Monitoring of high energy X-ray sources with the BeppoSAX GRBM

The Gamma-Ray Burst Monitor (GRBM) aboard the BeppoSAX satellite has already shown good capabilities in the detection of Gamma-Ray Bursts (GRB). We have also tested its performance as monitor of the hard X-ray flux from strong celestial sources, using the Earth Occultation Technique. A verification of the on-ground calibrations of the instrument was performed deriving the flux of the Crab Nebula. In this paper we report results on Crab and light curves of other sources detected.