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The ROSAT Deep Survey: III. Optical spectral properties of X-ray sources in the Lockman Hole
I. Lehmann, G. Hasinger, M. Schmidt +6
The ROSAT Deep Survey in the Lockman Hole contains a complete sample of 50 X-ray sources with fluxes in the 0.5-2.0 keV band larger than 5.5E-15 erg/cm2/s. Previous work has provid…
Soft X-ray AGN Luminosity Function from ROSAT Surveys I. Cosmological Evolution and Contribution to the Soft X-ray Background
Takamitsu Miyaji, Guenther Hasinger, Maarten Schmidt
We investigate the evolution of the 0.5-2 keV soft X-ray luminosity function (SXLF) of active galactic nuclei (AGN) using results from ROSAT surveys of various depth, ranging from…
The ROSAT All-Sky Survey Bright Source Catalogue
Wolfgang Voges, Bernd Aschenbach, Thomas Boller +16
We present the ROSAT All-Sky Survey Bright Source Catalogue (RASS-BSC, revision 1RXS) derived from the all-sky survey performed during the first half year (1990/91) of the ROSAT mi…
On the Relationship between Galaxy Formation and Quasar Evolution
Alberto Franceschini, Guenther Hasinger, Takamitsu Miyaji +1
We compare the evolution with cosmic time of the star-formation rate per comoving volume in galaxies and of the volume emissivity by Active Galactic Nuclei, as a clue to understand…
The X-Ray Luminosity Function of Active Galactic Nuclei
M. Schmidt, R. Giacconi, G. Hasinger +2
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 distributi…
The ROSAT Deep Surveys
G. Hasinger, I. Lehmann, R. Giacconi +3
The ROSAT Deep Survey in the Lockman Hole is the most sensitive X-ray survey performed to date, encompassing an exposure time of 200 ksec with the PSPC and 1.2 Msec with the HRI. T…