منابع مشابه
TeV γ-ray Astronomy in the new Millennium
The field of TeV gamma-ray astronomy is reviewed with emphasis on its relation to the origin of cosmic rays. The discovery of TeV photons from supernova remnants and active galaxies has provided the first direct observational link between specific astrophysical objects and particle production at the TeV scale. TeV γ-ray observations constrain the high end of the electromagnetic spectrum, a regi...
متن کاملModelling in Very - High - Energy γ - ray Astronomy
Context. Ground based Cherenkov telescope systems measure astrophysical γ-ray emission against a background of cosmic-ray induced air showers. The subtraction of this background is a major challenge for the extraction of spectra and morphology of γ-ray sources. Aims. The unprecedented sensitivity of the new generation of ground based very-high-energy γ-ray experiments such as H.E.S.S. has lead ...
متن کاملγ-Ray Astronomy with MAGIC above 25 GeV
The MAGIC telescopes are 17 m diameter Cherenkov telescopes, located on the Canarian island La Palma (Spain), with an optimal view on the Northern sky. It is nowadays the only ground-based instrument able to measure high-energy γ-rays below 100 GeV. A recent upgrade of the trigger system allows to extend the sensitivity down to 25 GeV, which resulted in the detection of pulsed emission from the...
متن کاملRitchey - Chrétien telescope for ground - based γ - ray astronomy
The field of very high energy (VHE) ground-based γray astronomy, pioneered by the Whipple 10m atmospheric Cherenkov telescope (ACT) [ 1], is being revolutionized by the new generation observatories: H.E.S.S. [ 2], MAGIC [ 3], and VERITAS [ 4]. Dozens of new γray sources, some representing new classes of VHE emitters, have been discovered during the last decade [ 5]. If the trend of scientific d...
متن کاملHigh-Energy γ-ray Astronomy and String Theory
There have been observations, first from the MAGIC Telescope (July 2005) and quite recently (September 2008) from the FERMI Satellite Telescope, on non-simultaneous arrival of high-energy photons from distant celestial sources. In each case, the highest energy photons were delayed, as compared to their lower-energy counterparts, by clearly observable time intervals. Although the astrophysics at...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nature
سال: 1977
ISSN: 0028-0836,1476-4687
DOI: 10.1038/267380b0