Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/32892
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dc.contributor.authorDe Rosa, G.-
dc.contributor.authorPeterson, B. M.-
dc.contributor.authorEly, J.-
dc.contributor.authorKriss, G. A.-
dc.contributor.authorCrenshaw, D. M.-
dc.contributor.authorHorne, K.-
dc.contributor.authorKorista, K. T.-
dc.contributor.authorNetzer, H.-
dc.contributor.authorPogge, R. W.-
dc.contributor.authorArevalo, P.-
dc.contributor.authorBarth, A. J.-
dc.contributor.authorBentz, M. C.-
dc.contributor.authorBrandt, W. N.-
dc.contributor.authorBreeveld, A. A.-
dc.contributor.authorBrewer, B. J.-
dc.contributor.authorBonta, E. D.-
dc.contributor.authorDe Lorenzo-Caceres, A.-
dc.contributor.authorDenney, K. D.-
dc.contributor.authorDietrich, M.-
dc.contributor.authorEdelson, R.-
dc.contributor.authorEvans, P. A.-
dc.contributor.authorFausnaugh, M. M.-
dc.contributor.authorGehrels, N.-
dc.contributor.authorGelbord, J. M.-
dc.contributor.authorGoad, Michael R.-
dc.contributor.authorGrier, C. J.-
dc.contributor.authorGrupe, D.-
dc.contributor.authorHall, P. B.-
dc.contributor.authorKaastra, J.-
dc.contributor.authorKelly, B. C.-
dc.contributor.authorKennea, J. A.-
dc.contributor.authorKochanek, C. S.-
dc.contributor.authorLira, P.-
dc.contributor.authorMathur, S.-
dc.contributor.authorMcHardy, I. M.-
dc.contributor.authorNousek, J. A.-
dc.contributor.authorPancoast, A.-
dc.contributor.authorPapadakis, I.-
dc.contributor.authorPei, L.-
dc.contributor.authorSchimoia, J. S.-
dc.contributor.authorSiegel, M.-
dc.contributor.authorStarkey, D.-
dc.contributor.authorTreu, T.-
dc.contributor.authorUttley, P.-
dc.contributor.authorVaughan, S.-
dc.contributor.authorVestergaard, M.-
dc.contributor.authorVillforth, C.-
dc.contributor.authorYan, H.-
dc.contributor.authorYoung, S.-
dc.contributor.authorZu, Y.-
dc.date.accessioned2015-08-05T11:21:30Z-
dc.date.available2015-08-05T11:21:30Z-
dc.date.issued2015-06-12-
dc.identifier.citationAstrophysical Journal, 2015, 806 (1), 128en
dc.identifier.issn0004-637X-
dc.identifier.urihttp://iopscience.iop.org/0004-637X/806/1/128/en
dc.identifier.urihttp://hdl.handle.net/2381/32892-
dc.description.abstractWe describe the first results from a six-month long reverberation-mapping experiment in the ultraviolet based on 171 observations of the Seyfert 1 galaxy NGC 5548 with the Cosmic Origins Spectrograph on the Hubble Space Telescope. Significant correlated variability is found in the continuum and broad emission lines, with amplitudes ranging from ~30% to a factor of two in the emission lines and a factor of three in the continuum. The variations of all the strong emission lines lag behind those of the continuum, with He ii λ1640 lagging behind the continuum by ~2.5 days and Lyα λ1215, C iv λ1550, and Si iv λ1400 lagging by ~5–6 days. The relationship between the continuum and emission lines is complex. In particular, during the second half of the campaign, all emission-line lags increased by a factor of 1.3–2 and differences appear in the detailed structure of the continuum and emission-line light curves. Velocity-resolved cross-correlation analysis shows coherent structure in lag versus line of sight velocity for the emission lines; the high-velocity wings of C iv respond to continuum variations more rapidly than the line core, probably indicating higher velocity broad-line region clouds at smaller distances from the central engine. The velocity-dependent response of Lyα, however, is more complex and will require further analysis.en
dc.language.isoenen
dc.publisherIOP Publishing LTDen
dc.rightsCopyright © The American Astronomical Society. All rights reserved. Deposited with reference to the publisher’s archiving policy available on the SHERPA/RoMEO website.en
dc.subjectScience & Technologyen
dc.subjectPhysical Sciencesen
dc.subjectAstronomy & Astrophysicsen
dc.subjectgalaxies: activeen
dc.subjectgalaxies: individual (NGC 5548)en
dc.subjectgalaxies: nucleien
dc.subjectgalaxies: Seyferten
dc.subjectACTIVE GALACTIC NUCLEIen
dc.subjectBROAD-LINE REGIONen
dc.subjectBLACK-HOLE MASSen
dc.subjectRADIUS-LUMINOSITY RELATIONSHIPen
dc.subjectPEAKED EMISSION-LINESen
dc.subjectTERM PROFILE VARIABILITYen
dc.subjectVELOCITY-DELAY MAPSen
dc.subjectH-BETA EMISSIONen
dc.subjectIONIZED ABSORPTIONen
dc.subjectQUASAR VARIABILITYen
dc.titleSPACE TELESCOPE AND OPTICAL REVERBERATION MAPPING PROJECT. I. ULTRAVIOLET OBSERVATIONS OF THE SEYFERT 1 GALAXY NGC 5548 WITH THE COSMIC ORIGINS SPECTROGRAPH ON HUBBLE SPACE TELESCOPEen
dc.typeJournal Articleen
dc.identifier.doi10.1088/0004-637X/806/1/128-
dc.identifier.eissn1538-4357-
dc.description.statusPeer-revieweden
dc.description.versionPublisher Versionen
dc.type.subtypeArticle;Journal-
pubs.organisational-group/Organisationen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERINGen
pubs.organisational-group/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomyen
dc.dateaccepted2015-04-24-
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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