Аннотация:https://gcn.gsfc.nasa.gov/gcn3/28348.gcn3MASTER-OAFA robotic telescope (Global MASTER-Net http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, v.2010, 30L)started in alert mode (Lipunov et al. GCN 28334)Swift GRB 200901A (Simpson et al. GCN 28335, Sakamoto et al. GCN 28344) errorbox observation 25s after notice time (46s after trigger time) at 2020-09-01 03:48:18 UT.There is OT at XRT (Kennea et al. GNC 28341) and UVOT (Breeveld et al. GCN 28342) positionfirst 20 minutes after trigger time.Data analysis will continue.