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T: Teilchenphysik

T 302: Kosmische Strahlung IV

T 302.4: Vortrag

Freitag, 4. März 2005, 17:15–17:30, TU H106

H.E.S.S. Observations of AGN — •Wystan Benbow — Max Planck fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg

The High Energy Stereoscopic System (H.E.S.S) is an array of four imaging air-Cherenkov telescopes located in the Khomas Highlands of Namibia (23^∘ 16’ 18” S, 16^∘ 30’ 1” E, 1835 m above sea level). The good angular resolution and background rejection provided by the stereoscopic technique give H.E.S.S. a low energy threshold (∼100 GeV) and allows the detection of a 1% Crab flux source in ∼25 hours of observation. This enables H.E.S.S. to perform searches for VHE gamma-ray emission from astrophysical objects, such as AGN, with unprecedented sensitivity. H.E.S.S. has already detected several sources of VHE gamma rays, including the blazar PKS 2155-304. Results of H.E.S.S. observations of AGN are reported here.