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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2253 SUBJECT: GRB 030528: Optical observations at RIKEN DATE: 03/05/28 18:12:52 GMT FROM: Ken ichi Torii at RIKEN <torii@crab.riken.go.jp> K. Torii (RIKEN) reports: The entire SXC error region of GRB 030528 (HETE trigger 2724, Sequence number 6) was observed by the automated system at RIKEN. Observations with 0.20-m telescope (f/4.0, equipped with unfiltered AP7p) and 0.25-m telescope (f/6.8, equipped with unfiltered AP6E) started at 13:04:48 UT and 13:05:31 UT on 2003 May 28, respectively. Preliminary inspection of the first frame from the 0.25-m telescope (60-s integration) does not show an optical transient candidate brighter than about 15.8 mag (USNO-A2.0 red magnitude). Further analysis and observation are in progress.
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