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Observation of HESS J 1303 − 631 with the CANGAROO − III telescopes

HESS J1303−631 is one of the unidentified TeV gamma-ray sources which H.E.S.S. group discovered as a diffuse source. We observed HESS J1303−631 between February and May in 2006 with the CANGAROO−III imaging atmospheric Cherenkov telescope system. After considering the weather conditions, the total live time was about 34 hours. Here we report our preliminary results of HESS J1303−631 observation.