J/ApJ/950/96ivo://CDS.VizieR/J/ApJ/950/96doi:10.26093/cds/vizier/ba-xp-30CDSDix C.Matthews B.Shemmer O.Brotherton M.S.Myers A.D.,Andruchow I.Brandt W.N.Ferrero G.A.Green R.Lira P.Plotkin R.M.,Richards G.T.Schneider D.P.2026-07-02T11:59:46Z2025-09-04T12:38:27ZCDS support team

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

cds-question@unistra.frquasarsvisible-astronomyspectroscopyinfrared-astronomysurveysline-intensitiesblack-holesThe most reliable single-epoch supermassive black hole mass (MBH) estimates in quasars are obtained by using the velocity widths of low-ionization emission lines, typically the H{beta}{lambda}4861 line. Unfortunately, this line is redshifted out of the optical band at z~1, leaving MBH estimates to rely on proxy rest-frame ultraviolet (UV) emission lines, such as CIV{lambda}1549 or MgII{lambda}2800, which contain intrinsic challenges when measuring, resulting in uncertain MBH estimates. In this work, we aim at correcting MBH estimates derived from the CIV and MgII emission lines based on estimates derived from the H{beta} emission line. We find that employing the equivalent width of CIV in deriving MBH estimates based on MgII and CIV provides values that are closest to those obtained from H{beta}. We also provide prescriptions to estimate MBH values when only CIV, only MgII, and both CIV and MgII are measurable. We find that utilizing both emission lines, where available, reduces the scatter of UV-based MBH estimates by ~15% when compared to previous studies. Lastly, we discuss the potential of our prescriptions to provide more accurate and precise estimates of MBH given a much larger sample of quasars at 3.20R<~z<~3.50, where both MgII and H{beta} can be measured in the same near-infrared spectrum.2023ApJ...950...96Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/950/96CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJ/746/169 : Luminosity function of broad-line quasars (Shen+, 2012)J/ApJS/217/26 : Lick AGN monitoring 2011: light curves (Barth+, 2015)J/ApJS/216/4 : SDSS-RM project: technical overview (Shen+, 2015)J/ApJ/831/7 : SDSS-RM project: peak velocities of QSOs (Shen+, 2016)J/MNRAS/465/2120 : Correcting CIV-based virial BH masses (Coatman+, 2017)J/ApJ/851/21 : SDSS RM project first year of observations (Grier+, 2017)J/ApJ/856/6 : SEAMBHs IX. 10 new H{beta} light curves (Du+, 2018)J/ApJ/865/56 : Emission line & R-band cont. LCs of 17 QSOs (Lira+, 2018)J/ApJ/886/42 : Reverberation mapping & opt. sp. data of AGNs (Du+, 2019)J/ApJ/887/38 : SDSS RM Project: CIV lags & LCs (Grier+, 2019)J/MNRAS/488/1519 : Calibration of the virial factor f in SMBHs (Yu+, 2019)J/ApJ/903/112 : SDSS Hb & CIV reverberation mapped AGNs (Dalla Bonta+, 2020)J/ApJ/901/55 : SDSS-RM project: MgII lags from 4yrs obs. (Homayouni+, 2020)J/ApJS/249/17 : SDSS QSO DR14 spectral properties (Rakshit+, 2020)J/ApJ/905/51 : X-SHOOTER/ALMA QSOs at 5.78<z<7.54. I. (Schindler+, 2020)J/MNRAS/491/5881 : Extended size-luminosity relation for RM AGNs (Yu+, 2020)J/ApJS/253/20 : SEAMBHs XII. Reberberation mapping for PG QSOs (Hu+, 2021)J/ApJ/915/129 : 13yr of spectrophotometrically monitored QSOs (Kaspi+, 2021)J/ApJS/252/15 : GNIRS-Distant Quasar Survey (GNIRS-DQS) (Matthews+, 2021)J/ApJ/923/262 : NIR spectroscopic obs. of z>6.5 quasars (Yang+, 2021)J/ApJS/262/14 : AGNs with H{beta} asymmetry. III. 15 PG quasars (Bao+, 2022)J/ApJ/925/52 : LAMP 2016: velocity-resolved Hb lags in Sy gal. (U+, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/950/96https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/950/96http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/950/96https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/950/96https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/950/96http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/950/96GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/950/96/table1 (CIV and MgII spectroscopic