Gamma- and Cosmic-Ray observations with the GAMMA-400 Gamma-Ray telescope

The future space-based GAMMA-400 gamma-ray telescope will operate onboard the Russian astrophysical observatory in a highly elliptic orbit during 7 years to observe Galactic plane, Galactic Center, Fermi Bubbles, Crab, Vela, Cygnus X, Geminga, Sun, and other regions and measure gamma-and cosmic-ray fluxes. Observations will be performed in the point-source mode continuously for a long time (-100 days). GAMMA-400 will measure gamma rays in the energy range from -20 MeV to several TeV and cosmic-ray electrons + positrons up to several tens TeV. GAMMA-400 instrument will have very good angle and energy resolutions, high separation efficiency of gamma rays from cosmic-ray background, as well as electrons + positrons from protons. The main feature of GAMMA-400 is the unprecedented angular resolution for energies > 30 GeV better than the space-based and ground-based gamma-ray telescopes by a factor of 5-10. GAMMA-400 observations will permit to resolve gamma rays from annihilation or decay of dark matter particles, iden-tify many discrete sources, clarify the structure of extended sources, specify the data on cosmic-ray electron + positron spectra. (c) 2022 COSPAR. Published by Elsevier B.V. All rights reserved.

Automated summary

The future space-based GAMMA-400 gamma-ray telescope will operate onboard the Russian astrophysical observatory in a highly elliptic orbit during 7 years to observe and measure gamma-and cosmic-ray fluxes of various celestial bodies.