J/ApJ/753/106ivo://CDS.VizieR/J/ApJ/753/106doi:10.26093/cds/vizier.17530106CDSMacLeod C.L.Ivezic Z.Sesar B.de Vries W.Kochanek C.S.Kelly B.C.,Becker A.C.Lupton R.H.Hall P.B.Richards G.T.Anderson S.F.,Schneider D.P.2022-11-03T08:04:06Z2022-03-11T09:43:08ZCDS support team

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

cds-question@unistra.frquasarsvisible-astronomysloan-photometrysurveysWe provide a quantitative description and statistical interpretation of the optical continuum variability of quasars. The Sloan Digital Sky Survey (SDSS) has obtained repeated imaging in five UV-to-IR photometric bands for 33,881 spectroscopically confirmed quasars. About 10,000 quasars have an average of 60 observations in each band obtained over a decade along Stripe 82 (S82), whereas the remaining ~25,000 have 2-3 observations due to scan overlaps. The observed time lags span the range from a day to almost 10 years, and constrain quasar variability at rest-frame time lags of up to 4 years, and at rest-frame wavelengths from 1000{AA} to 6000{AA}. We publicly release a user-friendly catalog of quasars from the SDSS Data Release 7 that have been observed at least twice in SDSS or once in both SDSS and the Palomar Observatory Sky Survey, and we use it to analyze the ensemble properties of quasar variability. Based on a damped random walk (DRW) model defined by a characteristic timescale and an asymptotic variability amplitude that scale with the luminosity, black hole mass, and rest wavelength for individual quasars calibrated in S82, we can fully explain the ensemble variability statistics of the non-S82 quasars such as the exponential distribution of large magnitude changes. All available data are consistent with the DRW model as a viable description of the optical continuum variability of quasars on timescales of ~5-2000 days in the rest frame. We use these models to predict the incidence of quasar contamination in transient surveys such as those from the Palomar Transient Factory and Large Synoptic Survey Telescope.2012ApJ...753..106Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/753/106CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/266 : QUEST1 200k light curve catalog (Rengstorf+, 2004)VII/252 : SDSS-DR5 quasar catalog (Schneider+, 2007)VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)J/MNRAS/268/305 : Variability of optically selected quasars (Hook+ 1994)J/MNRAS/275/1102 : Evolution of quasar luminosity function (Hawkins+ 1995)J/ApJ/633/638 : Variable quasar sample from SDSS (Wilhite+, 2005)J/AJ/131/1923 : Known QSOs in the QUEST Variability Survey (Rengstorf+, 2006)J/AJ/131/2766 : Quasar luminosity function from SDSS-DR3 (Richards+, 2006)J/ApJ/680/169 : SDSS DR5 virial black hole masses (Shen+, 2008)J/ApJ/698/895 : Variations in QSOs optical flux (Kelly+, 2009)J/ApJ/701/508 : 5000 AGNs behind the Magellanic clouds (Kozlowski+, 2009)J/ApJ/716/530 : Mid-IR variability from the SDWFS (Kozlowski+, 2010)J/A+A/525/A37 : Variability indexes of QSOs in SDSS S82 (Meusinger+, 2011)J/ApJ/728/26 : QSO selection based on photometric variability (Macleod+, 2011)J/ApJS/194/22 : Magellanic Quasars Survey: QSOs behind SMC (Kozlowski+, 2011)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJ/746/27 : Magellanic QSOs Survey. II. AGNs behind LMC (Kozlowski+, 2012)J/ApJ/794/120 : Sloan Digital Sky Survey coadd. Stripe 82 (Annis+, 2014)J/ApJ/814/150 : Variability of SDSS broad absorption line QSOs (Wang+, 