The currently developing space-based gamma-ray telescope GAMMA-400 will measure the and electron + positron fluxes using main top-down aperture in energy range from ? 20 MeV to several TeV a highly elliptic orbit (without shading by Earth outside radiation belts) continuously for long time. instrument provide fundamentally new data on discrete sources, bursts (GRBs), sources propagation of Gala...

Abstract. Interaction of cosmological gamma ray burst radiation with the dense interstellar medium of host galaxy is considered. Gas dynamical motion of interstellar medium driven by gamma ray burst is investigated in 2D approximation for different initial density distributions of host galaxy matter and different total energy of gamma ray burst. The maximum velocity of motion of interstellar me...