measurements)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/950/96/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/950/96/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/950/96/table1?GETtext/xml+votable180.050000true2.578683928.15905190.005555555555555556Cone search capability for table J/ApJ/950/96/table3 (M_BH_ estimates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/950/96/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/950/96/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/950/96/table3?GETtext/xml+votable180.050000true2.578683928.15905190.0055555555555555566/526 642 2089 2571 4099 4139 4155 4164 4224 4273 4299 4343 4367 4406 4451 4459 4483 4524 4534 4579 4596 4604 4617 4630 4639 4648 4657 4665 4686 4699 4790 4844 4888 4891 4930 4977 5056 5065 5087 5094 5128 5133 5163 5227 5303 5318 5335 5344 5366 5402 5470 5486 5551 5637 5641 5651 5657 5661 5692 5698 5723 5793 5803-5804 5819-5820 5845 5879 5902 5914 5937-5938 5950 6038 6053 6070 6106 6112 6131 6168 6192 6210 6220 6419 6421 6428 6432-6433 6495 6577 6587 6598 6604 6639 6648 6652 6915 6930 6976 7199 7208 7232 7252 7313 7324 7399 7408 7432 7485 7500 7529 7553 7609 8404 8416 8524 8549 8592 8674 8740 8784 8799 8923 8942 8947 8954 8965 9120 9268 9282 9286 9359 9365 9401 9403 9454 9759 9800 9912 10074 10148 10269 10331 10601 10706 10717 10919 10957-10958 10976 10996 10999 11082 11140 11281 11294 11358 11429 11486 12625 12756 13351 17317 17500 17550 17607 17725 17756 17824 17832 17987 18043 18055 18076 18081 18113 18115-18116 18192 18207 18239 18341 18352 18375 18381 18416 18769 18851 18865 18948 19106 19110 19290 19384 19558 19766 19813 19817 19842 20031 20057 20205 20295 20320-20321 20366 20439 21983 22013 22359 23058 25953 25955 26103 26298 26453 26567 26972 26992 27080 27118 27197 27206 27251 27342 27360 27426 27430 27460 27574 27578 27745 27794 27884 27908 28160 28162 28174 28181 28251 28283 28316 28365 28382 28436 28456 28473 28507 28538 28572 28604 28651 31740 45046 45049 48989 49100 49106https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/950/96?format=asciiOpticalInfrareddefaultJ/ApJ/950/96/table1CIV and MgII spectroscopic measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSimbadNameSimbad column added by the CDSmeta.idcharnullableNEDNED column added by the CDSmeta.ref.urlcharSDSSSDSS DR16 object designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryFWHMCIV[1928/11952]? C IV Full-Width at Half-Maximumkm/sspect.line.widthfloatnullableE_FWHMCIV[23/2423]? Upper uncertainty in FWHMCIVkm/sstat.error;stat.max;spect.line.widthfloatnullablee_FWHMCIV[34/3615]? Lower uncertainty in FWHMCIVkm/sstat.error;stat.min;spect.line.widthfloatnullableMADCIV[543/11790]? C IV mean absolute deviationkm/sstat.stdev;stat.meanfloatnullableE_MADCIV[21/2255]? Upper uncertainty in MADCIVkm/sstat.error;stat.max;stat.stdevfloatnullablee_MADCIV[32/3363]? Lower uncertainty in MADCIVkm/sstat.error;stat.min;stat.stdevfloatnullablesigCIV[1802/12121]? C IV line dispersionkm/sinstr.dispersion;spect.linefloatnullableE_sigCIV[33/3567]? Upper uncertainty in sigCIVkm/sstat.error;stat.max;instr.dispersionfloatnullablee_sigCIV[49/5320]? Lower uncertainty in sigCIVkm/sstat.error;stat.min;instr.dispersionfloatnullableEWCIV[2.8/135]? C IV equivalent width; Angstrom0.1nmspect.line.eqWidthfloatnullableE_EWCIV[0.2/11]? Upper uncertainty in EWCIV0.1nmstat.error;stat.max;spect.line.eqWidthfloatnullablee_EWCIV[0.3/15]? Lower uncertainty in EWCIV0.1nmstat.error;stat.min;spect.line.eqWidthfloatnullablepkCIV[3955/7016]? C IV observed-frame peak line wavelength; Angstroms0.1nmem.wl;stat.maxfloatnullableE_pkCIV[0/29.5]? Upper uncertainty in pkCIV0.1nmstat.error;stat.max;em.wlfloatnullablee_pkCIV[0/43.9]? Lower uncertainty in pkCIV0.1nmstat.error;stat.min;em.wlfloatnullableFWHMMgII[1319/8537]? Mg II Full-Width at Half-Maximumkm/sspect.line.widthfloatnullableE_FWHMMgII[27/1524]? Upper uncertainty in FWHMMgIIkm/sstat.error;stat.max;spect.line.widthfloatnullablee_FWHMMgII[36/2017]? Lower uncertainty in FWHMMgIIkm/sstat.error;stat.min;spect.line.widthfloatnullableMADMgII[606/6583]? Mg