BATSE observations of BL Lac Objects

Abstract

The Burst and Transient Source Experiment (BATSE) on the Compton Gamma-Ray Observatory has been shown to be sensitive to non-transient hard X-ray sources in our galaxy, down to flux levels of 100 mCrab for daily measurements, 3 mCrab for integrations over several years. We use the continuous BATSE database and the Earth Occultation technique to extract average flux values between 20 and 200 keV from complete radio- and X-ray- selected BL Lac samples over a 2 year period.

4 Pages, to appear in the proceedings of the conference "BL Lac Phenomenon", Turku, Finland, 22-26 June 1998, ed. L. Takalo