ИСТИНА

GRB study is one of the main goals of the Lomonosov space mission launched on 28-04-2016 from Vostochny cosmodrome to solar synchronous orbit with 490 km altitude and ~98o inclination. The mission payload includes the BDRG gamma-ray spectrometer designed for spectral measurements and timing in 10-3000 keV energy range as well as for GRB triggering. Two wide-field optical cameras SHOK are placed within fields of view of the gamma-monitor. This allows the simultaneous GRB observations in gammas and optics in all-time scale of event evolution including obtaining optical light curves of prompt emission as well as of precursors. About 20 GRBs were detected by BDRG/Lomonosov during observational period from 05.2016 to 01.2017, as well as several bursts from SGR and a number of solar flares. No triggered GRB sources appeared in the FOV of on-board optical cameras but the joint observations of BDRG/Lomonosov with MASTER net of robotic telescopes allowed one to compare optical and gamma-ray light curve of some of detected GRBs at different phases of their activity. A new space project of M.V. Lomonosov Moscow State University named Universat-SOCRAT will include advanced gamma-ray instrument for GRB triggering, wide-field optical cameras and a fast-pointing optical telescope with moving mirror. The set of instruments for monitoring of space radiation and for studying of atmospheric phenomena in the optical range will also be included. The proposed gamma-ray spectrometer will be based on the considerably simple wide field-of-view coded mask telescope with ~300 pixel PSD allowing to check the presence of a point gamma-ray source on the sky and to obtain its coordinates with accuracy of 1o-2o so one can identify GRBs on the background of various reading increases mostly caused by the electron precipitation. Immediate transfer of the GRB notice to the ground global net will be realized.