This article is about the physics experiment. For other meanings, see Hegra (disambiguation)

HEGRA, which stands for High-Energy-Gamma-Ray Astronomy, was an atmospheric Cherenkov telescope for Gamma-ray astronomy. With its various types of detectors, HEGRA took data between 1987 and 2002, at which point it was dismantled in order to build its successor, MAGIC, at the same site.

Hegra is a village and former municipality in Nord-Trøndelag county, Norway. The former municipality encompassed most of the eastern part of the present-day municipality of Stjørdal. The ancient rock carvings (Leirfald), as well as the small border fort Hegra Fortress (formerly known as Ingstadkleven Fort) are both located in Hegra. The fortress withstood the invading German army from 10 April to 5 May 1940, not surrendering before all other Norwegian units in Southern Norway and Mid-Norway had capitulated.