Abstract
In this paper we propose a ‘knee-like’ approximation of the lateral distribution of the Cherenkov light from extensive air showers in the energy range 30–3000 TeV and study a possibility of its practical application in high energy ground-based gamma-ray astronomy experiments (in particular, in TAIGA-HiSCORE). The approximation has a very good accuracy for individual showers and can be easily simplified for practical application in the HiSCORE wide angle timing array in the condition of a limited number of triggered stations.
Highlights
Ground-based gamma-ray astronomy has developed very fast since the discovery of the first TeV gamma-ray source, the Crab Nebula, in 1989 [1] by the Whipple collaboration
The competing method of Cherenkov light registration for gamma-ray astronomy is a wide angle timing array, which was first realized in THEMISTOCLE [3] and AIROBICC [4]
We proposed and studied a ‘knee-like’ 5-parameter approximation of lateral distributions of Cherenkov light emitted by extensive air showers
Summary
Ground-based gamma-ray astronomy has developed very fast since the discovery of the first TeV gamma-ray source, the Crab Nebula, in 1989 [1] by the Whipple collaboration This experiment was based on the imaging air Cherenkov technique, IACT [2]. At the present time the gamma-ray timing array concept HiSCORE [5, 6] (High Sensitivity Cosmic Origin Explorer) is realized in the Tunka valley in Siberia as part of the TAIGA observatory [7]. This is an array of wide-angle non-imaging Cherenkov light detectors spaced about hundred meters apart from each other. The analysis of Qi (R, t) gives the possibility to reconstruct all the parameters of the primary particle needed for gamma-ray astronomy: shower arrival direction, core position, energy and type of particles [8, 9]
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