II mean absolute deviationkm/sstat.stdev;stat.meanfloatnullableE_MADMgII[22/6428]? Upper uncertainty in MADMgIIkm/sstat.error;stat.max;stat.stdevfloatnullablee_MADMgII[29/3913]? Lower uncertainty in MADMgIIkm/sstat.error;stat.min;stat.stdevfloatnullablesigMgII[761/9644]? Mg II line dispersionkm/sinstr.dispersion;spect.linefloatnullableE_sigMgII[32/8812]? Upper uncertainty in sigMgIIkm/sstat.error;stat.max;instr.dispersionfloatnullablee_sigMgII[42/6210]? Lower uncertainty in sigMgIIkm/sstat.error;stat.min;instr.dispersionfloatnullableEWMgII[6/93]? Mg II equivalent width; Angstrom0.1nmspect.line.eqWidthfloatnullableE_EWMgII[0/37]? Upper uncertainty in EWMgII0.1nmstat.error;stat.max;spect.line.eqWidthfloatnullablee_EWMgII[0/49]? Lower uncertainty in EWMgII0.1nmstat.error;stat.min;spect.line.eqWidthfloatnullablepkMgII[7150/12709]? Mg II observed-frame peak line wavelength; Angstroms0.1nmem.wl;stat.maxfloatnullableE_pkMgII[0/20]? Upper uncertainty in pkMgII0.1nmstat.error;stat.max;em.wlfloatnullablee_pkMgII[0/26]? Lower uncertainty in pkMgII0.1nmstat.error;stat.min;em.wlfloatnullablelogL1350[45.7/47.5]? Log 1350A luminosity; erg/s1e-07Wphys.luminosity;em.UV.100-200nmfloatnullablelogL3000[46.2/47.2]? Log 3000A luminosity; erg/s1e-07Wphys.luminosity;em.UV.200-300nmfloatnullableM21Display data from Matthews+ 2021, J/ApJS/252/15meta.ref.urlintnullableDR16QDisplay data from the SDSS quasar cat. DR16 (VII/289)meta.ref.urlcharPapIDisplay data from the Paper I (Matthews+ 2023, J/ApJ/950/95)meta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/950/96/table3M_BH_ estimatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS DR16 object designation (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryMHbFWHM[8/10.1] Log black hole mass from H{beta} Full-Width at Half-Maximumlog(solMass)phys.massfloatSimbadNameSimbad column added by the CDSmeta.idcharnullableNEDNED column added by the CDSmeta.ref.urlcharM21Display data from Matthews+ 2021, J/ApJS/252/15meta.ref.urlintnullableMCIVMAD[1/9.8] Log black hole mass from CIV mean absolute deviationlog(solMass)phys.massfloatMCIVsig[7.6/10.2] Log black hole mass from CIV line dispersionlog(solMass)phys.massfloatMCIVVPO6[8.2/10.6]? Log black hole mass from Vestergaard & Peterson 2006ApJ...641..689Vlog(solMass)phys.massfloatnullableMCIVP17[8/10.1]? Log black hole mass from Park+ 2017ApJ...839...93Plog(solMass)phys.massfloatnullableMCIVC17[5/10.9]? Log black hole mass from Coatman+ 2017, J/MNRAS/465/2120log(solMass)phys.massfloatnullableMCIVFWHM[7/10.3]? Log black hole mass from CIV Full-Width at Half-Maximumlog(solMass)phys.massfloatnullableMMgIIMAD[7.2/10.5]? Log black hole mass from MgII mean absolute deviationlog(solMass)phys.massfloatnullableMMgIIsig[8.2/10.4]? Log black hole mass from MgII line dispersionlog(solMass)phys.massfloatnullableMMgIIVO09[8.3/10]? Log black hole mass from Vestergaard & Osmer 2009, J/ApJ/699/800log(solMass)phys.massfloatnullableMMgIIZ15[8.5/10.2]? Log black hole mass from Zuo+ 2015ApJ...799..189Zlog(solMass)phys.massfloatnullableMMgIIL20[8.4/10.2]? Log black hole mass from Le+ 2020ApJ...901...35Llog(solMass)phys.massfloatnullableMFWHMw[8.4/10.1]? Log black hole mass with CIV Full-Width at Half-Maximumlog(solMass)phys.massfloatnullableMFWHMwo[8.4/10.2]? Log black hole mass without CIV Full-Width at Half-Maximumlog(solMass)phys.massfloatnullableMMADw[8.4/10.3]? Log black hole mass with CIV mean absolute deviationlog(solMass)phys.massfloatnullableMMADwo[8.5/10.5]? Log black hole mass without CIV mean absolute deviationlog(solMass)phys.massfloatnullableMsigw[8.4/10.4]? Log black hole mass with CIV line dispersionlog(solMass)phys.massfloatnullableMsigwo[8.4/10.5]? Log black hole mass without CIV line dispersionlog(solMass)phys.massfloatnullableDR16QDisplay data from the SDSS quasar cat. DR16 (VII/289)meta.ref.urlcharPapIDisplay data from the Paper I (Matthews+ 2023, J/ApJ/950/95)meta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main