Space Telescope and Optical Reverberation Mapping Project VI: reverberating Disk Models for NGC 5548
Creators: name: Starkey, D.
name: Horne, Keith
name: Fausnaugh, M. M.
name: Peterson, B. M.
name: Bentz, M. C.
name: Kochanek, C. S.
name: Denney, K. D.
name: Edelson, R.
name: Goad, M. R.
name: De Rosa, G.
name: Anderson, M. D.
name: Arevalo, P.
name: Barth, A. J.
name: Bazhaw, C.
name: Borman, G. A.
name: Boroson, T. A.
name: Bottorff, M. C.
name: Brandt, W. N.
name: Breeveld, A. A.
name: Cackett, E. M.
name: Carini, M. T.
name: Croxall, K. V.
name: Crenshaw, D. M.
name: Bonta, E. Dalla
name: De Lorenzo-Caceres, A.
name: Dietrich, M.
name: Efimova, N. V.
name: Ely, J.
name: Evans, P. A.
name: Filippenko, A. V.
name: Flatland, K.
name: Gehrels, N.
name: Geier, S.
name: Gelbord, J. M.
name: Gonzalez, L.
name: Gorjian, V.
name: Grier, C. J.
name: Grupe, D.
name: Hall, P. B.
name: Hicks, S.
name: Horenstein, D.
name: Hutchison, T.
name: Im, M.
name: Jensen, J. J.
name: Joner, M. D.
name: Jones, J.
name: Kaastra, J.
name: Kaspi, S.
name: Kelly, B. C.
name: Kennea, J. A.
name: Kim, S. C.
name: Kim, M.
name: Klimanov, S. A.
name: Korista, K. T.
name: Kriss, G. A.
name: Lee, J. C.
name: Leonard, D. C.
name: Lira, P.
name: MacInnis, F.
name: Manne-Nicholas, E. R.
name: Mathur, S.
name: McHardy, I. M.
name: Montouri, C.
name: Musso, R.
name: Nazarov, S. V.
name: Norris, R. P.
name: Nousek, J. A.
name: Okhmat, D. N.
name: Pancoast, A.
name: Parks, J. R.
name: Pei, L.
name: Pogge, R. W.
name: Pott, J. -U.
name: Rafter, S. E.
name: Rix, H. W.
name: Saylor, D. A.
name: Schimoia, J. S.
name: Schnulle, K.
name: Sergeev, S. G.
name: Siegel, M. H.
name: Spencer, M.
name: Sung, H. -I.
name: Teems, K. G.
name: Turner, C. S.
name: Uttley, P.
name: Vestergaard, M.
name: Villforth, C.
name: Weiss, Y.
name: Woo, J. -H.
name: Yan, H.
name: Young, S.
name: Zheng, W.
name: Zu, Y.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 to 9157 angstroms) combine simultaneous HST , Swift , and ground-based observations over a 180 day period from 2014 January to July. Light-curve variability is interpreted as the reverberation response of the accretion disk to irradiation by a central time-varying point source. Our model yields the disk inclination, i, temperature T1 at 1 light day from the black hole, and a temperature-radius slope, alpha. We also infer the driving light curve and find that it correlates poorly with both the hard and soft X-ray light curves, suggesting that the X-rays alone may not drive the ultraviolet and optical variability over the observing period. We also decompose the light curves into bright, faint, and mean accretion-disk spectra. These spectra lie below that expected for a standard blackbody accretion disk accreting at L/LEdd = 0.1
description: V2: Oops wrong title! V1: Accepted for publication in ApJ, 20 Pages, 11 Figures