot.mag;em.opt.IfloatCoAFu[-6.5/2882.1]?=-9999 Co-added point-spread function flux in u-band (PSFFLUX_CLEAN_U)phot.mag;em.opt.UfloatnullableCoAFg[-11/8313]?=-9999 Co-added point-spread function flux in g-band (PSFFLUX_CLEAN_G)phot.mag;em.opt.BfloatnullableCoAFr[-3/11314.1]?=-9999 Co-added point-spread function flux in r-band (PSFFLUX_CLEAN_R)phot.mag;em.opt.RfloatnullableCoAFi[-4.4/12356.4]?=-9999 Co-added point-spread function flux in i-band (PSFFLUX_CLEAN_I)phot.mag;em.opt.IfloatnullableCoAFz[-19.8/12640.6]?=-9999 Co-added point-spread function flux in z-band (PSFFLUX_CLEAN_Z)phot.mag;em.opt.IfloatnullableIVCoAFu[0/722.2] Inverse variance of co-added point-spread function flux in u-band (PSFFLUX_CLEAN_IVAR_U)phot.mag;em.opt.UfloatIVCoAFg[0/2902] Inverse variance of co-added point-spread function flux in g-band (PSFFLUX_CLEAN_IVAR_G)phot.mag;em.opt.BfloatIVCoAFr[0/1215.2] Inverse variance of co-added point-spread function flux in r-band (PSFFLUX_CLEAN_IVAR_R)phot.mag;em.opt.RfloatIVCoAFi[0/579.1] Inverse variance of co-added point-spread function flux in i-band (PSFFLUX_CLEAN_IVAR_I)phot.mag;em.opt.IfloatIVCoAFz[0/36] Inverse variance of co-added point-spread function flux in z-band (PSFFLUX_CLEAN_IVAR_Z)phot.mag;em.opt.Ifloatf_CoAFu[0/35] Flag indicating whether co-added (CLEAN) flux should be used (PSF_CLEAN_NUSE_U)meta.codeintf_CoAFg[0/35] Flag indicating whether co-added (CLEAN) flux should be used (PSF_CLEAN_NUSE_G)meta.codeintf_CoAFr[0/35] Flag indicating whether co-added (CLEAN) flux should be used (PSF_CLEAN_NUSE_R)meta.codeintf_CoAFi[0/35] Flag indicating whether co-added (CLEAN) flux should be used (PSF_CLEAN_NUSE_I)meta.codeintf_CoAFz[0/35] Flag indicating whether co-added (CLEAN) flux should be used (PSF_CLEAN_NUSE_Z)meta.codeintzBest1[0.06/5.5]?=0 First zBest value (ZBEST1)src.redshift.photfloatnullablezBest2[0.1/3.6]?=0 Second zBest value (ZBEST2)src.redshift.photfloatnullablezBest3[0.06/4.9]?=0 Third zBest value (ZBEST3)src.redshift.photfloatnullablezBest4[0.1/5.2]?=0 Fourth zBest value (ZBEST4)src.redshift.photfloatnullablezBest5[-8/5]?=0 Fifth zBest value (ZBEST5)src.redshift.photfloatnullablezBest6[0.1/4.2]?=0 Sixth zBest value (ZBEST6)src.redshift.photfloatnullablezBest7[5.7/6.5]?=0 Seventh zBest value (ZBEST7)src.redshift.photfloatnullablezBest9[0.1/3.9]?=0 Ninth zBest value (ZBEST9)src.redshift.photfloatnullablezBest10[-1/6.3]?=0 Tenth zBest value (ZBEST10)src.redshift.photfloatnullablezBest11[0.3/5.5]?=0 Eleventh zBest value (ZBEST11)src.redshift.photfloatnullablezBest12[0.07/3.6]?=0 Twelfth zBest value (ZBEST12)src.redshift.photfloatnullablezBest13[3.8/5.1]?=0 Thirteenth zBest value (ZBEST13)src.redshift.photfloatnullablezBest14[0.1/4.2]?