67 citations · 104 across the 4 of their papers we have counts for
4 papers
Properties of warm absorbers in active galaxies
Stefanie Komossa, Henner Fink
We present a study of the nature of warm absorbers on the basis of ROSAT X-ray observations and photoionization calculations carried out with the code Cloudy. We focus on `non-stan…
ROSAT All-Sky Survey observations of IRAS galaxies; I. Soft X-ray and far-infrared properties
Th. Boller, F. Bertoldi, M. Dennefeld +1
The 120,000 X-ray sources detected in the RASS II processing of the ROSAT All-Sky Survey are correlated with the 14,315 IRAS galaxies selected from the IRAS Point Source Catalogue:…
A ROSAT observation of the warm-absorbed soft X-ray spectrum of NGC 4051
Stefanie Komossa, Henner Fink
We present and analyze a pointed ROSAT PSPC observation of the Seyfert galaxy NGC 4051. The X-ray spectrum consists of a powerlaw modified by absorption edges and an additional sof…
Soft X-ray properties of "narrow-line" Seyfert 1 galaxies
Th. Boller, W. N. Brandt, H. Fink
We report on AGN with extremely soft X-ray spectra observed with ROSAT. From their optical emission lines these objects are classified as narrow-line Seyfert 1 galaxies (NLS1), alm…