Abstract
view Abstract Citations (204) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The medium sensivity survey : a new sample of X-ray sources with optical identifications and the revised extragalactic log N-log S. Gioia, I. M. ; Maccacaro, T. ; Schild, R. E. ; Stocke, J. T. ; Liebert, J. W. ; Danziger, I. J. ; Kunth, D. ; Lub, J. Abstract The Einstein Observatory Medium Sensitivity Survey has been extended. 49 new, high galactic latitude X-ray sources have been detected in ≡150 IPC fields (≡40 deg2) with sensitivities in the range 7×10-14 to 2×10-12ergs cm-2s-1. The optical program undertaken to identify these new sources has yielded a virtual 100% identification rate. These sources have been combined with those previously selected resulting in a sample of 112 serendipitous X-ray sources. Of these, 75% are associated with extragalactic objects, and 25% are identified with galactic stars. Active galactic nuclei (AGNs-quasars and Seyfert galaxies) constitute the large majority of the extragalactic population (68%). The log N-log S relations for the two classes of objects for which enough statistics are present, AGNs and clusters of galaxies, have been computed. Publication: The Astrophysical Journal Pub Date: August 1984 DOI: 10.1086/162332 Bibcode: 1984ApJ...283..495G Keywords: Galactic Nuclei; Heao 2; Quasars; Seyfert Galaxies; X Ray Sources; Astronomical Photometry; Bl Lacertae Objects; Cosmology; Red Shift; Space Density; X Ray Spectra; Astrophysics full text sources ADS | data products SIMBAD (49) NED (10)
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