GCN Circular 22577
A. Volnova (IKI), A. Pozanenko (IKI), E. Mazaeva (IKI), R. Inasaridze (AbAO), V. Ayvazian (AbAO), O. Kvaratskhelia (AbAO), G. Kapanadze (AbAO), I. Molotov (KIAM), report on behalf of larger GRB follow-up collaboration: We observed the field of GRB 180331B (Lien et al., GCN 22573) with AS-32 (0.7m) telescope of Abastumani Observatory starting on Mar. 31 (UT) 17:49:41. We do not detect any object within enhanced XRT position (Goad et al., GCN 22575). Preliminary photometry of the field is following. Date UT start t-T0 Filter Exp. OT Err. UL (mid, days) (s) 2018-03-31 17:49:41 0.11370 CR 38*60 n/d n/d 22.3 The photometry is based on nearby USNO-B1.0 stars (R2 magnitude).