TITLE: GCN CIRCULAR NUMBER: 8081 SUBJECT: GRB 080810 : optical observation with KANATA DATE: 08/08/10 13:51:42 GMT FROM: Akira Arai at Hiroshima U Y. Ikejiri, M. Uemura, T. Ohsugi, K. Kawabata, A. Arai, M. Yamanaka, and K. Sakimoto (Hiroshima Univ.), report on behalf of the KANATA GRB team: We performed optical-NIR observations of the field of GRB 080810 (GCN Circ. 8080) with TRISPEC attached to the "KANATA" 1.5-m telescope. We confirmed a very bright, fading object at the position of the optical afterglow detected with UVOT. Our preliminary results are below: time(UT) mag. exposure_time Aug. 2008 (sec) 10.553258 13.7 ± 0.1 V 33sec * 1 Comparison star: 23:46:58.51 +00:18:30.2 V=14.07 (NOMAD) Further observation and analysis are ongoing.