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.