ИСТИНА

Study of cosmic gamma ray bursts is one of the main goals of the Lomonosov space mission. Multimessenger GRB observation is the only way of progress achievement in their study. The Lomonosov satellite is the first space mission in which the multi-wavelength observations of GRBs are realized in real time without necessity of optical instrument re-orientation on GRB monitor trigger. The mission payload includes the GRB monitor BDRG, wide - field optical cameras SHOK and UFFO instrument. Data are recorded mainly by the event trigger produced by the BDRG instrument, which measure the spectral and temporal properties of the burst in the energy range 10-3000 keV. The BDRG instrument also provides the source coordinates by comparing the readings of three differently directed detectors with an accuracy of several degrees. Wide-field SHOK optical camera have a field of view of ~20ox40о. They fix by the GRB trigger a set of images with a frequency of about 5 frames per second prior to the trigger and the following. The UFFO instrument incorporates UBAT telescope with coding mask for measurements in hard X-ray and soft gamma-ray and optical telescope with a rotating mirror SMT, that can be directed on the GRB source for a time ~ 1 s for measuring GRB prompt emission in the early stages. The real time data transfer via Globalstar network to the GCN for detected GRB is realized as well as operative control of BDRG data on triggers from ground based facilities including neutrino and gravitation wave detectors. The GRB catalogue is presented in this report, also those events, for which information was obtained in different bands, are discussed in details. During observations on the satellite Lomonosov, 20 gamma-ray bursts were detected and their catalog was compiled. Several gamma-ray bursts were also detected in the Vernov satellite experiment. An example of such event is given