BeppoSAX HELLAS survey. IV (Vignali+, 2001)

Details BeppoSAX HELLAS survey. IV (Vignali+, 2001) BeppoSAX HELLAS survey. IV (Vignali+, 2001)

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ycat..33700900v&link_type=abstract

VizieR On-line Data Catalog: J/A+A/370/900. Originally published in: 2001A&A...370..900V

Other

X-Ray Sources

Scientific paper

We present a comprehensive study of the soft X-ray properties of the BeppoSAX High-Energy Large Area Survey (HELLAS) sources. A large fraction (about 2/3) of the hard X-ray selected sources is detected by ROSAT. The soft X-ray colors for many of these objects, along with the 0.5-2keV flux upper limits for those undetected in the ROSAT band, do imply the presence of absorption. The comparison with the ROSAT Deep Survey sources indicates that a larger fraction of absorbed objects among the HELLAS sources is present, in agreement with their hard X-ray selection and the predictions of the X-ray background synthesis models. Another striking result is the presence of a soft (additional) X-ray component in a significant fraction of absorbed objects.
(1 data file).

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