GCN Circular 2253
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.