Abstract
We present the current status of high-energy cosmic-ray physics and gamma-ray astronomy at the Tunka Astrophysical Center (AC). This complex is located in the Tunka Valley, about 50 km from Lake Baikal. Present efforts are focused on the construction of the first stage of the gamma-ray observatory TAIGA - the TAIGA prototype. TAIGA (Tunka Advanced Instrument for cosmic ray physics and Gamma Astronomy) is designed for the study of gamma rays and charged cosmic rays in the energy range 1013 eV–1018 eV. The array includes a network of wide angle timing Cherenkov stations (TAIGA-HiSCORE), each with a FOV = 0.6 sr, plus up to 16 IACTs (FOV - 10∘ × 10∘ ). This part covers an area of 5 km2 . Additional muon detectors (TAIGA-Muon), with a total coverage of 2000 m2 , are distributed over an area of 1 km2 .
Highlights
The progress in understanding the nature of sources of high-energy cosmic rays from our Galaxy and from the Metagalaxy is going along in three directions:c The Authors, published by EDP Sciences
This array permits a detailed study of the energy spectrum and mass composition in the energy range from 5 · 1015 to 1018 eV
The dynamic range of the amplitude measurement is about 3 · 104. This is achieved by means of two channels for each detector extracting the signals from the anode and an intermediate dynode of the PMT with different additional amplification factors
Summary
We will continue the study of CRs with the Cherenkov air-shower array Tunka133 ([11]) This array permits a detailed study of the energy spectrum and mass composition in the energy range from 5 · 1015 to 1018 eV. We have addressed gamma-ray astronomy (i.e. the hitherto most successful way to find individual sources of CRs) and started to deploy a gamma-ray observatory at the Tunka site. Three arrays to study charged CRs operate at the Tunka site: Tunka-133, Tunka-REX and Tunka-Grande (Fig. 1).
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