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Title: Towards absolute gain calibration of the TACTIC imaging element
Authors: Tickoo, A. K
Dhar, V. K
Venugopal, K
Yadav, K. K
Kaul, S. K
Koul, R
Kothari, M. K
Goyal, H. C
Chandra, P
Bhatt, N
Bhat, C. L
Keywords: PMT Detectors;Absolute Gain Calibration;TACTIC Telescope
Issue Date: 2002
Publisher: Astronomical Society of India
Citation: BASI, Vol. 30, No. 1, pp. 381 - 384
Abstract: The imaging element of the 4-element TACTIC telescope array has been in operation at Mt. Abu since 1997, for carrying out detailed investigations of gamma-ray sources in the TeV energy range. In order to characterize the progenitor particle (gamma-ray / cosmic ray), a relative gain calibration system, based on a high intensity LED, has been in operation. However, for calorimetric purposes, an absolute gain calibration system is necessary and has been developed for on-line calibration of 4 out of 349- pixels of its imaging camera, using Am241 -based light pulsers. The details of the scheme followed and the results obtained so far are presented in this paper.
Appears in Collections:BASI Publications

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