105 citations · 138 across the 3 of their papers we have counts for
3 papers
astro-ph2005★ 11 cited
Non-Thermal Emission from AGN Coronae
G. Torricelli, P. Pietrini, A. Orr
Accretion disk coronae are believed to account for X-ray emission in Active Galactic Nuclei (AGNs). In this paper the observed emission is assumed to be due to a population of rela…
astro-ph2001★ 22 cited
BeppoSAX spectroscopy of MR 2251-178: a test for ionized reflection in radio quiet QSOs
A. Orr, P. Barr, M. Guainazzi +3
We present the 0.1-200 keV BeppoSAX spectrum of MR 2251-178 observed at two epochs in 1998 separated by 5 months. Both epochs show identical spectral shape and X-ray flux. Analysis…
astro-ph1998★ 105 cited
The swan song: the disappearance of the nucleus of NGC 4051 and the echo of its past glory
M. Guainazzi, F. Nicastro, F. Fiore +10
BeppoSAX observed the low-luminous Seyfert 1 Galaxy NGC4051 in a ultra-dim X-ray state. The 2-10 keV flux (1.26 x 10^{-12} erg/cm^2/s) was about 20 times fainter than its historica…