Cherenkov Telescope Array: The next-generation ground-based gamma-ray observatory

TL;DR

The Cherenkov Telescope Array (CTA) is a next-generation gamma-ray observatory designed to significantly surpass current instruments in sensitivity and resolution, enabling new discoveries in high-energy astrophysics.

Contribution

This paper introduces the CTA, a large array of telescopes with improved capabilities, marking a major advancement over existing gamma-ray observatories.

Findings

CTA will detect an order of magnitude more sources.

Enhanced sensitivity and angular resolution will reveal new astrophysical phenomena.

The array will cover multiple energy ranges with different telescope types.

Abstract

High energy gamma-ray astronomy is a newly emerging and very successful branch of astronomy and astrophysics. Exciting results have been obtained by the current generation Cherenkov telescope systems such as H.E.S.S., MAGIC, VERITAS and CANGAROO. The H.E.S.S. survey of the galactic plane has revealed a large number of sources and addresses issues such as the question about the origin of cosmic rays. The detection of very high energy emission from extragalactic sources at large distances has provided insights in the star formation during the history of the universe and in the understanding of active galactic nuclei. The development of the very large Cherenkov telescope array system (CTA) with a sensitivity about an order of magnitude better than current instruments and significantly improved sensitivity is under intense discussion. This observatory will reveal an order of magnitude more sources and due to its higher sensitivity and angular resolution it will be able to detect new classes of objects and phenomena that have not been visible until now. A combination of different telescope types will provide the sensitivity needed in different energy ranges.