# Monte Carlo Performance Studies for the Site Selection of the Cherenkov Telescope Array

## TL;DR

This paper uses Monte Carlo simulations to evaluate how different site characteristics affect the performance of the Cherenkov Telescope Array, aiding in optimal site selection for gamma-ray astronomy.

## Contribution

It provides a detailed analysis of how site attributes influence CTA performance, supporting the site evaluation process with simulation data.

## Key findings

- Altitude impacts sensitivity and energy threshold.
- Night-sky background affects detection capabilities.
- Geomagnetic field influences telescope performance.

## Abstract

The Cherenkov Telescope Array (CTA) represents the next generation of ground-based instruments for very-high-energy (VHE) gamma-ray astronomy, aimed at improving on the sensitivity of current-generation experiments by an order of magnitude and providing coverage over four decades of energy. The current CTA design consists of two arrays of tens of imaging atmospheric Cherenkov telescopes, comprising Small, Medium and Large-Sized Telescopes, with one array located in each of the Northern and Southern Hemispheres. To study the effect of the site choice on the overall \gls{cta} performance and support the site evaluation process, detailed Monte Carlo simulations have been performed. These results show the impact of different site-related attributes such as altitude, night-sky background and local geomagnetic field on CTA performance for the observation of VHE gamma rays.