Usage of the estimation of the height of the first interaction

Julian Sitarek, Dorota Sobczynska, Katarzyna Adamczyk, Michał Szanecki, Konrad Bernlöhr, CTA Collaboration
2019 Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)   unpublished
The height of the first interaction of an Extensive Air Shower (EAS) is one of the parameters determining the shower development in the atmosphere. We derived a geometrical method of estimation of such a parameter. We study the influence of the first interaction height on the gamma/hadron separation efficiency. Using Monte Carlo simulations of a subarray of 4 Large Size Telescopes (LST) of the Cherenkov Telescope Array we find that one of the methods of the estimation of the height of the first
more » ... height of the first interaction brings a mild improvement (∼10-20%) in the sensitivity at the lowest energies . We test also the method on the MC simulations and data of currently operating MAGIC telescopes.
doi:10.22323/1.358.0794 fatcat:githkafjrbbsvg2cr2w5s2poou