Аннотация:MASTER Global Robotic Net (Lipunov et al. 2010, Advances in Astronomy, v.2010, 30L) started IceCube 20220220.60/ AMON NuEm-220220A alert (a coincidence alert from the IceCube online neutrino selection + HAWC daily monitoring analysis GCN #31615, https://gcn.gsfc.nasa.gov/other/icecube_220220A.gcn3 ) optical observations 25 sec after notice time (618s after trigger time) at 2022-02-20 14:29:55 UT at MASTER-Amur (Lipunov et al. GCN #31616) and observed it in MASTER-OAGH (Mexico), -SAAO (South Africa), -OAFA (Argentina), see cover map https://master.sai.msu.ru/site/master2/event.php?id=1889478 There is a blazar 5BZBJ1442+1200 (R.A.,Dec.(2000)=14 42 48.28 +12 00 40.28) 1.5 degrees from the center of current alert (Gress et al. GCN #31620).