The Very High Energy Sky from ~20 GeV to Hundreds of TeV - Selected Highlights

TL;DR

This paper reviews a decade of observations from major atmospheric Cherenkov telescope arrays, highlighting discoveries of over 100 very high energy sources, mainly active galactic nuclei, across the sky.

Contribution

It provides a comprehensive overview of recent advances in very high energy gamma-ray astronomy using Cherenkov telescopes.

Findings

Over 100 sources detected in the VHE gamma-ray sky.

Major telescopes like MAGIC, VERITAS, and H.E.S.S. have significantly expanded our understanding.

Most sources are active galactic nuclei with relativistic jets.

Abstract

After nearly a decade of operation, the three major arrays of atmospheric Cherenkov telescopes have revolutionized our view of the Very High Energy Universe, unveiling more than 100 sources of various types. MAGIC, consisting of two 17 m diameter telescopes on the Canary island of La Palma, and VERITAS, with four 12 m telescopes installed in southern Arizona, USA, have primarily explored the extragalactic sky, where the majority of the sources are active galactic nuclei (AGN), with {\gamma}-ray emission originating in their relativistic jets. ...... Highlights of these observations with H.E.S.S., MAGIC and VERITAS have been presented and discussed at the conference.