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The Nature of Accreting Black Holes in Nearby Galaxy Nuclei
We have found compact X-ray sources in the center of 21 (54%) of 39 nearby face-on spiral and elliptical galaxies with available ROSAT HRI data. ROSAT X-ray luminosities (0.2 - 2.4 keV) of these compact X-ray sources are ~ 1e37 - 1e40 erg/s (with a mean of 3e39 erg/s. The …