J/MNRAS/520/2781ivo://CDS.VizieR/J/MNRAS/520/2781CDSKynoch D.Mitchell J.A.J.Ward M.J.Done C.Lusso E.Landt H.2026-04-27T08:18:07Z2026-04-27T08:37:19ZCDS support team

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

cds-question@unistra.frquasarsactive-galactic-nucleiblack-holesastronomical-object-identificationaccretionspectroscopyphotometryvisible-astronomyx-ray-sourcesradio-sourcesultraviolet-astronomyline-intensitiesgalaxy-kinematicsWe assemble a sample of 696 type 1 active galactic nuclei (AGN) up to a redshift of z = 2.5, all of which have an SDSS spectrum containing at least one broad emission line (H{alpha}, H{beta}, or Mg II) and an XMM-Newton X-ray spectrum containing at least 250 counts in addition to simultaneous optical/ultraviolet photometry from the XMM Optical Monitor. Our sample includes quasars and narrow-line Seyfert 1s: thus our AGN span a wide range in luminosity, black hole mass, and accretion rate. We determine single-epoch black hole mass relations for the three emission lines and find that they provide broadly consistent mass estimates whether the continuum or emission line luminosity is used as the proxy for the broad emission line region radius. We explore variations of the UV/X-ray energy index {alpha}_ox_ with the UV continuum luminosity and with black hole mass and accretion rate, and make comparisons to the physical quasar spectral energy distribution model QSOSED. The majority of the AGN in our sample lie in a region of parameter space with 0.02 < L/L_Edd_ < 2 as defined by this model, with narrow- line type 1 AGN offset to lower masses and higher accretion rates than typical broad-line quasars. We find differences in the dependence of {alpha}_ox_ on UV luminosity between both narrow/broad-line and radio-loud/quiet subsets of AGN: {alpha}_ox_ has a slightly weaker dependence on UV luminosity for broad-line AGN and radio-loud AGN have systematically harder {alpha}_ox_.2023MNRAS.520.2781Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/520/2781CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/504/5726 : IR lines of AGNs accretion disk (Fernandez-Ontiveros+, 2021)J/MNRAS/496/245 : L_x_-L_uv_-L_radio_ relation in radio-loud quasarsJ/MNRAS/422/3268 : Relation between X-ray and optical spectra (Jin+, 2012)J/MNRAS/383/581 : Broad-line Balmer decrements in blue AGN (Dong+, 2008)J/ApJ/843/30 : MgII line vs 3000{AA} continuum analysis in 68 QSOsJ/ApJ/819/154 : SDSS-DR7 QSOs with X-ray and UV luminosities (Lusso+, 2016)J/ApJ/753/125 : Near-IR spectroscopy follow-up of 60 SDSS-DR7 QSOsJ/ApJ/613/682 : AGN central masses and broad-line region sizesJ/ApJS/249/17 : SDSS QSO DR14 spectral properties (Rakshit+, 2020)J/ApJS/241/34 : The SDSS Reverberation Mapping (SDSS-RM) projectJ/ApJS/229/39 : Narrow line Seyfert 1 galaxies from SDSS-DR12J/ApJS/206/4 : SED and bolometric corrections for luminous QSOsJ/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJS/166/128 : Narrow line Seyfert 1 galaxies from SDSS-DR3 (Zhou+, 2006)J/AJ/130/387 : SDSS-ROSAT AGN data (Strateva+, 2005)J/A+A/663/L7 : Quasars as high-redshift standard candles (Sacchi+, 2022)J/A+A/512/A34 : XMM-COSMOS Type 1 AGNs (Lusso+, 2010)VIII/76 : Leiden/Argentine/Bonn (LAB) Survey of Galactic HIVIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VII/286 : SDSS quasar catalog, fourteenth data release (Paris+, 2018)IX/59 : XMM-Newton Serendipitous Source Catalogue 4XMM-DR9II/340 : XMM-OM Serendipitous Source Survey Catalogue (XMM-SUSS2.1)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/520/2781https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/520/2781http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/520/2781https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/520/2781https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/520/2781http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/520/2781GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/520/2781/table (Spectroscopic and photometric measurements and physical quantities of AGN in the SOUX sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/520/2781/table?