ROSAT All-Sky Survey sources on Schmidt plates.

Details ROSAT All-Sky Survey sources on Schmidt plates. ROSAT All-Sky Survey sources on Schmidt plates.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..647b&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 647 - 648

Astronomy and Astrophysics

Astrophysics

1

X-Ray Surveys, X-Ray Sources: Identifications, X-Ray Sources: Active Galactic Nuclei

Scientific paper

The authors present results from an ongoing identification program of ROSAT All-Sky Survey (RASS) sources on objective prism plates. More than 30% of the surveyed sources so far (9949 on ca. 8000 deg2) are AGN candidates with B ≤ 18.5. AGN with typical X-ray to optical flux ratios can principally be recognized down to the RASS flux limit, but large fractions of AGN with higher log(fX/fB) values are missed on the plates due to their optical faintness. The RASS AGN surface density depends strongly on Galactic absorption and therefore Galactic latitude. This reflects the steep X-ray spectra found with ROSAT.

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