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dc.contributor.authorGrier, C. J.
dc.contributor.authorShen, Yue
dc.contributor.authorHorne, Keith
dc.contributor.authorBrandt, W. N.
dc.contributor.authorTrump, J. R.
dc.contributor.authorHall, P. B.
dc.contributor.authorKinemuchi, K.
dc.contributor.authorStarkey, David
dc.contributor.authorSchneider, D. P.
dc.contributor.authorHo, Luis C.
dc.contributor.authorHomayouni, Y.
dc.contributor.authorLi, Jennifer I-hsiu
dc.contributor.authorMcGreer, Ian D.
dc.contributor.authorPeterson, B. M.
dc.contributor.authorBizyaev, Dmitry
dc.contributor.authorChen, Yuguang
dc.contributor.authorDawson, K. S.
dc.contributor.authorEftekharzadeh, Sarah
dc.contributor.authorGuo, Yucheng
dc.contributor.authorJia, Siyao
dc.contributor.authorJiang, Linhua
dc.contributor.authorKneib, Jean-Paul
dc.contributor.authorLi, Feng
dc.contributor.authorLi, Zefeng
dc.contributor.authorNie, Jundan
dc.contributor.authorOravetz, Audrey
dc.contributor.authorOravetz, Daniel
dc.contributor.authorPan, Kaike
dc.contributor.authorPetitjean, Patrick
dc.contributor.authorPonder, Kara A.
dc.contributor.authorRogerson, Jesse
dc.contributor.authorVivek, M.
dc.contributor.authorZhang, Tianmeng
dc.contributor.authorZou, Hu
dc.identifier.citationGrier , C J , Shen , Y , Horne , K , Brandt , W N , Trump , J R , Hall , P B , Kinemuchi , K , Starkey , D , Schneider , D P , Ho , L C , Homayouni , Y , Li , J I , McGreer , I D , Peterson , B M , Bizyaev , D , Chen , Y , Dawson , K S , Eftekharzadeh , S , Guo , Y , Jia , S , Jiang , L , Kneib , J-P , Li , F , Li , Z , Nie , J , Oravetz , A , Oravetz , D , Pan , K , Petitjean , P , Ponder , K A , Rogerson , J , Vivek , M , Zhang , T & Zou , H 2019 , ' The Sloan Digital Sky Survey Reverberation Mapping Project: Initial C IV lag results from four years of data ' , Astrophysical Journal , vol. 887 , no. 1 , 38 , pp. 1-27 .
dc.identifier.othercrossref: 10.3847/1538-4357/ab4ea5
dc.descriptionK.H. acknowledges support from STFC grant ST/M001296/1.en
dc.description.abstractWe present reverberation-mapping (RM) lags and black hole mass measurements using the C iv λ1549 broad emission line from a sample of 348 quasars monitored as a part of the Sloan Digital Sky Survey RM Project. Our data span four years of spectroscopic and photometric monitoring for a total baseline of 1300 days, allowing us to measure lags up to ~750 days in the observed frame (this corresponds to a rest-frame lag of ~300 days in a quasar at z = 1.5 and ~190 days at z = 3). We report significant time delays between the continuum and the C iv λ1549 emission line in 48 quasars, with an estimated false-positive detection rate of 10%. Our analysis of marginal lag measurements indicates that there are on the order of ~100 additional lags that should be recoverable by adding more years of data from the program. We use our measurements to calculate black hole masses and fit an updated C iv radius–luminosity relationship. Our results significantly increase the sample of quasars with C iv RM results, with the quasars spanning two orders of magnitude in luminosity toward the high-luminosity end of the C iv radius–luminosity relation. In addition, these quasars are located at some of the highest redshifts (z ≈ 1.4–2.8) of quasars with black hole masses measured with RM. This work constitutes the first large sample of C iv RM measurements in more than a dozen quasars, demonstrating the utility of multiobject RM campaigns.
dc.relation.ispartofAstrophysical Journalen
dc.subjectReverberation mappingen
dc.subjectActive galactic nucleien
dc.subjectSupermassive black holesen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleThe Sloan Digital Sky Survey Reverberation Mapping Project: Initial C IV lag results from four years of dataen
dc.typeJournal articleen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.description.statusPeer revieweden

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