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Title: Pachmarhi array of Cerenkov telescopes
Authors: Bhat, P. N
Acharya, B. S
Chitnis, V. R
D'Souza, A. I
Francis, P. J
Gothe, K. S
John, A. V
Mazumdar, P
Nagesh, B. K
Purohit, P. N
Rahman, M. A
Rao, S. K
Rao, K. K
Sharma, S. K
Stanislaus, A. J
Sudershanan, P. V
Swamy, M. R. K
Upadhyaya, S. S
Murty, B. L. V
Keywords: VHE γ-rays;Atmospheric Cerenkov Technique;PACT
Issue Date: 2000
Publisher: Astronomical Society of India
Citation: BASI, Vol. 28, No. 2, pp. 455 - 457
Abstract: Pachmarhi Array of Cerenkov Telescopes (PACT) consisting of 25 telescopes has been installed at Pachmarhi (longitude : 76d 26' E, latitude : 22d 28' N and altitude : 1075m) recently. The telescopes are deployed in the form of a 5 - 5 matrix spread over an area of 80m - 100m. The array is designed to detect celestial TeV gamma-rays by wavefront sampling technique as against the standard imaging technique used at other ?-ray observatories elsewhere in the world. Each telescope consists of 7 parabolic reflectors of 90 cm diameter and an f/d ~1. Each telescope is independently steerable on separate equatorial mounts operated through a computer based control system capable of orienting them with an angular accuracy better than 0.2d. The pointing is monitored in real time to maintain a source tracking accuracy of better than 0.1d. We will discuss the array design, its suitability for wavefront sampling and its pointing capabilities.
Appears in Collections:BASI Publications

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