Spectroscopic Identification of X-Ray Soft AGN / Active Galactic Nuclei Found by ROSAT
Abstract
First results from a program to spectroscopically identify x-ray sources such as soft Active Galactic Nuclei (AGN) found with Rosat in the all sky survey using the X-Ray Telescope (XRT) are presented. For this program, a flux limited sample of sources was extracted from the survey data. A subsample was created which contained only soft sources. Correlations to Simbad and several other catalogs served to remove known sources. In a first observing campaign in Sep. 1991, spectra were obtained for 28 sources, 14 of them showing emission lines at various redshift. The characteristics of these spectra (fluxes, redshifts, and line fluxes) are discussed together with x-ray spectra obtained for the three brightest sources in this sample.
- Publication:
-
X-ray Emission from Active Galactic Nuclei and the Cosmic X-ray Background
- Pub Date:
- March 1992
- Bibcode:
- 1992xrea.conf..383T
- Keywords:
-
- Active Galactic Nuclei;
- Astronomical Catalogs;
- Identifying;
- Rosat Mission;
- X Ray Astronomy;
- X Ray Sources;
- X Ray Spectroscopy;
- X Ray Telescopes;
- Line Spectra;
- Radiant Flux Density;
- Red Shift;
- X Ray Spectra;
- Astronomy