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The formation of the Seyfert continuum
P. O. Petrucci
We discuss recent results on the Seyfert spectral variability. Their observed high energy variability is generally consistent with X-ray spectral slop fluctuations produced by chan…
Compton reflection and iron fluorescence in BeppoSAX observations of Seyfert type 1 galaxies
G. C. Perola, G. Matt, M. Cappi +5
A sample of nine bright Seyfert 1 and NELG type galaxies, observed with BeppoSAX, is analyzed to assess on a truly broad band basis (0.1-200 keV) the issue of the spectral contribu…
A rapidly variable narrow X-ray iron line in Mkn 841
P. O. Petrucci, G. Henri, L. Maraschi +8
We report on the detection of a rapidly variable narrow Fe K line in Mkn 841. The source has been observed two times by XMM-Newton and simultaneously with BeppoSAX. The two obse…
The BeppoSAX broad-band spectrum and variability of the Seyfert 1 NGC 3783
A. De Rosa, L. Piro, F. Fiore +5
BeppoSAX observed the Seyfert 1 galaxy NGC 3783 for ~ 5 days from 1998 June 6 to 1998 June 10. The average flux during the observation was F(2-10 keV) ~ 6 X 10^{-11} erg cm^-2 s^-1…
Long Term Spectral Variability of Seyfert Galaxies from RXTE Color-Flux Diagrams
I. E. Papadakis, P. O. Petrucci, L. Maraschi +3
We present results from RXTE data obtained during a systematic monitoring program of four Seyfert galaxies (NGC5548, NGC5506, MCG-6-30-15 and NGC4051). We studied the variability o…