2015)J/ApJ/854/160 : SDSS & DES long-term extreme variability QSOs (Rumbaugh+, 2018)J/ApJ/900/58 : Opt-IR LC compilation of DES Stripe 82 quasars (Yang+, 2020)http://faculty.washington.edu/ivezic/macleod/qso_dr7/ : QSO time variabilityhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/753/106https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/753/106http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/753/106https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/753/106https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/753/106http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/753/106GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/753/106/northcat (*Master Norhtern catalog of quasars with at least two photometric observations (master_2obsDR7.dat ))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/106/northcat?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/106/northcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/106/northcat?GETtext/xml+votable180.050000true0.027228060.515341110.005555555555555556Cone search capability for table J/ApJ/753/106/southcat (SDSS S82 spectroscopically confirmed quasars; selected data (DB_QSO_S82.dat))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/106/southcat?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/106/southcat?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/106/southcat?GETtext/xml+votable180.050000true2.169301941.238648890.005555555555555556Cone search capability for table J/ApJ/753/106/sdssposs (All SDSS DR7 quasars with DPOSS observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/753/106/sdssposs?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/106/sdssposs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/106/sdssposs?GETtext/xml+votable180.050000true7.25592913.7944050.0055555555555555562/19-22 32 34-35 38 40-41 43 103 108-109 111 3/64 71-73 75 92 94-95 100-101 112-113 116 132-134 144 147 168-169 171 176-178 184 407 423 427-430 440-441 443 494 4/260-262 264 266-267 270-271 277-279 281-283 296-297 299 373-375 388-389 391 399 408-409 411-413 415 456-457 459-461 463 469 472 540-542 580 582-583 585-587 592 600 602 624 680-682 716 718 744-746 1621-1623 1625-1627 1637-1639 1641-1642 1644-1645 1647 1685 1687 1691 1703 1707 1724 1768-1769 1771 1961-1962 1965-1967 1980 1982-1983 2027 5/136 138 1052-1054 1060-1062 1073-1077 1079 1088-1090 1092 1096 1102-1104 1107 1121-1123 1192-1193 1195 1488-1490 1540-1541 1549 1560-1561 1563 1585 1640-1642 1656-1658 1832-1834 1848-1850 1872-1873 1875 1880-1881 1896-1897 1900-1901 2172-2173 2175 2325 2327 2336-2338 2376 2378-2379 2404 2504 2506 2518 2521 2523-2524 2526 2528 2530 2536 2547-2548 2550 2553 2555 2732-2734 2868 2870 2876 2897-2899 2960 2962-2963 2968 2970 2988 3095 3137-3138 4307 4313 4351 4437-4438 4441-4442 4444 4452-4454 4457-4458 4501-4502 4505-4506 4516-4518 4521-4523 4544 4575 4596-4598 4601-4602 4651 4656 4687 4693-4694 4696-4698 4709-4710 4713-4714 4737 4757-4758 4761-4762 4773-4774 4777-4778 4780 4831 4845-4847 4851-4854 4856 4917-4919 4921-4923 4933-4935 4937-4940 4960 4997-4998 5000-5002 5461 5463 5469 5471 5493 5501-5503 5588-5589 5591 5597 5786 5797-5799 5801-5802 6399 6462-6463 6479 6483 6498-6499 6541 6543 6545-6547 6563 6572-6574 6584-6585 6587 6737 6739 6744-6745 6747 6757-6759 6761-6763 6805-6807 6809-6811 6821-6823 6825-6827 6900-6902 6904 7081-7083 7509-7510 7786 7823 7829-7830 7833-7834 7843 7853 7855-7856 7858-7859 