orbit inclination $51^o$, orbital period $\sim 90$ min) from October, 1995 to June, 1997 [@Kud98]. The scintillation spectrometer PX-2 for the energy range $\Delta E_{\gamma} = 10-300$ keV of detected photons with the effective area $S \sim 300 cm^2$, and field of view $\Omega \sim 1$ sr was the main instrument for astrophysical observations. It consists of 7 identical detector units of the “Prognoz-9” instrument type with crossed FOVs. The axes of these detector units were shifted on $5^o$ respectively to each other. This allowed us to observe almost the same area of the sky with all detectors simultaneously, and on the other hand, in the case of temporal phenomena registration to determine the source direction by the output data from each detector. The instrument provides flux measurements in energy ranges: 10-50, 25-50, 50- 100, 100-200 and 200-300 keV. Information was transmitted to the Earth in 16h-long sessions of continuous observations; the interval between them typically ranged from several hours to several days. A total $\sim 200$ sessions were conducted during the experiment, from which $\sim 150$ without many telemetry failures and incorrect times of output data recordings were chosen for subsequent analysis. Due to the rigid fastening of the 