The COMET multiperspective event tracker for wide field-of-view gamma-ray astronomy

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:
The ALTO/COMET RandD project focuses on the development of a new technique for the observation of very high-energy (VHE) gamma-rays from the ground at energies above ~200 GeV, thus covering emission from soft-spectrum sources. The ALTO/COMET proposed array under study combines 1241 particle detector units, distributed over a circular area of ~160 m in diameter and placed at a very high altitude (5.1 km), with atmospheric Cherenkov light detectors.rnrnThe atmospheric Cherenkov light detectors, inspired by the "HiSCORE" design and improved for the energy range of interest, can be operated together with the particle detectors during clear nights. As such, the instrument becomes a Cosmic Multiperspective Event Tracker (COMET). ALTO/COMET is expected to improve the reconstruction of arrival direction, energy and shower maximum determination for gamma-ray-induced showers during darkness, which is crucial for the reduction of background contamination from cosmic rays. Prototypes of both particle and atmospheric Cherenkov light detectors are already installed at the Linnaeus University in Sweden, while we simulate the detector response and estimate the reconstruction improvement for gamma-ray events.rnrnIn this contribution, we present Monte-Carlo simulations of the detector array, consisting of CORSIKA shower simulations and custom detector response simulations, together with the coupling of particle and atmospheric Cherenkov light information, the reconstruction strategy of the complete array and the detection performance on point-like VHE gamma-ray sources. In addition, we briefly present the prototype experience.'

Authors: Gašper Kukec Mezek | for the ALTO/COMET Collaboration
Co-Authors: Yvonne Becherini | Martin Tluczykont | Patrizia Romano | Ahmed Saleh | Satyendra Thoudam | Stefano Vercellone | Mohanraj Senniappan | Tomas Bylund | Michael Punch | Jean-Pierre Ernenwein
Collaboration: ALTO/COMET

Indico-ID: 1294
Proceeding URL: https://pos.sissa.it/395/905