TAIGA-Observatory: First 5 years of operation of the HiSCORE Air-Cerenkov Array

Discussion timeslot (ZOOM-Meeting): 16. July 2021 - 18:00
ZOOM-Meeting URL: https://icrc2021.desy.de/pf_access_abstracts
Corresponding Session: https://icrc2021-venue.desy.de/channel/Presenter-Forum-1-Evening-All-Categories/48
Abstract:
'TAIGA-HiSCORE is a wide-aperture Air-Cherenkov array, and is a major component of the TAIGA-Observatory (Tunka Instrument for high-energy gamma-ray astronomy and cosmic ray physics), located in the Tunka valley, 50km from Lake Baikal, Russia. A main science target of TAIGA is gamma ray astronomy above ten’s of TeV, in particular the search for sources of few 100 TeV gamma rays (candidate “PeVatrons”), the possible sites of Galactic cosmic ray acceleration. The HiSCORE array will consist of 120 optical Cerenkov stations, deployed on an area of 1km2. Its construction will be finished in 2021.rnrnThis report presents the performance of HiSCORE during thexa0 first 5 years of operation, inxa0 various configurations, from 28 to 88 stations. A key for high sensitivity to gamma point sources is precision timing of the whole array down to sub-nsec level, required to be stable for the observation period. We apply different methods to reach this goal. The pointing resolution of the array for extended air-showers is obtained as 0.1° for highest energies, and is experimentally verified, based on independent approaches. We present results of a 5-year-search for gamma-like point sources with HiSCORE, and compare to MC-predictions.'

Authors: Andrea Porelli | Ralf Wischnewski | For the TAIGA Collaboration
Collaboration: TAIGA

Indico-ID: 1319
Proceeding URL: https://pos.sissa.it/395/877