Atmospheric monitoring and inter-calibration of the telescope optical throughput efficiencies using the trigger rates of the Cherenkov Telescope Array

0521230 - FZÚ 2020 RIV NL eng J - Článek v odborném periodiku
Štefánik, S. - Nosek, D. - de los Reyes, R. - Gaug, M. - Trávníček, Petr
Atmospheric monitoring and inter-calibration of the telescope optical throughput efficiencies using the trigger rates of the Cherenkov Telescope Array.
Astroparticle Physics. Roč. 109, May (2019), s. 12-24. ISSN 0927-6505. E-ISSN 1873-2852
Grant CEP: GA MŠMT LTT17006; GA MŠMT LM2015046
Institucionální podpora: RVO:68378271
Klíčová slova: air showers * atmospheric monitoring * calibration * Cherenkov telescopes * gamma-ray astronomy
Obor OECD: Particles and field physics
Impakt faktor: 2.610, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.astropartphys.2019.02.002

We discuss a calibration method for imaging atmospheric Cherenkov telescope arrays, based on the detection of cosmic rays. The focus lies on the monitoring of transmission of Cherenkov light in the atmosphere and on the relative calibration of telescope optical throughput efficiencies. We present an approach that addresses both issues by surveying and comparing trigger rates of telescopes in a stereoscopic configuration. A Monte Carlo feasibility study was conducted to explore dependencies of stereo trigger rates on the array layout and observing conditions of the Cherenkov Telescope Array (CTA). Analytical expressions for most of these dependencies have been found and implemented in an extension of the method of the Cherenkov Transparency Coefficient (CTC). In the investigated examples, the resolution of the method for the atmospheric and array calibration has been shown to be 4% and 4–7%, respectively.

Trvalý link: http://hdl.handle.net/11104/0305866