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T: Fachverband Teilchenphysik

T 96: Gammaastronomie V

T 96.4: Vortrag

Freitag, 19. März 2010, 14:50–15:05, HG VII

A conceptual design of an advanced 23-m diameter Imaging Air Cherenkov Telescope of 50 tons for ground-based gamma-ray astronomy — •Robert Wagner^1,2, Eckart Lorenz^1,3, Masahiro Teshima¹, Thomas Schweizer¹, Thomas Haubold¹, Holger Wetteskind¹, Christopher Jablonski¹, Daniel Ferenc⁴, and Maria Victoria Fonseca⁵ — ¹Max-Planck-Institut für Physik, 80805 München — ²Excellence-Cluster Origin and Structure of the Universe, 85748 Garching b. München — ³ETH Zürich, CH-8093 Zürich, Schweiz — ⁴University of California, Davis, USA — ⁵Universidad Complutense, Madrid, Spanien

The MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) Telescope has opened the field of ground-base sub-100 GeV gamma-ray astronomy. Observations with higher sensitivity in this energy region will have important consequences for the understanding of both galactic and extragalactic sources of non-thermal gamma radiation. We present a conceptual design of an advanced Imaging Air Cherenkov Telescope with a 23 m diameter reflector and a weight of 50 tons. A system photon detection efficiency of 15-17%, averaged over 300-600 nm, is aimed at to lower the energy threshold to 10-20 GeV. Prospects for a second generation camera with Geiger-mode avalanche photodiodes will also be discussed. The 23-m design can serve as large-size telescope for the future Cherenkov Telescope Array project.