The GAMMA-400 experiment: Status and prospects

Topchiev, N. P.; Galper, A. M.; Bonvicini, V.; Adriani, O.; Aptekar, R. L.; Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Bergstrom, L.; Berti, E.; Bigongiari, G.; Bobkov, S. G.; Bogomolov, E. A.; Boezio, M.; Bongi, M.; Bonechi, S.; Bottai, S.; Boyarchuk, K. A.; Vacchi, A.; Vannuccini, E.; Vasilyev, G. I.; Castellini, G.; Cattaneo, P. W.; Cumani, P.; Dedenko, G. L.; Dogiel, V. A.; De Donato, C.; Hnatyk, B. I.; Gorbunov, M. S.; Gusakov, Y. V.; Zampa, N.; Zverev, V. G.; Zirakashvili, V. N.; Kadilin, V. V.; Kaplin, V. A.; Kaplun, A. A.; Korepanov, V. E.; Larsson, J.; Leonov, A. A.; Loginov, V. A.; Longo, F.; Maestro, P.; Marrocchesi, P. S.; Mikhailov, V. V.; Mocchiutti, E.; Moiseev, A. A.; Mori, N.; Moskalenko, I. V.; Naumov, P. Y.; Papini, P.; Picozza, P.; Pearce, M.; Popov, A. V.; Ryde, F.; Rappoldi, A.; Ricciarini, S.; Runtso, M. F.; Serdin, O. V.; Sparvoli, R.; Spillantini, P.; Suchkov, S. I.; Tavani, M.; Taraskin, A. A.; Tiberio, A.; Tyurin, E. M.; Ulanov, M. V.; Fuglesang, C.; Kheymits, M. D.; Yurkin, Y. T.

doi:10.3103/S1062873815030429

The development of the GAMMA-400 γ-ray telescope continues. The GAMMA-400 is designed to measure fluxes of γ-rays and the electron-positron cosmic-ray component possibly associated with annihilation or decay of dark matter particles; and to search for and study in detail discrete γ-ray sources, to measure the energy spectra of Galactic and extragalactic diffuse γ-rays, and to study γ-ray bursts and γ-rays from the active Sun. The energy range for measuring γ-rays and electrons (positrons) is from 100 MeV to 3000 GeV. For 100-GeV γ-rays, the γ-ray telescope has an angular resolution of ∼0.01°, an energy resolution of ∼1%, and a proton rejection factor of ∼5 × 105. The GAMMA-400 will be installed onboard the Russian Space Observatory.