TITLE: GCN CIRCULAR NUMBER: 27467 SUBJECT: GRB 200325B: Mondy continued observations DATE: 20/03/29 12:18:52 GMT FROM: Alexei Pozanenko at IKI, Moscow S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), E. Mazaeva (IKI), A. Volnova (IKI) report on behalf of IKI-GRB-FuN: We observed the MASTER OT J111012.51+274912.8 (Lipunov et al., GCN 27446) afterglow of the Fermi GRB 200325B (Fermi GBM team, GCN 27441) with AZT-33IK 1.5-m telescope of Sayan observatory (Mondy) starting on 2020-03-28 (UT) 14:50:17. Preliminary photometry of the OT is following. Date UT start t-T0 Filter Exp. OT Err UL(3sigma) (mid, days) (s) 2020-03-28 14:50:17 3.01182 R 20*120 21.82 0.13 23.4 the photometry is based on nearby SDSS-DR12 stars RA DEC R(Lupton transformations) 167.569191 27.848262 16.015 167.513655 27.832992 16.930 167.510507 27.850424 15.261