Title: Spectral observations of SS 433


Proposal ID: 0120281
Subject category: Compact Object
Principal investigator: Cherepaschuk
Institute: Sternberg Astronomical Institute


Abstract

SS 433 is a galactic superaccreting binary with relativistic jets. Previously performed numerous X-ray observations of this source left main important topics undiscovered. Neither the compact object type and mass nor the jet acceleration mechanizm is known. We propose to obtain the hard X-ray and gamma spectrum of SS 433 with INTEGRAL, with attempt to trace the variation of the spectrum with precession phase and in eclipses. This hard emission might be produced in the lower region of the jet, according to most models of the jets. The expected scientific output of the proposed observation is clarification of jet formation and emission model, and possible putting more strict limits on the compact object nature.