Identification of soft high galactic latitude RASS X-ray sources. II. Sources with PSPC count rate CR <0.5 cts/s
Abstract
We present a summary of spectroscopic identifications of bright soft high galactic latitude X-ray sources from the ROSAT All-Sky Survey with total PSPC count rates 0.11 < CR < 0.5 {cts s(-1) }\ and hardness ratios HR1 < 0. This study supplements the identification program of a complete sample of sources with CR >= 0.5 {cts s(-1) }\ presented previously. Spectroscopic identifications are presented for 70 of 77 sources, 5 sources are identified by other means, and subsidiary information is given for 2 as yet unidentified sources. In practically all cases, a unique optical counterpart exists. As for the brighter fraction of the sample, the largest source classes are Seyfert 1 galaxies, magnetic cataclysmic variables, and hot white dwarfs. In the Galactic Pole caps at | b | ga 40(deg) , Seyfert galaxies dominate, whereas at intermediate latitudes galactic objects as magnetic cataclysmic variables and white dwarfs become relatively more frequent. Based in part on observations with the ESO/MPI 2.2m telescope at La Silla, Chile
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1999
- Bibcode:
- 1999A&A...347...47B
- Keywords:
-
- STARS: NOVAE;
- CATACLYSMIC VARIABLES;
- GALAXIES: ACTIVE;
- GALAXIES: NUCLEI;
- GALAXIES: QUASARS: GENERAL;
- GALAXIES: SEYFERT;
- X-RAYS: GENERAL