TITLE: GCN CIRCULAR NUMBER: 31789 SUBJECT: GRB 220325A: MASTER Global Robotic Net optical observations DATE: 22/03/25 20:18:18 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V.Lipunov, D.Vlasenko, A.Kuznetsov, O.Gress, E.Gorbovskoy, N.Tyurina, P.Balanutsa, K.Zhirkov, A.Chasovnikov, G.Antipov, V.Senik, D.Kuvshinov, V.Topolev,Ya.Kechin, Yu.Tselik (Lomonosov Moscow State University, SAI, Physics Department), C.Francile, R. Podesta, C.Lopez, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA), D.A.H.Buckley (SAAO), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), N.M.Budnev (ISU,API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational State University) MASTER-Amur robotic telescope (Global MASTER-Net: http://observ.pereplet.ru,Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) was pointed to the SWIFT GRB 220325A ( M. Ferro et al., GCN 31787) errorbox 3287 sec after notice time (3306 sec after trigger time) at 2022-03-25 18:11:29 UT between rain with snow with upper limit up to 15.1 mag. The observations started at zenith distance = 69 deg. The sun altitude was -28.4 deg. The galactic latitude b = 8 deg., longitude l = 21 deg. Real time updated cover map is available: https://master.sai.msu.ru/site/master2/observ.php?id=1921440 The observation and reduction will continue. The message may be cited.