7882-7883 7886 7924 7926 8102-8103 8105 8107 8114 8120 8122 8125 8127 8170 9194-9195 11263 6/0-2 4 25 64 521 523-524 526-527 548-550 556 640 908 920 1014 2093 2205 4221-4223 4252-4253 4255 4288-4290 4312-4314 4364-4366 4372 4374-4375 4378-4379 4381-4382 4389-4394 4396 4398-4400 4403 4405-4407 4420 4424 4427 4480-4482 5964 5966-5967 6148-6149 6172-6173 6205 6248-6249 6337 6352-6353 6356-6357 6359 6362 6365 6367 6372-6373 6375 6572 6574-6575 6636-6637 6639 6739-6742 6912-6913 6916 6932 6993 6996-6997 7340-7341 7343 7404-7405 7407 7496 7498 7528-7530 7532-7533 7536-7538 7540 7568-7570 7572-7573 7582-7583 7592-7593 7595-7597 7608-7609 7680-7681 7684-7685 7696-7697 7700 7779 7848 8696-8698 9297 9306-9307 9356-9357 9359 9488-9489 9508-9510 9520 9522 9528 9530 9535 9576 9578 9621 9623-9624 9626 9629 9648 9650 9656 9658 10020-10022 10028 10061-10063 10067 10116 10118 10124 10152-10154 10181-10183 10187 10209 10211 10217 10219 10224-10226 10232 10234-10235 10238 10940-10941 10943 11476-11478 11484 11486 11508 11512 11514 11520 11522 11528 11573 11575 11585-11587 11600-11602 11604 11608 11610 11616-11617 11844 11846 11858 11876-11878 11956 11960 11968-11970 12288-12290 12375 12391 12397 12400 12409 12536 12545-12547 12556-12557 12560-12561 12563-12564 12576 13332 13420 15919 16272 16280 16295 16891 16894 17213 17215 17234-17235 17239 17242 17248-17249 17251 17257 17259-17262 17297 17300 17302 17304 17318 17323-17324 17345 17470-17471 17497 17499 17509-17512 17514 17518 17521 17556 17561-17563 17570 17573 17575 17577 17579 17601 17659 17661-17666 17668 17723 17725-17727 17741-17743 17745-17747 17756-17758 17761-17763 17772-17774 17805-17807 17820-17822 17825-17827 17836-17838 17840-17842 17848 17856-17858 17860 17904 17906 17920 17981-17983 17997-17999 18001-18003 18012-18014 18017-18019 18028-18030 18032-18034 18061-18063 18076-18078 18081-18083 18096-18098 18112-18114 18293-18295 18299 18365-18367 18375 18381-18383 18396 18398 18401-18403 18412-18414 18416-18418 18511 18518-18519 18521-18522 18531-18532 18534 18536 18542 18544 18583 18589 18591 18597-18599 18601 18603 18608 18610-18611 18616-18618 18634 18685-18687 18763 18765-18767 18769-18771 18780-18782 18796-18798 18800-18802 18804 18808 18829-18831 18833-18835 18844-18846 18849-18851 18860-18862 18864-18866 18868 18880-18882 18927 18945-18947 18952 18955-18956 18960 18978 19003 19005-19007 19021-19023 19025-19027 19036-19038 19041-19043 19052-19054 19056-19058 19085-19087 19089-19091 19100-19102 19105-19107 19116-19118 19136-19138 19200-19202 19280 19319 19322-19323 19374-19375 19379 19397-19399 19401-19403 19420 19428-19430 19432 19456-19458 19464 19525 19583 19590 19596-19598 19647 19663 19665 19667 19681 19683 19696-19698 19700 19704 19725 19727 19729-19731 19745 19747 19764 19768 19776-19778 19844 19979 19981-19983 19985-19987 19996-19998 20012-20013 20016-20018 20032-20034 20036 20096 20171 20474 20478 21769 21843 21848-21849 21851 21857 21859 21863 21865 21867-21869 21873 21909 21959 21964-21966 21968-21970 21976 21981 21983 21991 21997-21999 22001-22003 22341 22349 22351 22360-22361 22363 22384-22385 22396-22397 22399 22485 22516 22715 22717 22762 23047 23049 23054-23056 23062 23065 23073-23074 23099 23101-23103 23138-23139 23150 23181-23183 23185-23187 23201-23203 23212-23214 23216-23218 23231-23234 23240 23272 23274 23278 23342 23530 25517 25565 25589-25591 25593-25595 25821 25843 25845-25847 25887 25907 25909-25911 25913-25915 25925-25927 