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GAW Telescope

Title: GAW - An Imaging Atmospheric Cherenkov Telescope with Large Field of View
Authors: G. Cusumano (IASF-Palermo), G. Agnetta (IASF-Palermo), A. Alberdi (IAA-Granada), M. Alvarez (DFAMN-US-Sevilla), P. Assis (LIP-Lisbon), B. Biondo (IASF-Palermo), F. Bocchino (OA-Palermo), P. Brogueira (LIP-Lisbon), J.A. Caballero (DFAMN-US-Sevilla), M. Carvajal (Univ. Huelva), A.J. Castro-Tirado (IAA-Granada), O. Catalano (IASF-Palermo), F. Celi (IASF-Palermo), C. Delgado (IAC-Tenerife), G. Di Cocco (IASF-Bologna), A. Dominguez (DFAMN-US-Sevilla), J.M. Espino Navas (DFAMN-US-Sevilla), M.C. Espirito Santo (LIP-Lisbon), M.I. Gallardo (DFAMN-US-Sevilla), J.E. Garcia (Univ. Huelva), S. Giarrusso (IASF-Palermo), M. Gomez (Univ. Huelva), J.L. Gomez (IAA-Granada), P. Goncalves (LIP-Lisbon), M. Guerriero (IAA-Granada), A. La Barbera (IASF-Palermo), G. La Rosa (IASF-Palermo), M. Lozano (DFAMN-US-Sevilla), et al (21 additional authors not shown)

GAW, acronym for Gamma Air Watch, is a Research and Development experiment in the TeV range, whose main goal is to explore the feasibility of large field of view Imaging Atmospheric Cherenkov Telescopes. GAW is an array of three relatively small telescopes (2.13 m diameter) which differs from the existing and presently planned projects in two main features: the adoption of a refractive optics system as light collector and the use of single photoelectron counting as detector working mode. The optics system allows to achieve a large field of view (24x24 squared degrees) suitable for surveys of large sky regions. The single photoelectron counting mode in comparison with the charge integration mode improves the sensitivity by permitting also the reconstruction of events with a small number of collected Cherenkov photons. GAW, which is a collaboration effort of Research Institutes in Italy, Portugal and Spain, will be erected in the Calar Alto Observatory (Sierra de Los Filabres - Andalucia, Spain), at 2150 m a.s.l.). The first telescope will be settled within Autumn 2007. This paper shows the main characteristics of the experiment and its expected performance.

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