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/520/2781/table?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/520/2781/table?GETtext/xml+votable180.050000true5.5414770.2748110.0055555555555555565/4421-4422 6/2098 2113 2187-2188 2229 2251 4100 4196 4206 4215 4285 4312-4313 4315 4378 4407 4506 4536 4698 4720 4748 4754 4803-4804 4821 4850 4859 4943 4947 4954 4962 4964-4965 4967 5069 5091 5109 5116 5118 5135 5241 5244 5262 5304-5305 5307 5363 5367 5437 5469 5500 5536 5560 5568 5576 5610 5616 5618 5630 5671 5685 5701 5715 5725 5732-5733 5762 5794 5820 5824 5860 5862 5922 5928 5937 5939 5945 5983-5984 5988 6015 6027 6033 6051 6059 6069 6071 6073 6077 6102 6112 6124 6172 6251-6252 6420 6458 6476 6495 6498 6532 6534 6539 6544 6574 6641 6644-6645 6977 7178 7228 7241 7260 7266 7273 7281 7298 7308-7309 7349 7426 7456 7522 7604 7606 8195 8199 8220 8222 8268 8286 8299 8324 8442 8458 8493 8552 8641 8644 8666 8681 8707 8741 8809 8845 8906 8912 8918 8920 8927 8934 8943 9018 9146 9168 9181 9203 9242 9245 9287 9343 9401 9414-9415 9428 9452 9465 9468 9477 9642 9750 9752 9754 9770 9821 9863 9894 9927 9959 9988 9992 9997 10116 10122 10190-10191 10212 10288 10306 10312-10313 10321 10338 10371 10378-10379 10389 10401 10414 10441 10454 10465 10472 10484 10544 10549 10567 10570 10578 10602 10604 10618 10645 10657 10691 10694 10700 10706-10707 10709 10717 10743 10749 10761 10856 10912 10925 10936 10940-10941 10963 10968-10969 10979-10980 11000 11006 11027 11048 11080 11111 11116 11159 11206 11217 11252-11253 11302 11311 11326 11355 11374-11375 11377 11392 11401 11424-11425 11427-11428 11430 11432-11433 11470 11476 11498 11779 11787 11790-11791 11829 11831 11875 11931-11932 11936 12633 12636 13314 17497 17511 17520 17622 17662 17674-17675 17677-17679 17681-17683 17692 17694-17697 17699-17701 17703 17708 17712-17714 17725 17744 17746 17754 17765-17767 17772 17799 17805 17819 17827-17828 17832 17840 17850 17866 17999 18006 18022-18023 18032 18041 18060 18071 18096 18176 18184 18242 18367 18757 18779 18782 18786 18790 18858 18880 18883 19021 19027 19036 19216 19218 19402 19470 19676 19717 19851 19883 20030 21852 23144 23208-23210 23216 25852 25919 25936 25944 25953 25968 25972 25977 26003 26018-26019 26022 26091 26102 26175 26188-26189 26195 26209 26221 26270 26297-26298 26300 26310 26365 26370 26427 26483 26509 26561 26975 26998 27005 27026 27088 27102 27124 27127 27242-27243 27246 27256 27258-27259 27314 27343 27365 27412 27423 27440 27464 27580 27604 27607 27617 27652 27668 27714-27715 27719-27720 27722 27728 27730 27742 27763 27765 27767 27773 27913 27945 27950 27963 27966 28035 28037 28045 28127 28142 28172-28174 28184 28188 28221 28251 28356 28374 28393 28430 28449 28452 28471 28492 28517 28541 28555 28589 28610 28621 30033 31397-31398 31465 32422 32500 36764-36765 36767 36779 36786 36798 49017https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/520/2781?format=asciiX-rayUVOpticalRadiodefaultJ/MNRAS/520/2781/tableSpectroscopic and photometric measurements and physical quantities of AGN in the SOUX samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintExplorerDisplay