Very high energy (VHE) γ-rays constitute one of the main pillars of high energy astrophysics.
Gamma-rays are produced under extreme relativistic conditions in the Universe. VHE γ-rays …

Recent advances in ground-based gamma ray astronomy have led to the discovery of more
than 70 sources of very high energy (E γ⩾ 100 GeV) gamma rays, falling into a number of …

Depuis la découverte des rayons cosmiques en 1912 par Victor Hess, il aura fallu près de
70 ans et de nombreux développements pour aboutir à la première détection d'une source …

Very-high energy (VHE) gamma quanta contribute only a minuscule fraction–below one per
million–to the flux of cosmic rays. Nevertheless, being neutral particles they are currently the …

In the 1970s, the Narrabri intensity interferometer was used to measure 32 stellar diameters;
some as small as 0.4 mas. The interferometer consisted of a pair of 6.5 m telescopes (30 m …

Le présent numéro est le premier de deux volumes consacrés à l'astronomie gamma de
haute énergie au-dessus de 100 MeV, qui a considérablement progressé au cours des vingt …

No reliable in-situ optical characterization tool is available that can efficiently and accurately
measure various optical errors of individual heliostats in a utility-scale power-tower plant …

The stereoscopic imaging atmospheric Cherenkov technique, developed in the 1980s and
1990s, is now used by a number of existing and planned gamma-ray observatories around …

A newly developed in situ non-intrusive optical (NIO) approach has been developed to
survey various types of heliostat optical errors for a concentrating solar power (CSP) tower …

This paper provides a brief, personal account of the development of ground-based gamma-
ray astronomy, primarily over the last 35 years, with some digressions into the earlier history …