Gamma Air Watch (gaw) - AN Imaging Atmospheric Cherenkov Telescope Large with Large Field of View

Details Gamma Air Watch (gaw) - AN Imaging Atmospheric Cherenkov Telescope Large with Large Field of View Gamma Air Watch (gaw) - AN Imaging Atmospheric Cherenkov Telescope Large with Large Field of View

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006hegr.conf...75m&link_type=abstract

HIGH ENERGY GAMMA-RAY EXPERIMENTS. Proceedings of the Third Workshop on Science with the New Generation of. Held 30 May-1 June 2

Physics

Optics

Scientific paper

GAW, an acronym for Gamma Air Watch, is an experiment to test the feasibility of a new generation of imaging atmospheric Cherenkov telescopes with large field of view capability. GAW is an array of three identical telescopes disposed at the vertexes of an equilateral triangle, ~100 m side. Two main features characterize GAW with respect to all the existing and presently planned ground-based Cherenkov telescopes. The first difference concerns the optics system: GAW uses a Fresnel refractive lens (Ø2.13 m) as light collector instead of classical reflective mirror. The second main difference is that the detector at the focal surface operates in single photoelectron counting mode instead of the usual charge integration one. The GAW array is planned to be located at the Calar Alto Observatory site,s Spain, 2150 m a.s.l. During its first phase, only 6° × 6° of the focal plane detector will be implemented; in a second phase, the focal plane will be enlarged to cover a field of view of ± 24°. GAW is a collaboration effort of Research Institutes in Italy, Portugal and Spain.

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