The BeppoSAX Deep Surveys

Details The BeppoSAX Deep Surveys The BeppoSAX Deep Surveys

1998-01-23

arxiv.org/abs/astro-ph/9801222v1

Nucl.Phys.Proc.Suppl.69:591-599,1998

Astronomy and Astrophysics

Astrophysics

Invited Talk, to appear in : The Active X-ray Sky: Results from BeppoSAX and Rossi-XTE, Nuclear Physics B Proceedings Suppleme

Scientific paper

10.1016/S0920-5632(98)00301-6

We present the preliminary results of a survey that makes use of several deep exposures obtained with the X-Ray telescopes of the BeppoSAX satellite. The survey limiting sensitivity is 5 x 10^-14 cgs in the 2-10 keV band and 7 x 10^-14 cgs in the harder 5-10 keV band. We find that the 2-10 keV LogN-LogS is consistent with that determined in ASCA surveys. The counts in the 5-10 keV band imply either a very hard average spectral slope or the existence of a population of heavily absorbed sources that can hardly be detected in soft X-ray surveys. A sample of 83 serendipitous sources has been compiled from a systematic search in 50 MECS images. The analysis of the hardness ratio of this sample also implies very hard or heavily cutoff spectral shapes.

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