Angular Resolution of the Pachmarhi Array of Cerenkov Telescopes

Details Angular Resolution of the Pachmarhi Array of Cerenkov Telescopes Angular Resolution of the Pachmarhi Array of Cerenkov Telescopes

2002-04-07

arxiv.org/abs/astro-ph/0204112v1

Astropart.Phys.18:333-349,2003

Astronomy and Astrophysics

Astrophysics

26 pages, 11 Postscript figures; uses elsart.cls. To appear in Astroparticle Physics

Scientific paper

10.1016/S0927-6505(02)00148-2

The Pachmarhi Array of Cerenkov Telescopes consists of a distributed array of 25 telescopes that are used to sample the atmospheric Cerenkov Photon showers. Each telescope consists of 7 parabolic mirrors each viewed by a single photo-multiplier tube. Reconstruction of photon showers are carried out using fast timing information on the arrival of pulses at each PMT. The shower front is fitted to a plane and the direction of arrival of primary particle initiating the shower is obtained. The error in the determination of the arrival direction of the primary has been estimated using the {\it split} array method. It is found to be $\sim 2.4^\prime ~$ for primaries of energy $ > 3 \~TeV$. The dependence of the angular resolution on the separation between the telescopes and the number of detectors are also obtained from the data.

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