123 citations · 262 across the 5 of their papers we have counts for
Showing 2001Show all
3 papers · 1 filter
astro-ph2001
X-ray bright optically quiet galaxies: the case of P3
A. Comastri, M. Brusa, P. Ciliegi +10
Recent X-ray surveys have clearly demonstrated that a population of optically dull, X-ray bright galaxies is emerging at X-ray fluxes of the order of 10-14 erg cm-2 s-1. The nature…
astro-ph2001★ 29 cited
On the nature of X-ray absorption in Seyfert 2 galaxies
M. Guainazzi, F. Fiore, G. Matt +1
We have studied the correlation among X-ray absorption, optical reddening and nuclear dust morphology in Seyfert 2 galaxies. Two main conclusions emerge: a) the Balmer decrement an…
astro-ph2001★ 3 cited
High Energy Large Area Surveys: from BeppoSAX to Chandra and XMM
F. Fiore, A. Comastri, F. La Franca +3
Optical identification of hard X-ray selected BeppoSAX and Chandra sources indicates that a large fraction of the sources are ``intermediate'' AGN, i.e. type 1.8-1.9 AGN, broad-lin…