=0 Fourtheenth zBest value (ZBEST14)src.redshift.photfloatnullabler_zBest[1/10113] Redshift source flag (SOURCEBIT) (3)meta.ref;pos.frameintUni[0/1] Indicates whether the SDSS object fell in the "uniform" selection area (SDSS_UNIFORM) (4)meta.codeintQSO[0/1] AGES flag (AGES_QSO) (5)meta.codeintCode06[-782208/786384] AGES flag (AGES_CODE06) (5)meta.codeintzphlo[-1/6] Minimum photometric redshift (KDE_ZPHOTLO) (6)src.redshift.photfloatzphhi[-1/6.5] Maximum photometric redshift (KDE_ZPHOTHI) (6)src.redshift.photfloatzphP[-1/1] Photometric redshift probability (6) (KDE_ZPHOTPROB)stat.fit.goodnessfloatUV?[0/1] Flag indicating a UV-excess or low-redshift source (KDE_LOWZORUVX) (6)meta.codeintzpkP[0/1] Peak of the redshift probability (XDQSOZ_PEAKPROB) (7)stat.fit.goodnessfloatzpkFWHM[0/3.2] FWHM of the redshift peak (7) (XDQSOZ_PEAKFWHM)stat.errorfloatNpk[0/8] Number of peaks in photo-z distribution (XDQSOZ_NPEAKS) (7)meta.numberintSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlcharJ/ApJS/219/39/cand*Optical+MIR photometric quasar candidates catalog (table 2)e_FUV[0.008/0.6]? Error in FUV magnitudemagstat.errorfloatnullablezphIRP[0.2/1]? Probability of ZPHOTBESTJHK being between min and max (ZPHOTPROBJHK)stat.fit.goodnessfloatnullableLeg[0/1] Indicates if object is in the SDSS Legacy footprintmeta.codeintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000Declination (J2000)degpos.eq.dec;meta.mainindexedClassSpectral classification (QSO, GALAXY, STAR, CELG, ??, or U) (1)src.classcharzsp[0/6.7]? Spectroscopic redshiftsrc.redshiftdoublenullableumag[15/31.7] SDSS u-band AB magnitude, corrected for Galactic extinctionmagphot.mag;em.opt.Ufloate_umag[0.003/99.99]? Error on u-band magnitudemagstat.error;phot.mag;em.opt.Ufloatnullablegmag[15/27.4] SDSS g-band AB magnitude, corrected for Galactic extinctionmagphot.mag;em.opt.Bfloate_gmag[0.003/44] Error on g-band magnitudemagstat.error;phot.mag;em.opt.Bfloatrmag[15/25.9] SDSS r-band AB magnitude, corrected for Galactic extinctionmagphot.mag;em.opt.Rfloate_rmag[0.002/18] Error on r-band magnitudemagstat.error;phot.mag;em.opt.Rfloatimag[14.9/25] SDSS i-band AB magnitude, corrected for Galactic extinctionmagphot.mag;em.opt.Ifloate_imag[0.002/21] Error on i-band magnitudemagstat.error;phot.mag;em.opt.Ifloatzmag[15/24.5] SDSS z-band AB magnitude, corrected for Galactic extinctionmagphot.mag;em.opt.Ifloate_zmag[0.003/16] Error on z-band magnitudemagstat.error;phot.mag;em.opt.Ifloat3.6mag[12.8/23.8] 3.6um AB magnitude, corrected for Galactic extinctionmagphot.mag;em.IR.3-4umfloate_3.6mag[0.02/0.7] Error on 3.6um magnitudemagstat.errorfloat4.5mag[12.5/24.2] 4.5um AB magnitude, corrected for Galactic extinctionmagphot.mag;em.IR.4-8umfloate_4.5mag[0.01/0.7] Error on 4.5um magnitudemagstat.errorfloatFu[-101/810] SDSS u-band flux density in nanomaggies3.63uJyphot.mag;em.opt.Ufloate_Fu[0.04/100] Error in u-band flux density3.63uJystat.errorfloatFg[-1/759] SDSS g-band flux density in nanomaggies3.63uJyphot.mag;em.opt.Bfloate_Fg[0.02/54] Error in g-band flux density3.63uJystat.errorfloatFr[-0.3/805] SDSS r-band flux density in nanomaggies3.63uJyphot.mag;em.opt.Rfloate_Fr[0.03/86] Error