Advances in the Simulation System of the ASTRI Project

The ASTRI Mini-Array is an INAF project aimed at constructing an array of nine imaging air Cherenkov telescopes (IACTs) for the very-high energy (VHE) gamma-ray detection at the Teide Observatory site (Tenerife, Canary Islands), finalised to observe astronomical objects emitting photons in the multi-TeV spectral band. Detailed simulations of atmospheric showers of Cherenkov events using Monte-Carlo (MC) methods are needed to estimate the expected performance of the ASTRI Mini-Array and its precursors, such as the ASTRI-Horn prototype located at the Serra La Nave observing station (Mt. Etna, Sicily) and the ASTRI Mini-Array reduced configurations composed by less than nine telescopes. Such simulations are also needed to validate the MC simulation chain, for calibration purposes and for the development of ancillary instruments, and must be performed taking into account a variety of different hardware set-up and observing conditions. The production of events detected by IACTs is carried out with the CoRSiKa software and the sim_telarray package. In this contribution, we present the latest developments of the ASTRI Project simulation system in the framework of the commissioning of the first ASTRI Mini-Array telescope (ASTRI-1), describing in detail the software pipeline adopted for the generation of MC events, the hardware facilities dedicated to run the simulations and the final products delivered for higher-level analyses.