Einstein X-ray observations of optical-radio selected areas

Details Einstein X-ray observations of optical-radio selected areas Einstein X-ray observations of optical-radio selected areas

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...275....1k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 275, Dec. 1, 1983, p. 1-7.

Astronomy and Astrophysics

Astrophysics

13

Extragalactic Radio Sources, Galactic Clusters, Galactic Nuclei, X Ray Sources, Active Galactic Nuclei, Galactic Radiation, Heao 2

Scientific paper

The authors present X-ray observations with the IPC aboard the Einstein Observatory of fields SA 57, SA 68, and UMi which possess deep optical and radio coverage. The X-ray sensitivity in the survey is ≡2×10-13ergs cm-2s-1. The number of X-ray sources detected is consistent with a log N(>S) - log S slope of ≡ -1.5. The fraction of extragalactic X-ray sources detected in radio is ≡60%. The fraction of active galactic nuclei in the X-ray sample is ⪉50% with the remaining fraction being composed of clusters and normal galaxies. These results are consistent with those obtained in the Einstein medium sensitivity survey.

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