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The name also emphasizes two main features of the currently-operating 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 exploration of gamma-ray sources with intensities at a level of a few thousandth parts of the flux of the [[Crab Nebula]]. |
The name also emphasizes two main features of the currently-operating 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 exploration of gamma-ray sources with intensities at a level of a few thousandth parts of the flux of the [[Crab Nebula]]. |
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H.E.S.S. has four telescopes, each with a mirror just under 12m in diameter, arranged 120m apart from each other in a square. A larger telescope with a 30m mirror called H.E.S.S. Phase 2 is currently under construction and expected to see [[First light (astronomy)|first light]] in September 2012. |
H.E.S.S. has four telescopes, each with a mirror just under 12m in diameter, arranged 120m apart from each other in a square. A larger telescope with a 30m mirror called H.E.S.S. Phase 2 is currently under construction in the centre of the array and expected to see [[First light (astronomy)|first light]] in September 2012. |
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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 [[Supernova remnant|Supernova Remnants]], [[Active galactic nucleus|Active Galactic Nucleii]] and [[Pulsar wind nebula|Pulsar Wind Nebulae]]. It also actively tests unproven theories in physics such as looking for the predicted gamma-ray annihilation signal from [[Weakly interacting massive particles|WIMP dark matter particles]] and testing [[Lorentz invariance]] predictions of [[Loop Quantum Gravity]]. |
As with other gamma-ray telescopes, H.E.S.S. observes high energy processes in the universe. Gamma-ray producing sources include [[Supernova remnant|Supernova Remnants]], [[Active galactic nucleus|Active Galactic Nucleii]] and [[Pulsar wind nebula|Pulsar Wind Nebulae]]. It also actively tests unproven theories in physics such as looking for the predicted gamma-ray annihilation signal from [[Weakly interacting massive particles|WIMP dark matter particles]] and testing [[Lorentz invariance]] predictions of [[Loop Quantum Gravity]]. |
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High Energy Stereoscopic System or H.E.S.S. is a next-generation system of Imaging Atmospheric Cherenkov Telescopes (IACT) for the investigation of cosmic gamma rays in the 100 GeV and TeV energy range. The acronym was chosen in honour of Victor Hess, who was the first to observe cosmic rays.
The name also emphasizes two main features of the currently-operating 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 exploration of gamma-ray sources with intensities at a level of a few thousandth parts of the flux of the Crab Nebula.
H.E.S.S. has four telescopes, each with a mirror just under 12m in diameter, arranged 120m apart from each other in a square. A larger telescope with a 30m mirror called H.E.S.S. Phase 2 is currently under construction in the centre of the array and expected to see first light in September 2012.
As with other gamma-ray telescopes, H.E.S.S. observes high energy processes in the universe. Gamma-ray producing sources include Supernova Remnants, Active Galactic Nucleii and Pulsar Wind Nebulae. It also actively tests unproven theories in physics such as looking for the predicted gamma-ray annihilation signal from WIMP dark matter particles and testing Lorentz invariance predictions of Loop Quantum Gravity.
H.E.S.S. is located on the Cranz family farm, Göllschau, in Namibia, near the Gamsberg, 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.
In 2004 H.E.S.S. was the first IACT experiment to spatially resolve a source of cosmic gamma rays.
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 September 2011, there are 62 sources in the HESS catalogue.
23°16.28′S 16°30′E / 23.27133°S 16.500°E / -23.27133; 16.500
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