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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2362 SUBJECT: GRB030823: optical observation at Tokyo Tech DATE: 03/08/24 05:00:32 GMT FROM: Nobuyuki Kawai at Tokyo Tech <nkawai@hp.phys.titech.ac.jp> M. Suzuki, Y. Yatsu, Y. Kuramoto, and N. Kawai report: "We have observed the field covering the entire SXC error box of GRB030823 (HETE trigger 2818; trigger time 08:52:40 UT) with the unfiltered CCD camera on the 30-cm telescope at Tokyo Tech, beginning at 10:43:19 UT. We started the observation earlier than the GCN notice, since M.S., as a member of the HETE ops team, had access to the preliminary WXM ground location before its validity was evaluated. Visual inspection of the images revealed no obvious new source compared with the DSS 2 (red) to an approximate limiting magnitude of 16.5."
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