J/ApJS/282/56ivo://CDS.VizieR/J/ApJS/282/56CDSBai H.-R.Du PuHu C.Chen Y.-J.Yao Z.-H.Li Y.-R.Fu Y.-X.,Wang Y.-L.Zhao YuZhang H.Liu J.-R.Yang S.Peng Y.-C.Fang F.-N.,Songsheng Y.-Y.Xiao M.Zhai S.Li S.-S.Lu K.-X.Zhang Z.-X.,Bao D.-W.Guo W.-J.Feng J.-Q.Zhao Y.-P.Aceituno J.Bai J.-M.,Ho L.C.Wang J.-M.SEAMBH Collaboration2026-09-04T14:35:01Z2026-09-04T15:23:31ZCDS support team

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

cds-question@unistra.fractive-galactic-nucleiblack-holesvisible-astronomyspectroscopyphotometryredshiftedAs the 15th paper in a series reporting on a large reverberation mapping (RM) campaign of super-Eddington accreting massive black holes (SEAMBHs) in active galactic nuclei (AGNs), we present the results of measurements of the MgII lines in 18 SEAMBHs monitored spectroscopically from 2017 to 2024. Among these, the time lags of MgII have been successfully determined for eight of the 18 objects, thereby expanding the current Mg ii RM sample, particularly at higher accretion rates. By incorporating measurements of the line widths, we determine the masses of their central supermassive black holes. Based on these new measurements, we update the relation between the MgII radius and the monochromatic luminosity at 3000{AA} (R_MgII_-L_3000_ relation), yielding a slope of 0.24{\pm}0.03, which is slightly shallower than, yet still consistent with, previously reported values. Similar to the H{beta} lines, the Mg ii time lags in SEAMBHs are shorter than those of AGNs with normal accretion rates at comparable luminosities. The deviation of AGNs from the best-fit R_MgII_-L_3000_ relation shows a strong correlation with the accretion rate, while no significant correlation is found between the deviation and the flux ratio of UV iron to MgII.2026ApJS..282...56Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/282/56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)J/ApJS/152/251 : Indo-US library of coude feed stellar spectra (Valdes+, 2004)J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)J/ApJ/687/78 : FeII emission in quasars (Hu+, 2008)J/ApJ/680/169 : SDSS DR5 virial black hole masses (Shen+, 2008)J/ApJ/736/86 : FeII emission in SDSS type 1 AGNs (Dong+, 2011)J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)J/ApJ/755/60 : Reverberation mapping for 5 Seyfert 1 galaxies (Grier+, 2012)J/ApJ/753/125 : NIR spectroscopy follow-up of 60 SDSS-DR7 QSOs (Shen+, 2012)J/ApJ/782/45 : SEAMBHs. I. Mrk 142, Mrk 335, and IRAS F12397+3333 (Du+, 2014)J/A+A/562/A34 : UV FeII template from LBQS 2113-4538 (Hryniewicz+, 2014)J/ApJ/793/108 : SEAMBHs. II. Continuum and Hbeta LCs (Wang+, 2014)J/ApJS/217/26 : Lick AGN monitoring 2011: light curves (Barth+, 2015)J/ApJ/806/22 : SEAMBHs IV. H{beta} time lags (Du+, 2015)J/ApJ/825/126 : SEAMBHs. V. The third year (Du+, 2016)J/ApJ/818/L14 : RM AGNs accretion rates and BH masses (Du+, 2016)J/ApJ/821/56 : Space telescope RM project. III. NGC5548 (Fausnaugh+, 2016)J/ApJ/818/30 : Lag measurements for z<0.8 QSOs from the SDSS-RM (Shen+, 2016)J/ApJ/843/30 : MgII line vs 3000{AA} cont. analysis in 68 QSOs (Zhu+, 2017)J/ApJ/866/133 : Continuum-H{beta} light curves of 5 Seyfert 1 (De Rosa+, 2018)J/ApJ/869/142 : Monitoring AGNs with H{beta} Asymmetry (MAHA). I. (Du+, 2018)J/ApJ/856/6 : SEAMBHs IX. 10 new H{beta} light curves (Du+, 2018)J/ApJ/865/56 : Emission line & R-band continuum LCs of 17 QSOs (Lira+, 2018)J/ApJ/880/46 : Spectroscopy & V-band monitoring of CTS C30.10 (Czerny+, 2019)J/ApJ/886/42 : Reverberation mapping & opt. spectra data of AGNs (Du+, 2019)J/ApJS/241/34 : The SDSS Reverberation Mapping (SDSS-RM) project (Shen+, 2019)J/ApJ/901/55 : SDSS-RM project: MgII lags from 4yrs obs. (Homayouni+, 2020)J/ApJ/903/86 : 68 active galactic nuclei properties (Martinez-Aldama+, 2020)J/ApJS/253/20 : SEAMBHs XII. Reberberation mapping for 15 PG QSOs (Hu+, 2021)J/ApJ/925/52 : LAMP 2016: velocity-resolved Hb lags in Sy galaxies (U+, 2022)J/ApJS/278/61 : Supermassive BH with accretion rates in AGN. XIV. (Hu+, 2025)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/282/56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/282/56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/282/56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/282/56https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/282/56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/282/56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/282/56/table1 (Objects and observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/282/56/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/282/56/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/282/56/table1?GETtext/xml+votable180.050000true125.910379759.44679470.0055555555555555566/4243 4527 4992 5274 5305 5352 5759 5835 5880 6488 7172 7302 7359 7362 7552 7560 27341https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/282/56?format=asciiOpticaldefaultJ/ApJS/282/56/table1Objects and observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSObject SDSS name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharprimaryz[0.7/0.9] Redshiftsrc.redshiftfloatObsName of observatory (Lijiang or CAHA)meta.id;instr.obstycharFiltFilter used for the photometric observationsinstr.setup;instr.filtercharStartStart date of monitoring at Lijiang and CAHAtime.startnullableEndEnd date of monitoring at Lijiang and CAHAtime.endnullableNsp[36/107] Number of spectroscopic epochsmeta.numberintTmed[14/21] Median sampling cadencedinstr.setup;time;stat.medianintDur[1467/2408] Total duration of the entire spectroscopic monitoring perioddtime.intervalintRACComparison star hour of right ascension (J2000) (1)pos.eq.raSimbadNameSimbad column added by the CDSmeta.idcharnullableNEDNED column added by the CDSmeta.ref.urlcharLEDAmeta.ref.urlcharLCcInteractive continuum LC Plotmeta.ref.urlcharDECComparison star degree of declination (J2000) (1)pos.eq.decNpNumber of photometry measurements for this source (link to Table 2)meta.numberintnullableLCMgIIInteractive MgII line LC Plotmeta.ref.urlcharSloanDisplay the online SDSS-DR19 data for the nearest objectmeta.ref.urlchar_RAPositions from SDSS in SIMBAD (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS in SIMBAD (declination part)degpos.eq.dec;meta.mainJ/ApJS/282/56/table2Light curvesSDSSObject SDSS name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharF3000[2.16/8.7]? Flux, spectroscopic continuum, 10^-16^erg/s/cm2/{AA}1e-16cW.m**-2.nm**-1phot.flux.density;spect.continuumfloatnullablee_F3000[0.05/0.4]? Uncertainty in F30001e-16cW.m**-2.nm**-1stat.error;phot.flux.density;spect.continuumfloatnullableFMgII[4/18.7]? Flux, MgII line, 10^-15^erg/s/cm21e-15mW.m**-2phot.flux;spect.linefloatnullablee_FMgII[0.05/1.1]? Uncertainty in FMgII1e-15mW.m**-2stat.error;phot.flux;spect.linefloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSNameShort name used in this work (JHHMMSS)meta.idcharJDphot? Julian date of photometric observationdtime.epochdoublenullableFphot[2/8.9]? Flux, photometric continuum, 10^-16^erg/s/cm2/{AA}1e-16cW.m**-2.nm**-1phot.flux.density;spect.continuumfloatnullablee_Fphot[0.014/0.9]? Uncertainty in Fphot1e-16cW.m**-2.nm**-1stat.error;phot.flux.density;spect.continuumfloatnullableJDspec? Julian date of spectroscopic observationdtime.epochdoublenullable