Optical measurements with cooled CCD cameras for CANGAROO-III
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Abstract
CANGAROO-III consists of four telescopes installed in Woomera, South Australia to observe celestial γ-ray sources by detecting Cherenkov light from air showers. Stereo observations have been performed since March 2004 with an improved angular resolution and a lower energy threshold. In this paper, we present some preliminary results of optical measurements by cooled CCD cameras.