The Tunkа astrophysical complex, located in the Tunkа valley, 50 km from Lake Baikal, has been a center for the study of ultrahigh-energy cosmic rays since 1993, by registering extensive air showers (EAS). The wide-angle Cherenkov installation Tunka-133 and its predecessor Tunka-25 made it possible for the first time to “see” the fracture in the energy spectrum of cosmic rays (at 3*10^15 eV) by registering Cherenkov light of EAS. The results obtained by these installations attracted cosmic ray studies there by means of the detection of charged particles and radio emission from EAS by installations Tunka-Grande and Tunka-REX (Tunka Radio Extension), respectively. The current construction of the first stage of the TAIGA gamma observatory (Tunka Advanced Instrument for cosmic ray and Gamma Astronomy), which includes the wide-angle Cherenkov installation TAIGA-HiSCORE (High Sensitivity COsmic Rays and gamma Explorer), the atmospheric Cherenkov telescope of the TAIGA-IACT installation (Imaging Atmospheric Cherenkov Telescope) as well as scintillator installation TAIGA-Muon. The joint work of the detectors is aimed at studying charged cosmic rays, searching for diffuse gamma radiation and studying local sources of gamma rays with energies above 30 TeV. Upon completion of the first stage, the observatory will include 3 TAIGA-IACT telescopes, 120 TAIGA-HiSCORE stations and 12 TAIGA-Muon stations on an area of 1 km^2.
$^1$Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University
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