Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001exa....11...71c&link_type=abstract
Experimental Astronomy, v. 11, Issue 1, p. 71-79 (2001).
Astronomy and Astrophysics
Astronomy
1
Field Rotation, Gamma-Ray Astronomy, Imaging Telescope, Quality Factor
Scientific paper
The 349-pixel Cerenkov Light Imaging Camera of the γ-ray telescope array, TACTIC, has been recently commissioned at Mt. Abu, India. This telescope is being used for gamma-ray source observations at photon energies above 0.5 TeV. Comprehensive simulation studies, using the CORSIKA air-shower code, are in progress to predict and optimize the performance of the TACTIC. In this short note, we study the expected performance of the Imaging Element of the TACTIC under conditions of a pixel switch-off, forced either by the well-known star-rotation phenomenon or by a defective instrumentation channel. The changes in the image parameters, and the resulting telescope quality factor, are studied after simulating two representative cases of pixel shut-down.
Bhat C. L.
Charagi S. K.
Koul M. K.
Rannot R. C.
Sapru M. L.
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