Аннотация:During Fermi GRB 211109A inspection (Fermi GCN #31058, Lipunov et al. GCN #31059, see S.Barthelmy https://gcn.gsfc.nasa.gov/other/211109A.gcn3 ) MASTER covered error box (cover map) and 25h after the trigger time(00:39:44 UT on 9 Nov 2021) found optical transient, not presented in VIZIER database, not presented in automatic MASTER archive light curve since Jan 2012 (up to 14m) and in Dec 2014 (up to 20.2).