TITLE: GCN CIRCULAR NUMBER: 35270 SUBJECT: GRB 231205B: AKO Optical Upper Limit DATE: 23/12/05 18:46:35 GMT FROM: Mohammad Odeh at Al Khatim Observatory M44 <mshodeh@gmail.com> Mohammad Odeh (Al-Khatim Observatory, AKO, operated by the International Astronomical Center in Abu Dhabi, UAE), and Dalya Akl (American University of Sharjah, UAE), report: We observed the field of GRB 231205B, which was detected by Swift/BAT (GCN 35269) with our 0.36m f/7.7 robotic telescope on December 05 starting at 17:37:44 UT (corresponding to 0.9 hours from the GRB trigger time) using an (Ic) filter. We obtained 17x180s images. We do not detect a credible source within the Swift-XRT error region (Evans et al., GCN 35269). The following 5-sigma upper limit is calculated using the ATLAS catalog as a reference: Ic = 20.0. View this GCN Circular online at https://gcn.nasa.gov/circulars/35270. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...