TITLE: GCN CIRCULAR NUMBER: 35454 SUBJECT: GRB 240101B: KAIT Optical Upper Limit DATE: 24/01/02 07:23:47 GMT FROM: Weikang Zheng at UC Berkeley <weikang@berkeley.edu> WeiKang Zheng and Alexei V. Filippenko (UC Berkeley) report on behalf of the KAIT GRB team: The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at Lick Observatory, responded to Swift GRB 240101B (Cenko et al., GCN 35449) starting at 7.38 hours after the burst. A total of 31x60s images were obtained in the clear (roughly R) filters. We do not detect any optical afterglow candidate within the XRT position error circle (Cenko et al., GCN 35449), neither in single image, nor in the co-add images. The typical limiting magnitude of our single clear image is about 18.5 mag calibrated to the PS1 catalog. View this GCN Circular online at https://gcn.nasa.gov/circulars/35454. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...