6 citations · 12 across the 5 of their papers we have counts for
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The complex X-ray spectra of active galaxies with warm absorbers
Stefanie Komossa
Warm absorbers are an important new probe of the central regions of active galaxies. So far, they revealed their existence mainly in the soft X-ray spectral region. In observing an…
The ROSAT view of NGC 1365 and the luminous highly variable off-nuclear X-ray source NGC 1365 - X1
Stefanie Komossa, Hartmut Schulz
We present an X-ray spectral and spatial analysis of the composite starburst/Seyfert galaxy NGC 1365. Excellent fits of the ROSAT PSPC spectrum are obtained by combining a soft the…
The ROSAT view of NGC 1365: core emission, the highly variable source NGC 1365--X1 and alignments of surrounding X-ray sources
Stefanie Komossa, Hartmut Schulz
We present a spectral and spatial analysis of the nuclear and circumnuclear X-ray emission of the prominent southern starburst/Seyfert galaxy NGC 1365. To describe the X-ray spectr…
The ULIRG NGC 6240: Luminous extended X-ray emission and evidence for an AGN
Hartmut Schulz, Stefanie Komossa, Jochen Greiner
We briefly review and extend our discussion of the ROSAT detection of the extraordinarily luminous (>10^{42} erg/s) partly extended (> 30 kpc diameter) X-ray emission from the doub…
The giant-amplitude X-ray outburst in NGC 5905 - a tidal disruption event ?
Stefanie Komossa, Norbert Bade
NGC 5905 is one of the very few galaxies that underwent a giant X-ray outburst, with a change in photon countrate of a factor 100. The outburst spectrum is both, very soft and lumi…
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…