the online SDSS-DR14 data for the nearest objectmeta.ref.urlcharSPDisplay the SDSS DR17 interactive spectrummeta.ref.urlchare_logL4400sp? Uncertainty on logL4400sp (LOG_L4400_SPEC_ERR)1e-07Wstat.errordoublenullablelogL4400OM? Logarithm of the continuum luminosity at 4400 {AA} rest-frame from XMM-Newton OM photometry (LOG_L4400_PHOT_OM)1e-07Wphys.luminosity;em.opt.Udoublenullablee_logL4400OM? Uncertainty on logL4400OM (LOG_L4400_PHOT_OM_ERR)1e-07Wstat.errordoublenullablee_logL4400ph? Uncertainty on logL4400ph (LOG_L4400_PHOT_SDSS)1e-07Wstat.errordoublenullablelogLMgII? Logarithm of the luminosity of the broad Mg II emission line (LOGL_MGII_BR)1e-07Wphys.luminosity;spect.line;em.UV.200-300nmdoublenullablee_logLMgII? Uncertainty on logLmgII (LOGL_MGII_BR_ERR)1e-07Wstat.errordoublenullableq_logLMgII? Quality flag indicator on logLmgII (QUALITY_MGII) (6)meta.code.qualintnullablelogL5GHz? Logarithm of L{nu}5GHz flux estimated from the FIRST radio flux as explained in section 3.3 (LOG_L5GHZ)W/Hzphot.flux.density;em.radio.3-6GHzdoublenullablee_logL5GHz? Uncertainty on logL5GHz (LOG_L5GHZ_ERR)W/Hzstat.errordoublenullableRL? Radio loudness parameter (R_LOUD) (17)phot.flux;arith.ratio;em.radio.3-6GHzdoublenullablef_RLFlag for RL types (R_LOUD_FLAG) (8)meta.codecharSimbadNameSimbad column added by the CDSmeta.idcharnullableSDSSUnique SDSS spectrum identifier as PLATE-MJD-FIBER (SDSS_ID)meta.id;meta.maincharRAJ2000Degrees Right Ascension (J2000) (RA)degpos.eq.ra;meta.mainDEJ2000Degrees Declination (J2000) (DEC)degpos.eq.dec;meta.mainzSpectroscopic redshift (Z)src.redshiftfloatSDSSDR14QDisplay the SDSS-DR14Q of Paris et al. 2018A&A...613A..51P, Cat. VII/286meta.ref.urlintnullableRakshit17Display the NLSy1 SDSS-DR12 of Rakshit et al. 2017ApJS..229...39R, Cat. J/ApJS/229/39meta.ref.urlintnullableRakshit20Display SDSS QSO DR14 spectral properties of Rakshit et al. 2020ApJS..249...17R, Cat. J/ApJS/249/17meta.ref.urlintnullable3XMMDR7Display 3XMMDR7 catalogue of Rosen et al. 2016A&A...590A...1R, Cat. IX/54meta.ref.urlintnullable4XMMDR9Display 4XMMDR9 catalogue of Webb et al. 2020A&A...641A.136W, Cat. IX/59meta.ref.urlintnullableXMMSUSS4.1Display XMMSUSS4.1) OM catalogue of Page et al. 2012MNRAS.426..903P, Cat. II/356meta.ref.urlintnullableDR14Q[0/1] If source is in SDSS DR14 quasar from Paris et al. 2018A&A...613A..51P, Cat. VII/286 636 times (DR14Q)meta.codeintR17[0/1] If source is in R17 NLS1 from Rakshit et al. 2017ApJS..229...39R, Cat. J/ApJS/229/39 132 times (R17)meta.codeintSNRmedMedian S/N sampled in emission-line free windows of the spectrum (SN_RATIO_CONT)stat.snrdoubleWaveMinShortest rest-frame wavelength covered in the optical spectrum (MIN_WAVE)0.1nmem.wl;stat.mindoubleWaveMaxLongest rest-frame wavelength covered in the optical spectrum0.1nmem.wl;stat.maxdoublelogL1350? Logarithm of the continuum luminosity at 1350 {AA} rest-frame from the SDSS spectrum (LOG_L1350)1e-07Wphys.luminosity;spect.continuum;em.UV.100-200nmdoublenullablee_logL1350? Uncertainty on logL1350 (LOG_L1350_ERR)1e-07Wstat.errordoublenullableq_logL1350? Quality flag indicator on logL1350 (QUALITY_L1350) (1)meta.code.qualintnullablelogL2500sp? Logarithm of the continuum luminosity at 2500 {AA} rest-frame from the SDSS spectrum (LOG_L2500_SPEC)1e-07Wphys.luminosity;spect.continuum;em.UV.200-300nmdoublenullablee_logL2500sp? Uncertainty on logL2500sp (LOG_L2500_SPEC_ERR)1e-07Wstat.errordoublenullablelogL2500OM? Logarithm of the continuum luminosity at 2500 {AA} rest-frame from XMM-Newton OM photometry (LOG_L2500_PHOT_OM)1e-07Wphys.luminosity;em.UV.200-300nmdoublenullablee_logL2500OM? Uncertainty