230 citations · 379 across the 6 of their papers we have counts for
6 papers
The New Generation Atlas of Quasar Spectral Energy Distributions from Radio to X-rays
Zhaohui Shang, Michael Brotherton, Beverley J Wills +14
We have produced the next generation of quasar spectral energy distributions (SEDs), essentially updating the work of Elvis et al. (1994) by using high-quality data obtained with s…
Spectral Properties From Lyman-alpha to H-alpha For An Essentially Complete Sample of Quasars I: Data
Zhaohui Shang, Beverley J. Wills, D. Wills +1
We have obtained quasi-simultaneous ultraviolet-optical spectra for 22 out of 23 quasars in the complete PG-X-ray sample with redshift, z<0.4, and M_B<-23. The spectra cover rest-f…
The Baldwin Effect and Black Hole Accretion: A Spectral Principal Component Analysis of a Complete QSO Sample
Zhaohui Shang, Beverley J. Wills, Edward L. Robinson +4
A unique set of UV-optical spectrograms of 22 low redshift QSOs are investigated using principal component analysis. We find three significant principal components over the broad w…
Absorption and scattering properties in polarized bright soft X-ray selected ROSAT AGN
D. Grupe, Beverley J. Wills, D. Wills +1
We have surveyed the optical linear polarimetric properties of 65 soft X-ray selected ROSAT Active Galactic Nuclei (AGN). Most of these sources show low polarization (<1%) and no o…
The PG X-Ray QSO Sample: Links among X-ray, UV & Optical Spectra
Beverley J. Wills, M. S. Brotherton, A. Laor +3
A unique, essentially complete sample of 22 QSOs, with high quality soft X-ray spectra from ROSAT, as well as HST and optical spectrophotometry from below Ly-alpha to above H-alpha…
Optical Identification of Quasar 0917+7122 in the Direction of an Extreme-Ultraviolet Source
Dan Maoz, Eran Ofek, Amotz Shemi +6
We report the optical identification of an mag, quasar at the position of a 6 cm radio source and a faint \rosat PSPC X-ray source. The quasar lies within the er…