J/ApJ/690/644ivo://CDS.VizieR/J/ApJ/690/644doi:10.26093/cds/vizier.16900644CDSGreen P.J.Aldcroft T.L.Richards G.T.Barkhouse W.A.Constantin A.,Haggard D.Karovska M.Kim D.-W.Kim M.Vikhlinin A.Anderson S.F.,Mossman A.Kashyap V.Myers A.C.Silverman J.D.Wilkes B.J.,Tananbaum H.2017-10-11T05:13:22Z2011-02-24T08:40:42ZCDS support team

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

cds-question@unistra.frvisible-astronomysloan-photometryquasarsx-ray-sourcessurveysredshiftedWe study the spectral energy distributions and evolution of a large sample of optically selected quasars from the Sloan Digital Sky Survey that were observed in 323 Chandra images analyzed by the Chandra Multiwavelength Project. Our highest-confidence matched sample includes 1135 X-ray detected quasars in the redshift range 0.2<z<5.4, representing some 36Msec of effective exposure. We provide catalogs of QSO properties, and describe our novel method of calculating X-ray flux upper limits and effective sky coverage. Spectroscopic redshifts are available for about 1/3 of the detected sample; elsewhere, redshifts are estimated photometrically. We detect 56 QSOs with redshift z>3, substantially expanding the known sample. We find no evidence for evolution out to z~5 for either the X-ray photon index {Gamma} or for the ratio of optical/UV to X-ray flux {alpha}_ox_.2009ApJ...690..644Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/690/644CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)J/ApJS/150/19 : ChaMP. I. First X-ray source catalog (Kim+, 2004)J/ApJS/155/73 : Photometric redshifts of X-ray sources in CDF-S (Zheng+, 2004)J/A+A/434/475 : Redshifts for X-ray selected AGNs (Kitsionas+, 2005)J/ApJ/618/123 : Hard X-ray-emitting AGNs (Silverman+, 2005)J/ApJS/169/401 : ChaMP X-ray point source catalog (Kim+, 2007)J/AJ/133/313 : AGN from RASS and SDSS DR5 (Anderson+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/690/644https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/690/644http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/690/644https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/690/644https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/690/644http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/690/644GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/690/644/table2 (Properties of SDSS quasars detected by Chandra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/690/644/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/690/644/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/690/644/table2?GETtext/xml+votable180.050000true0.508320.7612750.005555555555555556Cone search capability for table J/ApJ/690/644/table3 (Properties of SDSS quasars with Chandra limits)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/690/644/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/690/644/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/690/644/table3?GETtext/xml+votable180.050000true0.563370.90942890.0055555555555555566/0 522 4159 4168 4169 4245 4285 4406 4407 4512 4615 4708 4710 4759 4765 4808 4897 4900 4923 4924 4955 4964 4976 4977 5027 5067 5069 5074 5089 5090 5111 5164 5165 5299 5305 5306 5307 5437 5438 5439 5538 5569 5609 5664 5666 5731 5780 5781 5794 5842 5843 5848 5881 5884 5886 5906 5923 5925 5930 5975 5985 5999 6069 6071 6219 6233 6252 6253 6427 6441 6448 6495 6499 6539 6541 6552 6554 6559 6579 6581 6585 6645 6647 7178 7220 7222 7242 7261 7263 7273 7278 7279 7280 7281 7301 7303 7308 7309 7311 7326 7327 7345 7371 7378 7444 7459 7464 7475 7478 7508 7510 7604 8288 8420 8458 8555 8558 8644 8659 8665 8673 8675 8681 8707 8713 8715 8788 8845 8908 8909 8920 8921 8947 8950 8969 8972 9036 9037 9039 9163 9181 9185 9272 9363 9366 9367 9373 9401 9443 9466 9468 9469 9615 9618 9632 9633 9770 9776 9831 9837 9848 9855 9879 9885 10072 10193 10221 10222 10245 10302 10364 10386 10387 10411 10454 10471 10475 10515 10521 10529 10544 10601 10604 10605 10607 10618 10656 10658 10692 10694 10706 10707 10734 10743 10759 10822 10823 10843 10877 10879 10936 10938 10963 10968 10969 10970 10992 11042 11043 11048 11050 11073 11101 11130 11179 11191 11194 11204 11206 11299 11319 11339 11342 11347 11361 11364 11374 11426 11427 11428 11460 11488 11489 11589 11590 11652 11791 11802 12553 12556 17237 17239 17406 17497 17499 17502 17742 17769 17812 17813 17815 17819 17829 17840 17841 17920 17997 18001 18003 18022 18024 18025 18032 18034 18061 18075 18076 18086 18088 18089 18534 18627 18772 18774 18775 18780 18782 18795 19032 19033 19036 19456 19457 19458 19676 19842 22364 23148 23182 23192 23201 25595 25853 25919 25927 25934 25938 25942 25944 25945 25948 25950 25956 25958 25969 25972 25977 25981 25983 25990 26005 26020 26022 26177 26180 26189 26196 26199 26200 26203 26204 26205 26206 26213 26215 26217 26221 26225 26239 26255 26271 26276 26277 26280 26281 26285 26292 26293 26295 26298 26304 26305 26338 26425 26427 26555 26561 26563 26568 26951 26956 26967 26968 26972 26983 26990 26991 26995 