TITLE: GCN CIRCULAR NUMBER: 31705 SUBJECT: GRB 220306B: AbAO optical observations, possible afterglow candidate DATE: 22/03/07 15:44:23 GMT FROM: Alexei Pozanenko at IKI, Moscow S. Belkin (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO), N. Pankov (HSE, IKI), D. Datashvili (AbAO), V. R. Ayvazian (AbAO), G. V. Kapanadze (AbAO) report on behalf of GRB IKI FuN: We observed  the field of Swift GRB 220306B (Caputo et al. GCN 31697) which is also detected by GBM/Fermi (Wood et al., GCN 31702) with AS-32 telescope of Abastumani observatory (AbAO) in R-filter starting on Mar. 06 (UT) 18:32:11. We detected the object at the edge (2.6 arcsec apart) of the enhanced XRT position (Evans et al. GCN 31700). The object is also presented in Pan-STARRS as a red source (objID 193630053894966412, r=21.42, i= 20.70, z=20.54). Due to non-optimal seeing we cannot discriminate a possible optical afterglow from the object. Preliminary aperture photometry of the object is following Date       UT start   t-T0    Filter Exp.    OT   Err.  UL(3sigma)                    (mid, days)    (s) 2022-03-06 18:32:11   0.02886  R     50*60  19.98 0.12    22.7 The R magnitude of the object seems to be brighter than R_mag deduced for the object assuming the object is a star. We may suggest the afterglow superimposed of the object (Pan-STARRS objID 193630053894966412) and the red PanSTARRS object could be a host galaxy of GRB 220306B.