Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-05-21
Mon.Not.Roy.Astron.Soc.334:L21,2002
Astronomy and Astrophysics
Astrophysics
5 pages, 6 figures, accepted for pubblication in MNRAS Letters
Scientific paper
10.1046/j.1365-8711.2002.05712.x
In this letter we present analysis of BeppoSAX data from a long look at the Seyfert 1 galaxy NGC 7469. The presence of a soft excess below 0.8 keV is confirmed by our analysis and no warm absorber component is required to fit the spectrum. A complex iron emission line and the Compton reflection hump are clearly detected. The profile of the line is too broad to associate this feature with distant matter. In addition, the observed soft excess and the energy of the iron line E_{Fe}=6.8 keV strongly support a scenario in which the hard X-rays are reprocessed by a photoionized accretion disc. This hypothesis was tested fitting the BeppoSAX spectrum with the ionized disc reflection model of Ross & Fabian. A second narrow line component, in addition to that produced in the disc, is also required to fit the observed iron line profile. A high energy cut-off around 150 keV is clearly detected in the spectrum.
Fabian Andrea C.
Piro Luigi
Rosa Adriano de
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