Abstract:The Las Campanas Redshift Survey, an optically selected survey which contains 26 418 galaxy redshifts, has been correlated with "The First ROSAT Source Catalogue of Pointed Observations with the PSPC," which contains 50408 sources from 2876 ROSAT pointed observations. Ten matches were found. The optical spectra of most of the ten matches show weak narrow emission lines. Due to their high x-ray luminosities, their high x-ray-to-optical flux ratios, and the evidence of rapid x-ray variability in the two brightes… Show more
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