114 citations · 303 across the 3 of their papers we have counts for
3 papers
The Intrinsically X-ray Weak Quasar PHL 1811. II. Optical and UV Spectra and Analysis
Karen M. Leighly, Jules P. Halpern, Edward B. Jenkins +1
This is the second of two papers reporting observations and analysis of the unusually bright (m_b=14.4), luminous (M_B=-25.5), nearby (z=0.192) narrow-line quasar PHL 1811. The fir…
The Intrinsically X-ray Weak Quasar PHL 1811. I. X-ray Observations and Spectral Energy Distribution
Karen M. Leighly, Jules P. Halpern, Edward B. Jenkins +3
This is the first of two papers reporting observations and analysis of the unusually bright (m_b=14.4), luminous (M_B=-25.5), nearby (z=0.192) narrow-line quasar PHL 1811, focusing…
Multiwavelength observations of short time-scale variability in NGC 4151. I. Ultraviolet observations
D. M. Crenshaw et al
We present the results of an intensive ultraviolet monitoring campaign on the Seyfert 1 galaxy NGC 4151, as part of an effort to study its short time-scale variability over a broad…