Abstract The ASTRI Mini-Array is an international project led by the Italian National Institute for Astrophysics (INAF) to deploy an array of nine Imaging Atmospheric Cherenkov Telescopes at the Teide Observatory in Tenerife. The system will study astronomical sources emitting in the very high-energy band above 1 TeV up to 200 TeV. The telescope array is an improved version of the ASTRI-Horn telescope (Mt. Etna, Italy), a 4 m diameter small-sized telescope (SST) prototype, developed by INAF in the initial phase of the ASTRI Project in the CTA context. The Cherenkov camera for the Mini-Array, based on Silicon Photo-Multiplier (SiPM) detectors, is an evolution of the ASTRI-Horn telescope camera. Its electronics is based on a peak detection circuit and is designed to perform self-trigger of the whole focal plane. This allows to detect the Cherenkov signal while reducing the amount of raw data. Its electronics, based on a peak detection circuit, is designed to perform self-trigger of the whole focal plane in order to detect Cherenkov signal while ensuring a small amount of data transfer. In this contribution we present the camera calibration strategy and tools developed thanks to the lessons learned with the ASTRI-Horn telescope. These calibration procedures are essential to extract the SiPMs calibration coefficients, which are needed for the Cherenkov data analysis, as well as camera configuration parameters, that ensure system stability and a uniform trigger efficiency over the whole focal plane. Moreover, thanks to the internal calibration system, these procedures allow to monitor the system performance and camera health during the regular data taking period.
Mollica et al. (Tue,) studied this question.
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