140 citations · 406 across the 4 of their papers we have counts for
9 papers
On the variability of quasars: a link between Eddington ratio and optical variability?
B. C. Wilhite, R. J. Brunner, C. J. Grier +2
Repeat scans by the Sloan Digital Sky Survey (SDSS) of a 278 square degree stripe along the Celestial equator have yielded an average of over 10 observations each for nearly 8,000…
The Effect of Variability on the Estimation of Quasar Black Hole Masses
B. C. Wilhite, R. J. Brunner, D. P. Schneider +1
We investigate the time-dependent variations of ultraviolet (UV) black hole mass estimates of quasars in the Sloan Digital Sky Survey (SDSS). From SDSS spectra of 615 high-redshift…
Broad Absorption Line Variability in Repeat Quasar Observations from the Sloan Digital Sky Survey
Britt F. Lundgren, Brian C. Wilhite, Robert J. Brunner +5
We present a time-variability analysis of 29 broad absorption line quasars (BALQSOs) observed in two epochs by the Sloan Digital Sky Survey (SDSS). These spectra are selected from…
A Synoptic, Multiwavelength Analysis of a Large Quasar Sample
Adam W. Rengstorf, Robert J. Brunner, Brian C. Wilhite
We present variability and multi-wavelength photometric information for the 933 known quasars in the QUEST Variability Survey. These quasars are grouped into variable and non-varia…
Spectral Variability of Quasars in the Sloan Digital Sky Survey. II: The C IV Line
B. C. Wilhite, D. E. Vanden Berk, R. J. Brunner +1
We examine the variability of the high-ionizaton C IV line in a sample of 105 quasars observed at multiple epochs by the Sloan Digital Sky Survey. We find a strong correlation betw…
Characteristic QSO Accretion Disk Temperatures from Spectroscopic Continuum Variability
Nicolas A. Pereyra, Daniel E. Vanden Berk, David A. Turnshek +5
Using Sloan Digital Sky Survey (SDSS) quasar spectra taken at multiple epochs, we find that the composite flux density differences in the rest frame wavelength range 1300-6000 AA c…