TITLE: GCN CIRCULAR NUMBER: 30851 SUBJECT: GRB 210919A: AbAO optical upper limit DATE: 21/09/19 09:24:53 GMT FROM: Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru> N. Pankov (HSE, IKI), R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI), S. Belkin (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 short GRB 210919A (Tohuvavohu et al. GCN 30846) with AS-32 telescope of Abastumani observatory (AbAO) in R-filter starting on Sep., 19 (UT) 00:48:33. We do not detect any object in the enhanced XRT position (Goad et al. GCN 30850). This is consistent with optical observations (Tohuvavohu et al. GCN 30846; Lipunov et al., GCN 30847; Hu et al. GCN 30848; Strausbaugh et al. GCN 30849). Preliminary photometry of the field is following Date UT start t-T0 Filter Exp. OT Err. UL(3sigma) (mid, days) (s) 2021-09-19 00:48:33 0.03194 R 52*60 n/d n/d 22.1 The photometry is based on the nearby SDSS stars: SDSS-DR12 R(Lupton) 5:21:01.5917 +1:18:14.862 17.82 5:20:58.8314 +1:18:59.733 18.36