Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aipc..431..479t&link_type=abstract
Accretion processes in astrophysical systems: Some like it hot! - eigth astrophysics conference. AIP Conference Proceedings, Vo
Astronomy and Astrophysics
Astrophysics
X-Ray Sources, X-Ray Bursts, Infall, Accretion, And Accretion Disks, Accretion And Accretion Disks, Binary And Multiple Stars
Scientific paper
We have carried out a survey of the entire Einstein IPC database to select objects with strong components of ultra-soft X-ray emission (i.e., emission below 0.5 keV). The selection criteria are based on ratios of counts within three broad energy bands. A total of 516 objects have been selected with 202 (39%) having been identified to date through correlations with other databases. The survey has been remarkably successful in selecting objects with strong soft X-ray emission. Among the classes of objects selected are such accreting systems as Active Galactic Nuclei, Cataclysmic Variable (primarily AM Her) systems, and X-ray binaries, along with white dwarfs and isolated neutron stars. We are confident that many more such interesting systems are waiting to be discovered among the as-yet unidentified objects in our catalog. We discuss our selection criteria, present statistics on the types of objects selected, and discuss the potential for follow-up observations of the unidentified subsample of objects.
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