Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002basi...30..381t&link_type=abstract
Bulletin of the Astronomical Society of India, Vol.30, p. 381-384
Astronomy and Astrophysics
Astronomy
2
Pmt Detectors, Absolute Gain Calibration, Tactic Telescope
Scientific paper
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.
Bhat C. L.
Bhatt Nilay
Chandra Poonam
Dhar V. K.
Goyal H. C.
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