25929-25931 25985-25987 25989-25991 26112 26121 26161-26163 26169-26170 26243 26245-26247 26249-26251 26300-26302 26344-26345 26347 26877-26879 26910 26933 26941-26943 26945-26947 26953-26955 26985-26987 27021-27023 27025-27027 27041-27043 27197-27199 27213-27215 27217-27219 27233-27235 27277-27279 27281-27283 27297-27299 27612-27613 27615 27620-27622 27624-27625 27628 27630-27631 27633-27635 27637-27638 27640-27642 27645 27647 28320-28321 28323 30029-30031 30033-30035 30044-30046 30053 30064-30066 30068 30975 31138-31139 31289-31291 31309 31311 31315 31324 31329-31331 31340 31342 31344-31345 31353-31355 31357-31359 31365-31367 31369-31371 31408-31410 31417-31419 31429-31431 31488 31522 31550-31551 31594 31598-31599 31611 31700 31710 32098 32391 32397-32399 32402-32403 32406-32407 32425-32427 32460 32462 32478-32479 32484 32486 32492 32494-32495 32497 32499 32505 32650 32672 32674 32684 32686 32696-32698 36607 36726-36727 36729 36732-36734 36763 36765-36766 36774-36775 36785-36788 36790 36792-36794 36796 36805 36807 36816 36861-36863 40959 45043 45045-45047 45049-45051 48989 48991 49007 49009-49010 49012 49014 49016-49017 49021 49085 49094 49098 49100 49120-49122 49124 49149-491519.932213363424795e-25 6.090060298487514e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/753/106?format=asciiOpticaldefaultJ/ApJ/753/106/northcat*Master Norhtern catalog of quasars with at least two photometric observations (master_2obsDR7.dat )z[0.08/5.5] Redshiftsrc.redshiftfloatSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharrecnoRecord 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.mainindexedumag[15.5/26.8]? BEST SDSS u band PSF AB magnitude (G2)magphot.mag;em.opt.Ufloatnullablee_umag[0.009/5.5]? Error in umagmagstat.error;phot.magfloatnullablegmag[15.4/26.5]? BEST SDSS g band PSF AB magnitude (G2)magphot.mag;em.opt.Bfloatnullablee_gmag[0.004/1.5]? Error in gmagmagstat.error;phot.magfloatnullablermag[15.2/22.6]? BEST SDSS r band PSF AB magnitude (G2)magphot.mag;em.opt.Rfloatnullablee_rmag[0.004/4.8]? Error in rmagmagstat.error;phot.magfloatnullableimag[15/22.1]? BEST SDSS i band PSF AB magnitude (G2)magphot.mag;em.opt.Ifloatnullablee_imag[0.005/6]? Error in imagmagstat.error;phot.magfloatnullablezmag[14.8/22.7]? BEST SDSS z band PSF AB magnitude (G2)magphot.mag;em.opt.Ifloatnullablee_zmag[0.01/2.3]? Error in zmagmagstat.error;phot.magfloatnullableAu[0.02/3] Galactic extinction in u filter (G3)magphys.absorption.gal;em.opt.UfloatlogNH[19.7/21.4] Log of Galactic HI column densitylog(cm**-2)phys.columnDensity;pos.galacticfloatF20[-1/16.4] FIRST Peak 20cm flux density (1)magphot.flux.density;em.radio.750-1500MHzfloatq_F20[0/1000] Signal-to-ratio for F20meta.code.qualdoubleSepSF[0/2] SDSS/FIRST separationarcsecpos.angDistancefloatlogCR[-9/-0.1] RASS BSC/FSC full band count rate (2)log(count.s**-1)phot.count;em.X-raydoubleq_logCR[0/24] Signal-to-ratio for logCRmeta.code.qualfloatSepSR[0/30] SDSS/RASS separationarcsecpos.angDistancefloatJmag[13/18.7]? 2MASS J band magnitude (3)magphot.mag;em.IR.Jfloatnullablee_Jmag[0.02/0.5]? Error in Jmagmagstat.error;phot.magfloatnullableHmag[12.2/17.7]? 2MASS H band magnitude (3)magphot.mag;em.IR.Hfloatnullablee_Hmag[0.02/0.6]? Error in Hmagmagstat.error;phot.magfloatnullableKsmag[11.3/17.15]? 