Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-04-07
J.Phys.G25:1223-1233,1999
Astronomy and Astrophysics
Astrophysics
14 pages, 10 figure, accepted for publication in J. Phys. G: Nucl. Part. Phys
Scientific paper
10.1088/0954-3899/25/6/312
Atmospheric Cerenkov telescopes are used to detect electromagnetic showers from primary gamma rays of energy ~300 GeV - ~10 TeV and to discriminate these from cascades due to hadrons using the Cerenkov images. The geomagnetic field affects the development of showers and is shown to diffuse and distort the images. When the component of the field normal to the shower axis is sufficiently large (> 0.4 G) the performance of gamma ray telescopes may be affected, although corrections should be possible.
Chadwick Paula M.
Lyons Kelly
McComb T. J. L.
Orford K. J.
Osborne John L.
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