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Title: Auxiliary control systems for Pachmarhi array of Cverenkov telescopes
Authors: Gothe, K. S
Acharya, B. S
Bhat, P. N
Chitnis, V. R
D'Souza, A. I
Francis, P. J
John, A. V
Joshi, S. R
Majumdar, P
Nagesh, B. K
Pose, M. S
Purohit, P. N
Rahman, M. A
Rao, K. K
Rao, S. K
Sharma, S. K
Singh, B. B
Stanislaus, A. J
Sudershanan, P. V
Upadhya, S. S
Venkateshmurthy, B. L
Vishwanath, P. R
Keywords: Telescope Orientation;Control Systems;PACT;Atmospheric Cverenkov Technique;Ground Based Gamma-Ray Astronomy
Issue Date: 2002
Publisher: Astronomical Society of India
Citation: BASI, Vol. 30, No. 1, pp. 397 - 402
Abstract: Pachmarhi Array of Cverenkov Telescopes (PACT) consists of 25 Telescopes deployed over an area of 100m x 80m. The experiment is based on atmospheric Cverenkov technique to detect Very High Energy celestial gamma-rays using wavefront sampling method. Each telescope consists of 7 large area parabolic mirrors mounted para-axially on an equatorial mount and a fast photo-multiplier tube at the focus of each mirror. For efficient operation of the experiment 3 automated control systems were developed and installed, viz. Automated Computerized Telescope Orientation System (ACTOS) to control the pointing and tracking of individual telescopes, Automatic Photo-multiplier Exposure System (APES) to facilitate the exposure of photo-tubes only during observations, and Computerized Automated Rate Adjustment and Monitoring System (CARAMS) to ensure uniform gains for all the phototube - mirror systems. The design features and performance of each of these systems are discussed.
Appears in Collections:BASI Publications

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