TITLE: GCN CIRCULAR NUMBER: 33330 SUBJECT: GRB 230216A: AKO Upper Limit DATE: 23/02/16 17:17:11 GMT FROM: Mohammad Odeh at Al Khatim Observatory M44 Mohammad Odeh of Al-Khatim Observatory (AKO) operated by the International Astronomical Center, in Abu Dhabi, UAE. As a follow up for the GRB 230216A detected by Swift (GCN 33328), we observed the field of the GRB with our 0.35m f/7.7 robotic telescope. The observation was done on 16 February 2023 from 16:39:17 to 16:51:39 (UT), 1.8 hours after the GRB trigger. We obtained multiple 180-sec exposures in Ic filter. We did not detect any afterglow within XRT localization. Though, the star USNO-B1 0819-0175793 lies within the XRT error box, which might hide a possible afterglow. This is consistent with the report of (Gendre et al., GCN 33329). The following upper limit was calculated using Atlas catalogue as a reference: ---------------------------------------------------------------------------- - JD (mid), T_mid-T0(hrs), Exposure (sec), Filter, Lim_mag ---------------------------------------------------------------------------- - 2459992.199329, 1.8, 3 x 180 (stacked), Ic, > 19.3 ---------------------------------------------------------------------------- - These magnitudes are not corrected for galactic extinction.