Results 61 to 70 of about 1,482 (185)

The X-Ray Luminosity Function of Active Galactic Nuclei

open access: yes, 1999
We derive an X-ray luminosity function for active galactic nuclei (AGN) that accounts for the X-ray source counts in the 0.5-2.0 and 2-10 keV energy ranges, the redshift distribution of AGNs in the ROSAT Deep Survey (RDS), as well as the X-ray background (XRB) from 1-10 keV.
Schmidt, M.   +4 more
openaire   +2 more sources

Obscured active galactic nuclei from the ELAIS Deep X-ray Survey [PDF]

open access: bronze, 2003
Chris J. Willott   +15 more
openalex   +1 more source

Hard X-ray variability of three active galactic nuclei

open access: bronze, 1984
P. Ubertini   +4 more
openalex   +1 more source

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