Space Telescope and Optical Reverberation Mapping Project VI:
  reverberating Disk Models for NGC 5548
  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