2MASS Ks band magnitude (3)magphot.mag;em.IR.Kfloatnullablee_Ksmag[0.02/0.6]? Error in Kmagmagstat.error;phot.magfloatnullableSepS2M[0/2] SDSS/2MASS separationarcsecpos.angDistancefloat2Flg[0/26] 2MASS Flags (4)meta.codeintiMag[-30.3/-22] Absolute SDSS i band magnitude (G1)magphys.magAbs;em.opt.IdoubleD(g-i)[-1.4/3.7] The (g-i) color offset (5)magphot.color;em.opt.B;em.opt.IfloatMFlgMorphology flag (1=extended; 0=point source)meta.codeintSciFlgSCIENCEPRIMARY flag (1=is SCIENCEPRIMARY)meta.codeintSMFlg[0/3] SDSS MODE flag (6)meta.codeintUFlgUniform target selection flag (1=selected with final algorithm)meta.codeintBFlg[0/573571072] Target selection flag; BESTmeta.codelongBLow-zLow-z Quasar, color selection only, target flag (1=targeted)meta.codeintBHi-zHigh-z Quasar, color selection only, target flag (1=targeted)meta.codeintBFTFlgFIRST target flag (1=targeted)meta.codeintBRTFlgROSAT target flag (1=targeted)meta.codeintBSerFlgSerendipity target flag (1=targeted)meta.codeintBStarFlgStar target flag (1=targeted)meta.codeintBGalFlgGalaxy target flag (1=targeted)meta.codeintRun[94/7264] SDSS Imaging Run Number for photometric measurementsmeta.idintMJD-SModified Julian Date of spectroscopic observationdtime.epochintPlateSpectroscopic Plate Numbermeta.id;instr.plateintFiberSpectroscopic Fiber Numbermeta.idintReRunSDSS Photometric Processing Rerun Numbermeta.id;obsintCameraSDSS Camera Column Numbermeta.id;instrintFrameSDSS Frame Numberobs.fieldintObjectSDSS Object Numbermeta.idintTFlgTarget selection flag; TARGETmeta.codeTLow-zLow-z Quasar, color selection only, target flag (1=targeted)meta.codeintTHi-zHigh-z Quasar, color selection only, target flag (1=targeted)meta.codeintTFTFlgFIRST target flag (1=targeted)meta.codeintTRTFlgROSAT target flag (1=targeted)meta.codeintTSerFlgSerendipity target flag (1=targeted)meta.codeintTStarFlgStar target flag (1=targeted)meta.codeintTGalFlgGalaxy target flag (1=targeted)meta.codeintuTmag? TARGET SDSS u band PSF magnitude (G2)magphot.mag;em.opt.Ufloatnullablee_uTmag? Error in uTmagmagstat.error;phot.magfloatnullablegTmag? TARGET SDSS g band PSF magnitude (G2)magphot.mag;em.opt.Bfloatnullablee_gTmag? Error in gTmagmagstat.error;phot.magfloatnullablerTmag? TARGET SDSS r band PSF magnitude (G2)magphot.mag;em.opt.Rfloatnullablee_rTmag? Error in rTmagmagstat.error;phot.magfloatnullableiTmag? TARGET SDSS i band PSF magnitude (G2)magphot.mag;em.opt.Ifloatnullablee_iTmag? Error in iTmagmagstat.error;phot.magfloatnullablezTmag? TARGET SDSS z band PSF magnitude (G2)magphot.mag;em.opt.Ifloatnullablee_zTmag? Error in zTmagmagstat.error;phot.magfloatnullableObjIDBEST object ID; 64-bit integermeta.idSpecIDSpectroscopic Object ID; 64-bit integermeta.idNamePreviously published name (7)meta.idcharSloanDisplay the online SDSS-DR16 data for the nearest objectmeta.ref.urlcharMJD-IModified Julian Date of imaging observationdtime.epochintindexedSDSSDR7 Object Designation (HHMMSS.ss+DDMMSS.s; J2000)meta.id;meta.maincharJ/ApJ/753/106/southcatSDSS S82 spectroscopically confirmed quasars; selected data (DB_QSO_S82.dat)SimbadNameSimbad column added by the CDSmeta.idcharnullablez[0.08/5.09] Redshiftsrc.redshiftfloatNEDNED column added by the CDSmeta.ref.urlcharMBH[-1/10.97]? log of black hole mass (1)log(solMass)phys.massfloatnullablelogLbol[-1/47.9]? Log of bolometric luminosity in erg/s (1)log(1e-07W)phys.luminosityfloatnullableumag[15.54/26.27]? SDSS BEST u-band PSF AB magnitude (G2)magphot.mag;em.opt.Ufloatnullablegmag[15.51/26.04]? SDSS BEST g-band PSF AB magnitude (G2)magphot.mag;em.opt.Bfloatnullablermag[15.44/22.51]? SDSS BEST r-band PSF AB magnitude (G2)magphot.mag;em.opt.Rfloatnullableimag[15.36/22.09]? SDSS BEST i-band PSF AB magnitude (G2)magphot.mag;em.opt.Ifloatnullablezmag[15.13/22.68]? SDSS BEST z-band PSF AB magnitude (G2)magphot.mag;em.opt.IfloatnullableAu[0.07/1.81]? Galactic extinction in u filter (G3)magphys.absorption.gal;em.opt.UfloatnullableS11Display data from Shen+, 2011, J/ApJS/194/45 within 1"meta.ref.urlcharLCInteractive LC plotmeta.ref.urlcharSloanDisplay the online SDSS-DR16 data for the nearest objectmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDBID[70/7913279] Internal identifier (Name of the light curve file)meta.id;meta.mainintRAJ2000Median right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Median declination (J2000)degpos.eq.dec;meta.mainSDR5ID[1/77429]? Row of DR5 Quasar Catalog IV (Schneider+ 2007, VII/252)meta.idintnullableiMag[-29.6/-22] Absolute i band magnitude (G1)magphys.magAbs;em.opt.IfloatiMagc[-30.07/-1] Corrected absolute i-band magnitude; K-corrected to z=2 (1)magphys.magAbs;em.opt.IfloatJ/ApJ/753/106/sdsspossAll SDSS DR7 quasars with DPOSS observationsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[-2.5/70] Declination (J2000)degpos.eq.dec;meta.mainindexedPlate[61/894] DPOSS plate identifiermeta.id;instr.plateintEpochR[1986.67/1999.87] Epoch of the DPOSS observation in the R bandyrtime.epochdoubleEpochI[-123/2000.26] Epoch of the DPOSS observation in the I bandyrtime.epochdoubleGmag[11.6/23.7]? DPOSS G-band magnitude not corrected for Galactic absorptionmagphot.mag;em.optfloatnullablee_Gmag[0/2]? Uncertainty on the Gmagmagstat.error;phot.magfloatnullableq_Gmag[0/1] Quality of Gmag (1=good) (1)meta.code.qualintRmag[14.2/23]? DPOSS R magnitude not corrected for Galactic absorptionmagphot.mag;em.opt.Rfloatnullablee_Rmag[0.05/0.7]? Uncertainty on the Rmagmagstat.error;phot.magfloatnullableq_Rmag[0/1] Quality of Rmag (1=good) (1)meta.code.qualintImag[10.4/23.1]? DPOSS I band magnitude not corrected for Galactic absorptionmagphot.mag;em.opt.Ifloatnullablee_Imag[0.06/0.6]? Uncertainty on the Imagmagstat.error;phot.magfloatnullableq_Imag[0/1] Quality of Imag (1=good) (1)meta.code.qualintSDR5ID[-32768/32767] Row of DR7 Quasar Catalog V (Schneider+ 2007, VII/252)meta.idintiMag[-30.3/-22] Absolute i-band magnitude (G1)magphys.magAbs;em.opt.Ifloatz[0.078/5.47] Redshiftsrc.redshiftfloatMBH[6.9/11.4]? log of black hole mass (2)solMassphys.massfloatnullablelogLbol[44/48.3]? Log of bolometric luminosity in erg/s (2)log(1e-07W)phys.luminosityfloatnullableAu[0.015/1.81] Galactic extinction in u filter (G3)magphys.absorption.gal;em.opt.UfloatNobs[1/143] Number of observationsmeta.numberintFlag[0/1] Flag for Stripe 82 objectmeta.code.errorintMJDr[51075/54210]? Modified Julian Date for SDSS r-band imaging observationdtime.epochfloatnullablegmag[15.38/26.42] BEST SDSS g-band PSF AB magnitude (G2)magphot.mag;em.opt.Bfloate_gmag[0.003/1.22] Uncertainty on the gmagmagstat.error;phot.magfloatrmag[15.2/22.4]? BEST SDSS r-band PSF AB magnitude (G2)magphot.mag;em.opt.Rfloatnullablee_rmag[0.003/0.9] Uncertainty on the rmagmagstat.error;phot.magfloatimag[14.8/21.91]? BEST SDSS i-band PSF AB magnitude (G2)magphot.mag;em.opt.Ifloatnullablee_imag[0.003/1.1] Uncertainty on the imagmagstat.error;phot.magfloatS11Display data from Shen+, 2011, J/ApJS/194/45 within 1"meta.ref.urlcharSloanDisplay the online SDSS-DR16 data for the nearest objectmeta.ref.urlcharEpochG[1986.11/2000.03] Epoch of the DPOSS observation in the G bandyrtime.epochdoubleindexed