27053 27073 27075 27093 27095 27126 27127 27224 27287 27318 27476 27487 27511 27530 27552 27580 27617 27652 27664 27729 27732 27733 27756 27762 27865 27867 27868 27921 27936 27938 27942 27954 28019 28086 28126 28127 28138 28174 28221 28226 28290 28291 28356 28359 28365 28370 28376 28377 28479 28483 28488 28489 28490 28512 28535 28569 28570 28574 28581 28592 28632 28634 31379 31627 31730 32500 36792 490129.276497240453405e-25 9.276497240453405e-25https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/690/644?format=asciiX-rayOpticaldefaultJ/ApJ/690/644/table2Properties of SDSS quasars detected by ChandraSloanDisplay the SDSS data for this quasarmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObjIDSDSS-DR6 ObjIDmeta.idcharimagSDSS i band PSF magnitude (dereddened)magphot.mag;em.opt.IfloatzphPhotometric redshiftsrc.redshift.photfloatpr(zph)[0,1] Photometric redshift probabilitystat.fit.goodnessfloatzph0Photometric redshift lower limitsrc.redshift.photfloatzph1Photometric redshift upper limitsrc.redshift.photfloatzbestBest redshiftsrc.redshift.photfloatr_zbest? Reference if spectroscopic redshift (G1)meta.ref;pos.framecharCXOMPChaMP X-ray source name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharChaMPidInternal ChaMP source ID (2)meta.id;obscharOAAChandra off-axis anglearcmininstr.offsetfloatXctNet counts in the 0.3-8keV rangectphot.count;em.X-rayfloate_XctRMS uncertainty on Xctstat.errorfloatExpVignetting-corrected exposure timekstime.duration;obs.exposurefloatnHgalGalactic absorbing HI column density1e+20cm**-2phys.columnDensityfloatnHintr? Best fit intrinsic absorbing HI column density1e+22cm**-2phys.columnDensityfloatnullablenHup? 90% upper error limit on nHintr1e+22cm**-2phys.columnDensityfloatnullablenHlo? 90% lower error limit on nHintr1e+22cm**-2phys.columnDensityfloatnullableGamX-ray photon energy index {Gamma}spect.indexfloatGam.up90% lower error limit on {Gamma}spect.indexfloatGam.lo90% lower error limit on {Gamma}spect.indexfloatFxb0.5-8keV flux in erg/cm2/s (log10)log(mW.m**-2)phot.flux;em.X-rayfloatlogLx2keV luminosity in erg/s (log10)log(1e-07W)phys.luminosity;em.X-rayfloatlogL25002500{AA} luminosity in erg/s (log10)log(1e-07W)phys.luminosityfloataoxOptical/X-ray Spectral index (G3)phys.luminosity;arith.ratiofloatF20cm? 1.4GHz FIRST radio flux density (3)mJyphot.flux.density;em.radio.750-1500MHzfloatnullablen_F20cm[0/1] 1 if multiple/extended radio morphologymeta.noteintRLRadio loudness (G4)magphot.flux;arith.ratiofloatCl[0/3] Spectral classification (G5)src.classintTarget[0/1] is source a Chandra PI target?meta.noteintCommCommentsmeta.notecharChaMPDisplay the ChaMP X-ray point source catalog (Kim et al. 2007, Cat. J/ApJS/169/401)meta.ref.urlcharDR7QDisplay the SDSS-DR7 quasar catalog (Schneider et al. 2010, Cat. VII/260)meta.ref.urlcharDR6Details from SDSS-DR6 (Adelman-McCarthy+, 2007, Cat. II/282meta.ref.urlcharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDScharRAJ2000SDSS source right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000SDSS source declination (J2000)degpos.eq.dec;meta.mainJ/ApJ/690/644/table3Properties of SDSS quasars with Chandra limitsObjIDSDSS-DR6 ObjIDmeta.idcharDEJ2000SDSS source declination (J2000)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000SDSS source right ascension (J2000)degpos.eq.ra;meta.mainimagSDSS i band PSF magnitude (dereddened)magphot.mag;em.opt.IfloatzphPhotometric redshiftsrc.redshift.photfloatpr(zph)Photometric redshift probabilitystat.fit.goodnessfloatzph0Photometric redshift lower limitsrc.redshift.photfloatzph1Photometric redshift upper limitsrc.redshift.photfloatzbestBest redshift (G1)src.redshift.photfloatr_zbest[S ] Reference if spectroscopic redshift (G1)meta.ref;pos.framecharObsIDChandra observation IDmeta.id;obsintccdidACIS CCD IDmeta.id;instr.detintOAAChandra off-axis anglearcmininstr.offsetfloatXlim90% Counts upper limit the 0.3-8keV range (1)ctphot.count;em.X-rayfloatExpVignetting-corrected exposure timekstime.duration;obs.exposurefloatnHgalGalactic absorbing HI column density (G2)1e+20cm**-2phys.columnDensity;pos.galacticfloatFxbUpper limit 0.5-8keV flux in erg/cm2/s (log10)log(mW.m**-2)phot.flux;em.X-rayfloatlogLxupper limit 2keV luminosity in erg/s (log10)log(1e-07W)phys.luminosity;em.X-rayfloatlogL25002500{AA} luminosity in erg/s (log10)log(1e-07W)phys.luminosityfloataoxLower limit to optical/X spectral index (G3)phys.luminosity;arith.ratiofloatF20cm? 1.4GHz integrated flux density from FIRSTmJyphot.flux.density;em.radio.750-1500MHzfloatnullableRLRadio loudness (G4)magphot.flux;arith.ratiofloatCl[0,3] Spectral classification (G5)src.classintCommCommentsmeta.notecharDR7QDisplay the SDSS-DR7 quasar catalog (Schneider et al. 2010, Cat. VII/260)meta.ref.urlcharDR6Details from SDSS-DR6 (Adelman-McCarthy+, 2007, Cat. II/282meta.ref.urlcharSloanDisplay the SDSS data for this quasarmeta.ref.urlcharSimbadNameSimbad column added by the CDSmeta.idcharNEDSimbad column added by the CDSchar