Abstract
Characteristics of supercritical precessing accretion disk in SS433 X-ray eclips- ing binary system, microquasar, that are based on optical and X-ray observations are presented. New hard X-ray observations of SS433 made from the border of the INTEGRAL observatory have shown that SS433 exhibits both precessional and eclipsing variability in the range 25-50 and 50-100 KeV. Amplitude of the hard X-ray precessing variability is about 80%. The depth of hard X-ray eclipse at the phase of maximum opening of the accretion disk is 80% which is more than that in the standard 2-10 KeV X-ray range (50%). Full width of eclipse in hard X-ray range at half intensity is 2.0-2.2 days which is close to that in 2-10 KeV range. Binary parameters of SS433 are estimated and some constrains are imposed on the structure of supercritical accretion disk.
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