Abstract
The GAMMA-400 gamma-ray telescope is the successor of Soviet and Russian gamma-ray telescopes. GAMMA-400 is being developed for cosmophysical research in accordance with the Russian Federal Space Program 2016–2025. The GAMMA-400 experiment will be implemented aboard the Russian astrophysical space observatory in a highly elliptic orbit during 7 years to provide new data on gamma-ray emission mainly from the Galactic plane, Galactic Center, the Sun and cosmic-ray electron \(+\) positron fluxes. The main mode of observations will be the continuous point-source mode with the duration of up to \({\sim}\)100 days. The GAMMA-400 gamma-ray telescope will study high-energy gamma-ray emission up to several TeV and cosmic-ray electrons \(+\) positrons up to 20 TeV. GAMMA-400 will have the never-achieved angular resolution, the high-energy and time resolutions, as well as very good separation efficiency of gamma rays from cosmic-ray background and of electrons \(+\) positrons from protons. The distinctive features of GAMMA-400 are the excellent angular resolution of \({\sim}0.01^{\circ}\) at \(E_{\gamma}=100\) GeV that exceeds resolutions of the space-based and ground-based gamma-ray telescopes by a factor of 5–10, as well as high-energy resolution of \({\sim}2{\%}\) at \(E_{\gamma}=100\) GeV. GAMMA-400 studies can discover gamma-ray emission from annihilation or decay of dark matter particles, identify many unassociated discrete sources, explore the structure of extended sources, search for gamma-ray bursts and solar gamma-ray flares, improve the data on cosmic-ray electron \(+\) positron spectra for energies of >50 GeV.
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Funding
This study was supported by the Russian State Space Corporation ROSCOSMOS, in part by the Russian Ministry of Science and Higher Education, project ‘‘Fundamental and applied research of cosmic rays,’’ no. FSWU-2023-0068, and in part by the MEPhI Program Priority 2030.
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Topchiev, N.P., Galper, A.M., Arkhangelskaja, I.V. et al. Cosmophysical Research with GAMMA-400. Phys. Atom. Nuclei 86, 489–499 (2023). https://doi.org/10.1134/S1063778823040361
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DOI: https://doi.org/10.1134/S1063778823040361