5 citations · 12 across the 3 of their papers we have counts for
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astro-ph2005
A model for the X-ray absorption in Compton--thin AGN
Alessandra Lamastra, G. Cesare Perola, Giorgio Matt
The fraction of AGN with photoelectric absorption in the X-rays ranging from NH of 10^{22} up to about 10^{24} cm^{-2} (Compton-thin) appears observationally to be anticorrelated t…
astro-ph2005
The HELLAS2XMM survey. VII. The hard X-ray luminosity function of AGN up to z=4: more absorbed AGN at low luminosities and high redshifts
F. La Franca, F. Fiore, A. Comastri +14
We have determined the cosmological evolution of the density of AGN and of their Nh distribution as a function of the un-absorbed 2-10 keV luminosity up to redshift 4. We used the…