151 citations · 493 across the 11 of their papers we have counts for
11 papers
New bright soft X-ray selected ROSAT AGN: I. Infrared-to-X-ray spectral energy distributions
D. Grupe, K. Beuermann, H. -C. Thomas +2
We present results of an infrared-to-X-ray study of 76 bright soft X-ray selected Seyfert galaxies discovered in the ROSAT All-Sky Survey. These objects are characterized by steep…
Soft X-ray properties of the Seyfert 1.8 galaxy NGC 3786
Stefanie Komossa, Henner Fink
An analysis of survey and pointed ROSAT PSPC observations of the Seyfert 1.8 galaxy NGC 3786 has revealed interesting spectral and temporal behaviour. The spectrum is found to show…
Multiwavelength Monitoring of the BL Lacertae Object PKS 2155-304 in May 1994. II. The IUE Campaign
Elena Pian, C. Megan Urry, Aldo Treves +16
PKS 2155-304, the brightest BL Lac object in the ultraviolet sky, was monitored with the IUE satellite at ~1 hour time-resolution for ten nearly uninterrupted days in May 1994. The…
ROSAT monitoring of persistent giant and rapid variability in the narrow-line Seyfert 1 galaxy IRAS 13224-3809
Th. Boller, W. N. Brandt, A. C. Fabian +1
We report evidence for persistent giant and rapid X-ray variability in the radio-quiet, ultrasoft, strong Fe II, narrow-line Seyfert 1 galaxy IRAS 13224-3809. Within a 30 day ROSAT…
ROSAT observations of warm absorbers in AGN
Stefanie Komossa, Henner Fink
We study the properties of warm absorbers in several active galaxies (AGN) and present new candidates, using ROSAT X-ray observations. Several aspects of the characteristics of war…
ROSAT Soft X-Ray Properties of the Large Bright Quasar Survey: Modeling of Stacked X-Ray Spectra
Norbert Schartel, Paul J. Green, Scott F. Anderson +6
We develop and apply a novel method of analysis to study the X-ray spectral properties of 908 QSOs in the Large Bright Quasar Survey (LBQS) that were observed during the soft X-ray…