ИСТИНА

Wide field transients’ surveys allow us to discover numerous numbers of transients including transients of unknown nature. The recently reported discovery of fast radio bursts (FRBs) in the framework of the neutron star-neutron star (NS+NS) or neutron star-black hole (NS+BH) binary merger model will be discussed. It is shown that there is no discrepancy between NS merger rate and observed FRB rates in the framework of the Scenario Machine population synthesis - for a kick velocity of 100-150 km s-1 an average NS merger rate is 1/500-1/2000 yr-1 per galaxy up to z = 0.5-1. The other part of presentation will be devoted to the MASTER robotic network. This network is designed for studies of the prompt optical emission of gamma-ray bursts (GRBs; optical emission synchronous with the gamma-ray radiation) and surveys of the sky aimed at discovering uncatalogued objects and photometric studies for various programs. More than 200 alert observations of gamma-ray bursts were made (optical emission were found for 16 objects) and more than 500 optical transients (supernovae, novae, flashes of quasars and BL Lac objects, potentially hazardous asteroids etc.) were discovered by MASTER.