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Volume 301 - 35th International Cosmic Ray Conference (ICRC2017) - Session Gamma-Ray Astronomy. GA-galactic
Search for gamma-ray emission above 50 TeV from Crab Nebula with the TAIGA detector
L. Sveshnikova,* I. Astapov, P. Bezyazeekov, V. Boreyko, A. Borodin, M. Brueckner, N. Budnev, A. Chiavassa, A.N. Dyachok, O. Fedorov, A. Gafarov, N. Gorbunov, V. Grebenyuk, O. Gress, T. Gress, O. Grishin, A. Grinyuk, D. Horns, A. Ivanova, N. Kalmykov, Y. Kazarina, V. Kindin, S. Kiryuhin, R. Kokoulin, K. Kompaniets, E. Korosteleva, V.V. Kozhin, E. Kravchenko, M. Kunnas, L. Kuzmichev, Y. Lemeshev, V. Lenok, B. Lubsandorzhiev, N. Lubsandorzhiev, R. Mirgazov, R. Mirzoyan, R. Monkhoev, R. Nachtigall, E. Osipova, A. Pakhorukov, M.I. Panasyuk, L. Pankov, A. Petrukhin, V. Poleschuk, E. Popescu, E. Popova, A. Porelli, E. Postnikov, V. Prosin, V. Ptuskin, E.V. Rjabov, G. Rubtsov, A. Pushnin, Y. Sagan, B. Sabirov, V. Samoliga, Y. Semeney, A. Silaev, A. Silaev(junior), A. Sidorenkov, A.V. Skurihin, V. Slunecka, A.V. Sokolov, C. Spiering, V. Tabolenko, B. Tarashansky, A. Tkachenko, L. Tkachev, M. Tluczykont, R. Wischnewski, A. Zagorodnikov, D. Zhurov, V. Zurbanov, I. Yashin
*corresponding author
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Pre-published on: 2017 August 16
Published on: 2018 August 03
Abstract
The TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma-Astronomy) observatory is designed to study the gamma ray sources and galactic cosmic rays. It is located in the Tunka Valley 50 km from the lake Baikal (Siberia). The first part of TAIGA called the EAS Cherenkov array TAIGA-HiSCORE
currently consists of 28 wide-angle (0.6 sr) stations, distributed over an area of 0.25 km^2. The Crab observation exposure was about 115 hours during the winter seasons of 2016-2017. The expected gamma quanta excess depends on the array energy threshold and a model of the Crab energy spectrum extrapolation to the higher energies. We present preliminary results of experimental data and MC simulations comparison as well as energy threshold and angular resolutions. The experimental data is in a good agreement with the simulations. An excess of events (about 25 events in the region 30-63 TeV) observed from the Crab direction is compatible with the expected one.
DOI: https://doi.org/10.22323/1.301.0677
Open Access
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