Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-02-11
Astronomy and Astrophysics
Astrophysics
4 pages, 1 colour figures. To appear in the Proceedings of the Symposium on `New Visions of the X-ray Universe in the XMM-Newt
Scientific paper
The ionized disc reflection model of Ross & Fabian is applied to a sample of five Seyfert 1 galaxies observed by BeppoSAX. Good fits were obtained for all the objects in the sample. NGC 4051 and Mkn 335 (usually classified as NLSy 1s) show evidence of a highly ionized accretion disc (xi ~ 350 erg cm s^{-1} and xi \~ 800 erg cm s^{-1}). While NGC 3783 seems to be a ``pure Sy 1'' characterized by a highly ionized accretion disc (xi ~ 500 erg cm s^{-1}). All the sources are consistent with having a face-on disc. The accurate determination of the continuum emission allows us to investigate the spectral variability in the case of Mkn 509.
Ballantyne David R.
Fabian Andrea C.
Piro Luigi
Rosa Adriano de
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