423 citations · 2.6k across the 46 of their papers we have counts for
Showing 1998Show all
3 papers · 1 filter
astro-ph1998★ 4 cited
One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays
G. Matt, M. Guainazzi, R. Maiolino +11
The Circinus Galaxy has been observed, for the first time above 10 keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1--10 keV spectrum is apparent in…
astro-ph1998★ 9 cited
The Equilibrium Photoionized Absorber in 3C351
F. Nicastro, F. Fiore, M. Elvis +1
We present two ROSAT PSPC observations of the radio-loud, lobe-dominated quasar 3C 351, which shows an `ionized absorber' in its X-ray spectrum. The factor 1.7 change in flux in th…
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…