in r-band flux density3.63uJystat.errorfloatFi[-0.3/979] SDSS i-band flux density in nanomaggies3.63uJyphot.mag;em.opt.Ifloate_Fi[0.04/163] Error in i-band flux density3.63uJystat.errorfloatFz[-4/945] SDSS z-band flux density in nanomaggies3.63uJyphot.mag;em.opt.Ifloate_Fz[0.1/129] Error in z-band flux density3.63uJystat.errorfloatF3.6[1.1/25966] 3.6um flux density in microJyuJyphot.mag;em.IR.3-4umdoublee_F3.6[0.09/551] Error in 3.6um flux densityuJystat.errorfloatF4.5[0.8/35613] 4.5um flux density in microJyuJyphot.mag;em.IR.4-8umdoublee_F4.5[0.1/656] Error in 4.5um flux densityuJystat.errorfloatYmag[14.6/26]? Y-band Vega magnitude from UKIDSS or VHS (2)magphot.mag;em.IR.Jfloatnullablee_Ymag[0.003/46]? Error in Y-band magnitudemagstat.error;phot.mag;em.opt.BfloatnullableJmag[13.9/21]? J-band Vega magnitude from UKIDSS or VHS (2)magphot.mag;em.IR.Jfloatnullablee_Jmag[0.002/0.5]? Error in J-band magnitudemagstat.error;phot.mag;em.IR.JfloatnullableHmag[13.2/20.3]? H-band Vega magnitude from UKIDSS or VHS (2)magphot.mag;em.IR.Hfloatnullablee_Hmag[0.002/0.6]? Error in H-band magnitudemagstat.error;phot.mag;em.IR.HfloatnullableKmag[11.8/19.6]? K-band Vega magnitude from UKIDSS or VHS (2)magphot.mag;em.IR.Kfloatnullablee_Kmag[0.001/0.7]? Error in K-band magnitudemagstat.error;phot.mag;em.IR.KfloatnullableFUV[13.7/24.8]? GALEX FUV magnitude (AB)magphot.mag;em.UV.100-200nmfloatnullableNUV[13.8/24.8]? GALEX NUV magnitude (AB)magphot.mag;em.UVfloatnullablee_NUV[0.004/0.5]? Error in NUV magnitudemagstat.errorfloatnullablegisig[-1/1]? Indicator of distance from mean g-i color at ZHOTBEST (GI_SIGMA)stat.fit.paramfloatnullableAu[0.01/1] Extinction in SDSS u bandmagphys.absorptionfloatden*[0/1.2] Star density from KDE algorithmstat.fit.paramfloatdenq[0/402] Quasar density from KDE algorithmstat.fit.paramfloatb_zphO[0/100] Minimum photometric redshift [ugriz]src.redshift.phot;stat.minfloatzphO[0.005/100] Best photometric redshift [ugriz] (ZPHOTBEST)src.redshift.photfloatB_zphO[0.01/100] Maximum photometric redshift [ugriz]src.redshift.phot;stat.maxfloatzphOP[0.005/100] Probability of ZPHOTBEST being between min and max (ZPHOTPROB)stat.fit.goodnessfloatb_zphIR[0/6]? Minimum photometric redshift [ugrizJHK]src.redshift.phot;stat.minfloatnullablezphIR[0.05/6.3]? Best photometric redshift (ugrizJHK) (ZPHOTBESTJHK)src.redshift.photfloatnullableB_zphIR[0.02/6.3]? Maximum photometric redshift (ugrizJHK) (ZPHOTMAXJHK)src.redshift.phot;stat.maxfloatnullableUni[0/1] Indicates if object was selected according to Richards et al. (2002AJ....123.2945R)meta.codeintPrim[0/673192456] SDSS primary target selection flag; see Richards et al. (2002AJ....123.2945R)meta.codelongpm[0.005/193]? Proper motion in milliarcseconds per yearmas/yrpos.pmfloatnullableDB[1/7] Bitwise flag indicating low-z (2^0^), mid-z (2^1^), and high-z (2^2^) sourcesmeta.codeintSloanDisplay the online SDSS data for the nearest objectmeta.ref.urlchar