TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1521 SUBJECT: GRB 020812: optical observation at Kyoto University DATE: 02/08/23 10:39:22 GMT FROM: Taichi Kato at Kyoto U M. Uemura, R. Ishioka, T. Kato (Kyoto U) and H. Yamaoka (Kyushu U) report on behalf of VSNET-grb collaboration: "We have performed a full analysis of the unfiltered images of GRB 020812 field taken at Kyoto University. A 30-cm telescope observed the central part of the on-board HETE WXM error box, and a 25-cm telescope observed three fields of view, each of which covered a part of HETE WXM error box (GCN 1468) (http://www.rc.kyushu-u.ac.jp/~yamaoka/GRB020812/FOVkyoto.gif). The limiting magnitudes are measured by compareing with USNO-A2.0 red magnitudes. FOV 25-cm 1 25-cm 2 25-cm 3 30-cm epoch 11:36-13:25 13:27-13:57 13:57-15:32 11:40-13:26 Aug. 12 UT+ exp. 85 25.5 80 83.5 minutes lim.mag 18.7 18.6 18.8 19.1 in R By comparison with DSS 2 red image and Ouda images (GCN 1515), no new source brighter than the limits nor notable variable is detected." This message may be cited.