Impact of atmospheric effects on the energy reconstruction of air showers observed by the surface detectors of the Pierre Auger Observatory

0483098 - FZÚ 2018 RIV GB eng J - Journal Article
Aab, A. - Abreu, P. - Aglietta, M. - Blažek, Jiří - Boháčová, Martina - Chudoba, Jiří - Ebr, Jan - Mandát, Dušan - Palatka, Miroslav - Pech, Miroslav - Prouza, Michael - Řídký, Jan - Schovánek, Petr - Trávníček, Petr - Vícha, Jakub … Total 410 authors
Impact of atmospheric effects on the energy reconstruction of air showers observed by the surface detectors of the Pierre Auger Observatory.
Journal of Instrumentation. Roč. 12, č. 2 (2017), s. 1-23, č. článku P02006. ISSN 1748-0221. E-ISSN 1748-0221
R&D Projects: GA MŠMT LM2015038; GA MŠMT LG15014; GA ČR(CZ) GA14-17501S
Institutional support: RVO:68378271
Keywords : Cherenkov detectors * data analysis * large detector systems for particle and astroparticle physics * systematic effects
OECD category: Particles and field physics
Impact factor: 1.258, year: 2017

Atmospheric conditions, such as the pressure (P), temperature (T) or air density (rho proportional to P/T), affect the development of extended air showers initiated by energetic cosmic rays. We study the impact of the atmospheric variations on the reconstruction of air showers with data from the arrays of surface detectors of the Pierre Auger Observatory, considering separately the one with detector spacings of 1500m and the one with 750m spacing. We observe modulations in the event rates that are due to the influence of the air density and pressure variations on the measured signals, from which the energy estimators are obtained. We show how the energy assignment can be corrected to account for such atmospheric effects.
Permanent Link: http://hdl.handle.net/11104/0278511