ROSAT Public PSPC Observations in the Las Campanas Redshift Survey

Details ROSAT Public PSPC Observations in the Las Campanas Redshift Survey ROSAT Public PSPC Observations in the Las Campanas Redshift Survey

1997-04-22

arxiv.org/abs/astro-ph/9704209v1

Astronomy and Astrophysics

Astrophysics

8 pages, including 4 figures; accepted for publication in Vol. 318, No. 3, of "Astronomische Nachrichten: News in Astronomy an

Scientific paper

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 50,408 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 brightest matches, we interpret the majority of these objects to be narrow-line Seyfert galaxies or ``hidden'' active galactic nuclei. Of the ten matches, only one galaxy shows the characteristics of a bona fide starburst.

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