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The name also emphasizes two main features of the installation, namely the simultaneous observation of air showers with several telescopes, under different viewing angles, and the combination of telescopes to a large system to increase the effective detection area for gamma rays. H.E.S.S. permits the
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In 2016, the HESS collaboration reported deep gamma ray observations which show the presence of petaelectronvolt-protons originating from the supermassive black hole at the centre of the Milky Way, and therefore should be considered as a viable alternative to supernova remnants as a source of
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H.E.S.S. consists of five telescopes: four with mirrors just under 12 m in diameter, arranged as a square with 120 m sides, and one larger telescope with a 28 m mirror, located at the centre of the array. The four 12 m telescopes
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near the
Gamsberg mountain, an area well known for its excellent optical quality. The first of the four telescopes of Phase I of the H.E.S.S. project went into operation in Summer 2002; all four were operational in December 2003.
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In 2005, it was announced that H.E.S.S. had detected eight new high-energy gamma ray sources, doubling the known number of such sources. As of 2014, more than 90 sources of teraelectronvolt gamma rays were discovered by H.E.S.S.
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As with other gamma-ray telescopes, H.E.S.S. observes high energy processes in the universe. Gamma-ray producing sources include
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exploration of gamma-ray sources with intensities at a level of a few thousandth parts of the flux of the
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HESS collaboration (2016). "Acceleration of petaelectronvolt protons in the
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in 2004, with the 28 m telescope added as an upgrade (called H.E.S.S. II) in 2012.
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In 2004 H.E.S.S. was the first IACT experiment to spatially resolve a source of cosmic
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A 1/30 scale model of a H.E.S.S. telescope on display in the
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30:"HESS" redirects here. For the gas and oil company, see
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567:: Number of very high-energy gamma ray sources doubles
417:"Largest ever Cherenkov telescope sees first light"
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242:imaging atmospheric Cherenkov telescopes
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601:Astronomical observatories in Namibia
365:Four telescopes in operation at night
27:Gamma Ray Telescope System in Namibia
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437:Horan, Deirdre; Wakely, S. (2008).
252:range of 0.03 to 100 TeV. The
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53:The five-telescope H.E.S.S. array
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42:High Energy Stereoscopic System
572:Aspera European network portal
377:Aerial view of H.E.S.S. (2017)
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128:1,800 m (5,900 ft)
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606:Particle experiments
596:Gamma-ray telescopes
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501:2016Natur.531..476H
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95:16°30′00″E
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