TITLE: GCN CIRCULAR NUMBER: 7329 SUBJECT: GRB 071010B : Early optical brightening detected by TAOS DATE: 08/02/26 08:57:15 GMT FROM: Kuiyun Huang at ASIAA K. Y. Huang, M. E. Schwamb, J. H. Wang, C. Y. Wen, and TAOS team The 3 automatic 0.5-m telescopes of the TAOS (Taiwan American Occultation Survey, located at Lulin Observatory) started to observe GRB 071010B at 52s after the burst. The afterglow (Kann et al. GCN 6884) was detected in our 5s and 25s images. Due to twilight, the TAOS telescopes stopped taking images around 4 minutes after the burst. The afterglow, did not show significant decay but a mild increase during our observations. Our high resolution data and other measurements within 2 days indicate that GRB 071010B is composed of a slightly early brightening behavior and a shollow decay (Wang et al.). We note that special filter (5000-7200 A) was used in TAOS telescopes. This message may be cited.