Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: GAW (Gamma Air Watch): a novel imaging Cherenkov telescope   GAW (Gamma Air Watch) is a new imaging Cherenkov telescope designed for
observation of very high-energy gamma-ray sources. GAW will be equipped with a
3 meter diameter Fresnel lens as light collector and with an array of 300
multi-anode photomultipliers at the focal plane. The pixel size will be 4
arcmin wide for a total field of view of 10.5 degrees. Whith respect to the
planned imaging Cherenkov telescopes (CANGAROO III, HESS, MAGIC, VERITAS) GAW
follows a different approach for what concerns both the optical system and the
detection working mode: the Cherenkov light collector is a single acrylic flat
Fresnel lens (instead of mirrors) that allows to achieve wide field of view;
the photomultipliers operate in single photoelectron counting mode (instead of
charge integration). The single photoelectron counting mode allows to reach a
low energy threshold of ~200 GeV, in spite of the relatively small dimension of
the GAW optic system.

11
The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
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The categories of this paper are: q-alg
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
2
The categories of this paper are: math