GCN Circular 33069
B. Gendre, H. Crisp, E. Moore, F. Panther, D. Coward, J. A. Moore (OzGrav-UWA), A. Klotz (IRAP-CNRS-OMP), and P. Thierry (AGORA), report: We imaged the field of GRB 221216A detected by SWIFT (trigger 1144698) with the Zadko robotic telescope (D=100cm) located at the observatory - Gingin, Australia. The observations started 1.39h after the GRB trigger. The elevation of the field decreased from 35 degrees above horizon and weather conditions were good. On individual images taken between t0+4994.4s and t0+7433.4s, we do not detect any OT with a limiting magnitude of: R > 17.5 On a co-added series of exposures between t0+4993s to t0+6613s, we estimated a limiting magnitude of R > 19.0 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon= 10.7381 lat=-49.4597 and the galactic extinction in R band is 0.1 magnitudes estimated from D. Schlegel et al. 1998ApJ...500..525S. This message may be cited.