TITLE: GCN CIRCULAR NUMBER: 41715 SUBJECT: GRB 250905A: KAIT optical upper limit DATE: 25/09/05 04:51:12 GMT FROM: Weikang Zheng at UC Berkeley <weikang@berkeley.edu> WeiKang Zheng (UCB) and Alexei V. Filippenko (UCB) report on behalf of the KAIT GRB team: The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, observed the field of Swift GRB 250905A (Brivio et al., GCN 41714) starting at 03:14 UT, ~64 minutes after the burst. A set of 34x60s clear (roughly R) filter images were obtained under twilight condition. We do not detect any new optical counterpart candidate within the XRT error circles (Brivio et al., GCN 41714), down to an upper limit of about 20.0 (Vega) mag at a mid time of 94 minutes after the burst. View this GCN Circular online at https://gcn.nasa.gov/circulars/41715. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...