Bonn 2010 – scientific programme
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T: Fachverband Teilchenphysik
T 96: Gammaastronomie V
T 96.4: Talk
Friday, March 19, 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 Wagner1,2, Eckart Lorenz1,3, 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.