paper

The development of ground-based Gamma-ray astronomy: a historical overview of the pioneering experiments

arXiv:2406.15037 · doi:10.1007/978-981-19-6960-7

Abstract

The ground-based technique for imaging atmospheric Cherenkov telescopes became a rapidly developing and powerful branch of science. Thanks to this technique, over 250 very high-energy gamma-ray sources of galactic and extragalactic origin have been discovered. Many fundamental questions of astrophysics, astro-particle physics, the physics of cosmic rays and cosmology are the focus of this technique. In the past 33 years since the discovery of the first gamma-ray source, the Crab Nebula, the discipline has made remarkable progress. Today, the technology boasts highly sensitive telescopes capable of detecting a point source 100 times fainter than the standard candle, the Crab Nebula, in 25 hours of observation. Further developments in this technology led to the Cherenkov Telescope Array (CTA), the next-generation large instrument. The sensitivity of CTA will be several times higher than that of the current best instruments. This article presents a brief history of ground-based very high energy gamma-ray astrophysics.

28 pages, 5 figures, Invited chapter for the section "Ground-based Gamma-ray Observatories" (Section Editors: Daniel Mazin, Miguel Mostafa, Gerd Pühlhofer) for the Handbook of X-ray and Gamma-ray Astrophysics (Editors: Cosimo Bambi, Andrea Santangelo; Publisher: Springer Nature Singapore 2024)

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