Soft excesses of hard X-ray selected Seyfert 1 galaxies.
Abstract
The origin of the soft excess component in emission line is still an open issue. The authors have selected the Seyfert 1 galaxies observed by the GINGA satellite (2 - 20 keV) and have analysed the ROSAT data (0.1 - 2 keV) of this sample, with the aim of determining the spectrum of the soft excess adopting the underlying continuum as measured by GINGA. The authors present their results and discuss the implication on the current models of the soft X-ray excess.
- Publication:
-
Memorie della Societa Astronomica Italiana
- Pub Date:
- 1996
- Bibcode:
- 1996MmSAI..67..551R
- Keywords:
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- Seyfert Galaxies: Soft X Rays;
- Seyfert Galaxies: X-Ray Surveys;
- Seyfert Galaxies: Radiation Mechanisms