Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-11
Nucl.Phys.Proc.Suppl.132:217-220,2004
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures. Proc. of the meeting: "The Restless High-Energy Universe" (Amsterdam, The Netherlands), E.P.J. van den Heu
Scientific paper
10.1016/j.nuclphysbps.2004.04.03
We present preliminary results of the spectral analysis of a large sample of Seyfert galaxies observed by BeppoSAX. The only selection criterium was a sufficiently large S/N ratio (>10) in the PDS band (12-200 keV) to allow good detection up to the highest energy. The resulting sample is composed of 28 objects (17 Seyfert 1, 11 Seyfert 2) and 50 observations. Our main effort here is to adopt Comptonization models to fit the different spectra on a truly broad band basis (0.1-200 keV). We use two distinct disc-corona configurations, an anisotropic slab and an isotropic spherical one. We discuss the distributions of the physical parameters, like temperature and optical depth of the corona and the reflection component, among this sample. We also discussed the existence (or inexistence) of correlations between these parameters.
Dadina Mauro
Petrucci Pierre Olivier
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