Performance of the imaging atmospheric Cherenkov telescope system of CANGAROO-III
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Abstract
The imaging atmospheric Cherenkov telescope system of CANGAROO-III has been in full operation with four 10 meter diameter telescopes since March 2004 near Woomera, South Australia. The system is used to study gamma-ray astrophysics at sub-TeV energies in the southern hemisphere. The performance of the stereoscopic system such as angular and energy resolutions for gamma rays has been investigated using Monte Carlo simulations, which are based on various calibration results, e.g., calibration of light collection efficiency using muon ring images. We present the estimated performance of the CANGAROO-III system as well as the reliability of our simulation code, comparing simulation results with observed data.