on logL2500OM (LOG_L2500_PHOT_OM_ERR)1e-07Wstat.errordoublenullablelogL2500ph? Logarithm of the continuum luminosity at 2500 {AA} rest-frame from SDSS photometry (LOG_L2500_PHOT_SDSS)1e-07Wphys.luminosity;em.UV.200-300nmdoublenullablee_logL2500ph? Uncertainty on logL2500ph (LOG_L2500_PHOT_SDSS_ERR)1e-07Wstat.errordoublenullablelogL3000? Logarithm of the continuum luminosity at 3000 {AA} rest-frame from the SDSS spectrum (LOG_L3000)1e-07Wphys.luminosity;spect.continuum;em.UV.200-300nmdoublenullablee_logL3000? Uncertainty on logL3000 (LOG_L3000_ERR)1e-07Wstat.errordoublenullableq_logL3000? Quality flag indicator on logL3000 (QUALITY_L3000) (2)meta.code.qualintnullablelogL4400sp? Logarithm of the continuum luminosity at 4400 {AA} rest-frame from the SDSS spectrum (LOG_L4400_SPEC)1e-07Wphys.luminosity;spect.continuum;em.opt.UdoublenullablelogL4400ph? Logarithm of the continuum luminosity at 4400 {AA} rest-frame from SDSS photometry (LOG_L4400_PHOT_SDSS)1e-07Wphys.luminosity;em.opt.UdoublenullablelogL5100? Logarithm of the continuum luminosity at 5100 {AA} rest-frame from the SDSS spectrum (LOG_L5100)1e-07Wphys.luminosity;spect.continuum;em.opt.Vdoublenullablee_logL5100Uncertainty on logL5100 (LOG_L5100_ERR)1e-07Wstat.errorcharq_logL5100? Quality flag indicator on logL5100 (QUALITY_L5100) (3)meta.code.qualintnullableFWHMHa? Full-width at half-maximum of the broad H{alpha} emission line (FWHM_HA_BR)km/sspect.line.width;em.line.Halphadoublenullablee_FWHMHa? Uncertainty on FWHMHa (FWHM_HA_BR_ERR)km/sstat.errordoublenullableWaveHa? Peak wavelength of the broad H {alpha} emission line (PEAK_HA_BR)0.1nmem.wl;em.line.Halphadoublenullablee_WaveHa? Uncertainty on WaveHa (PEAK_HA_BR_ERR)0.1nmstat.errordoublenullableEWHaEquivalent width of the broad H {alpha} emission line (EW_HA_BR)0.1nmspect.line.eqWidth;em.line.Halphachare_EWHaUncertainty on EWHa (EW_HA_BR_ERR)0.1nmstat.errorcharlogLHa? Logarithm of the luminosity of the broad H {alpha} emission line (LOGL_HA_BR)1e-07Wphys.luminosity;spect.line;em.line.Halphadoublenullablee_logLHa? Uncertainty on logLHa (LOGL_HA_BR_ERR)1e-07Wstat.errordoublenullableq_logLHa? Quality flag indicator on logLHa (QUALITY_HA) (4)meta.code.qualintnullableFWHMHb? Full-width at half-maximum of the broad H {bata} emission line (FWHM_HB_BR)km/sspect.line.width;em.line.Hbetadoublenullablee_FWHMHb? Uncertainty on FWHMHb (FWHM_HB_BR_ERR)km/sstat.errordoublenullableWaveHb? Peak wavelength of the broad H {beta} emission line (PEAK_HB_BR)0.1nmem.wl;em.line.Hbetadoublenullablee_WaveHb? Uncertainty on WaveHb (PEAK_HB_BR_ERR)0.1nmstat.errordoublenullableEWHbEquivalent width of the broad H{beta} emission line (EW_HB_BR)0.1nmspect.line.eqWidth;em.line.Hbetachare_EWHbUncertainty on EWHb (EW_HB_BR_ERR)0.1nmstat.errorcharlogLHb? Logarithm of the luminosity of the broad H {beta} emission line (LOGL_HB_BR)1e-07Wphys.luminosity;spect.line;em.line.Hbetadoublenullablee_logLHb? Uncertainty on logLHb (LOGL_HB_BR_ERR)1e-07Wstat.errordoublenullableq_logLHb? Quality flag indicator on logLHb (QUALITY_HB) (5)meta.code.qualintnullableFWHMMgII? Full-width at half-maximum of the broad Mg II emission line (FWHM_MGII_BR)km/sspect.line.width;em.UV.200-300nmdoublenullablee_FWHMMgII? Uncertainty on FWHMmgII (FWHM_MGII_BR_ERR)km/sstat.errordoublenullableWaveMgII? Peak wavelength of the broad Mg II emission line (PEAK_MGII_BR)0.1nmem.wl;em.UV.200-300nmdoublenullablee_WaveMgII? Uncertainty on WavemgII (PEAK_MGII_BR_ERR)0.1nmstat.errordoublenullableEWMgII? Equivalent width of the broad Mg II emission line (EW_MGII_BR)0.1nmspect.line.eqWidth;em.UV.200-300nmdoublenullablee_EWMgII? Uncertainty on EWmgII (EW_MGII_BR_ERR)0.1nmstat.errordoublenullableSepMgIIFlag for modelled MgII region method (MGII_SEP) (9)meta.codeintTypeLineFlag for AGN types 1 broad line as B 595 times and narrow line as N 101 times (LINEWIDTH)src.classcharMBH1? The BH mass estimate from FWHMHa and logL5100 (MASS_HA_5100_MR16) (10)solMassphys.massdoublenullableMBH2? The BH mass estimate from FWHMHa and logLHa (MASS_HA_HA_MR16) (10)solMassphys.massdoublenullableMBH3? The BH mass estimate from FWHMHb and logL5100 (MASS_HB_5100_MR16) (10)solMassphys.massdoublenullableMBH4? The BH mass estimate from FWHMHb and logLHb (MASS_HB_HB_G10) (11)solMassphys.massdoublenullableMBH5? The BH mass estimate from FWHMmgII and logL3000 (MASS_MGII_3000_MR16) (10)solMassphys.massdoublenullableMBH6? The BH mass estimate from FWHMmgII and logLmgII (MASS_MGII_MGII_W18) (12)solMassphys.massdoublenullableMBH7? The BH mass estimate from FWHMHa and logL5100 using the calibrated relation in section 4 of this work (MASS_HA_5100_K23)solMassphys.massdoublenullableMBH8? The BH mass estimate from FWHMHa and logLHa using the calibrated relation in section 4 of this work (MASS_HA_HA_K23)solMassphys.massdoublenullableMBH9? The BH mass estimate from FWHMHb and logLHb using the calibrated relation in section 4 of this work (MASS_HB_HB_K23)solMassphys.massdoublenullableMBH10? The BH mass estimate from FWHMmgII and logL3000 using the calibrated relation in section 4 of this work (MASS_MGII_3000_K23)solMassphys.massdoublenullableMBH11? The BH mass estimate from FWHMmgII and logLmgII using the calibrated relation in section 4 of this work (MASS_MGII_MGII_K23)solMassphys.massdoublenullableQHa5100? Quality flag for MBH1 and MBH7 (Q_MASS_HA_5100) (13)meta.code.qualfloatnullableQHB5100? Quality flag for MBH3 and MBH (Q_MASS_HB_5100) (14)meta.code.qualfloatnullableQMgII3000? Quality flag for MBH5 and MBH10 (Q_MASS_MGII_3000) (15)meta.code.qualfloatnullableMBHLogarithm of our preferred BH mass estimate (LOG_MASS_PREF_VALUE)solMassphys.massdoublef_MBHFlag for which BH mass estimate is the preferred one (LOG_MASS_PREF_SOURCE) (7)meta.codecharObsIDThe XMM-Newton obsID for the X-ray and OM photometric data from 4XMM-DR9 of Webb et al. 2020A&A...641A.136W, Cat. IX/59 (XMM_OBSID)meta.id.assocSourceThe unique X-ray source number taken from the 4XMM-DR9 of Webb et al. 2020A&A...641A.136W, Cat. IX/59 (XMM_SRCID)meta.id.assoclogL2keVLogarithm of monochromatic X-ray L{nu}_2keV_ flux at rest-frame 2 keV estimated from the XMM-Newton band fluxes as seen in sect 3.2 (LOG_L2KEV)1e-07W.Hz**-1phys.luminosity;em.X-ray.softfloate_logL2keVUncertainty on logL2keV (LOG_L2KEV_ERR)1e-07W.Hz**-1stat.errordoubleGammaXEstimated X-ray photon index as seen in section 3.2 (GAMMA_X)spect.index;em.X-ray.softdoublee_GammaXUncertainty on GammaX (GAMMA_X_ERR)stat.errordoublealphaOX? Optical-X-ray energy index (ALPHA_OX) (16)spect.index;arith.ratio;em.X-ray.softdoublenullablee_alphaOX? Uncertainty on alphaOX (ALPHA_OX_ERR)stat.errordoublenullablef_alphaOXThe L2500 column measurement used to calculate UV/X-ray energy index {alpha}_ox_ (LOG_L2500_ALPHA_OX)meta.codecharn_RLThe L4400 column measurement used to calculate RL radio loudness energy index (LOG_L4400_R_LOUD)meta.notecharBalmerFlag for Balmer lines as K23 for this work 60 times and as R20 636 times for Rakshit et al. 2020ApJS..249...17R, Cat. J/ApJS/249/17 (BALMER_SOURCE)meta.codecharMgIIFlag for Mg II as K23 for this work 100 times and as R20 596 times for Rakshit et al. 2020ApJS..249...17R, Cat. J/ApJS/249/17 (MGII_SOURCE)meta.codechar