GRB 211211A: AbAO optical observations

We observed the field of GRB 211211A (Fermi team GCN 31201, D'Ai et al. GCN 31202; Mangan et al. GCN 31210; Tamura et al. GCN 31226) with AS-32 telescope of Abastumani observatory (AbAO) in R-filter on 2021-12-13 (UT) 02:21:44 and 2021-12-14 (UT) 01:49:33. In the first epoch we marginally detected an afterglow (Zheng and Filippenko GCN 31203; Jiang et al. GCN 31213; Strausbaugh et al. GCN 31214; Ito et al. GCN 31217; de Ugarte Postigo et al. GCN 31218,31228,31229; Malesani et al. GCN 31221; Belles et al. GCN 31222; Kumar et al. GCN 31227). In the second epoch we obtained only an upper limit. Preliminary photometry of the field is following Date UT start t-T0 Filter Exp. OT Err. UL(3sigma) (mid, days) (s) 2021-12-13 02:21:44 1.56233 R 36*60 21.6 S/N=3 21.6 2021-12-14 01:49:33 2.52748 R 43*60 n/d n/d 21.8 The photometry is based on the nearby SDSS stars: SDSS-DR12 RA DEC R(Lupton transfoemations) 14:09:08.84448 +27:53:54.5604 15.833 14:09:04.53240 +27:54:10.4760 16.701 14:08:57.03480 +27:54:50.2632 17.677 14:08:57.87816 +27:55:06.0924 17.805 14:09:03.80928 +27:55:56.5464 17.104 14:09:07.89072 +27:55:43.9968 18.640