2 citations · 4 across the 3 of their papers we have counts for
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PG 1254+047: An Intrinsically X-ray Weak, Heavily Absorbed BALQSO?
Bassem M. Sabra, Fred Hamann
We present \textit{Chandra} observations of the radio-quiet Broad Absorption Line (BAL) QSO PG 1254+047. We find that it is a weak X-ray source, with a total of photons m…
HST UV and Keck HIRES Spectra of BAL Quasars
V. Junkkarinen, R. D. Cohen, T. A. Barlow +1
In the analysis of broad absorption line (BAL) quasar spectra, Keck HIRES spectra are a useful complement to lower resolution HST and ground based spectra. The HIRES spectra provid…
X-Ray Absorption Associated with High-Velocity UV Absorbers
B. M. Sabra, F. Hamann, J. C. Shields +2
We present Chandra observations of two radio-quiet QSOs, PG 2302+029 and PG 1254+047. PG 2302+029 has an ultra high-velocity UV absorption system -56,000 km/s, while PG 1254+047 is…
High Redshift Quasars and Star Formation History
Matthias Dietrich, Fred Hamann
Quasars are among the most luminous objects in the universe, and they can be studied in detail up to the highest known redshift. Assuming that the gas associated with quasars is cl…