TITLE: GCN CIRCULAR NUMBER: 33119 SUBJECT: GRB 221226B: LCOGT Optical Upper Limits DATE: 22/12/28 22:28:46 GMT FROM: Robert Strausbaugh at University of Minnesota R. Strausbaugh (University of Minnesota), A. Cucchiara (NASA) report on behalf of a larger collaboration: We observed the GRB 221226B (Cenko et al., GCN 33108) field with the LCOGT 1-meter Sinistro instrument at the South African Astronomical Observatory site, on December 27, from 19:40 to 20:07 UT (corresponding to 20.98 to 21.47 hours from the GRB trigger time) with the SDSS r and i filters. We performed a series of 3x300s exposures in each band. We do not detect any new sources in the XRT error region, in either band. The following upper limits are calculated using the SkyMapper catalog as reference: r > 20.75 i > 20.16 These magnitudes are not corrected for galactic extinction.