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Free keywords:
Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE
MPINP:
HESS - Abteilung Hofmann
Abstract:
H.E.S.S. is an array of five Imaging Atmospheric Cherenkov Telescopes (IACTs)
located 1800 m above sea level in the Khomas Highland of Namibia and is
sensitive to very-high-energy (VHE) gamma rays between tens of GeV to tens of
TeV. The very-high background rejection capabilities of IACTs provide excellent
sensitivity of H.E.S.S. to GRBs. In this contribution the status of the
H.E.S.S. GRB programme, already started in 2003, is reviewed. A highlight is
the recent addition of the fifth telescope, which is the world's largest IACT.
Its 600 square metre mirror lowers the energy threshold to tens of GeV and
provides an effective area that is ten thousands of times larger than Fermi-LAT
at these energies. The higher performance drive system will reduce the response
time to a GRB alert, which will significantly enhance the chances of a H.E.S.S.
GRB detection. Recent results on selected GRBs will be shown.
