TITLE: GCN CIRCULAR NUMBER: 19099 SUBJECT: GRB 160227A: MASTER OT Detection DATE: 16/02/27 19:49:53 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, V. Lipunov,N.Tyurina, V.Kornilov, P.Balanutsa, A.Kuznetsov, D.Kuvshinov Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University A.Gabovich, V.Yurkov, Yu.Sergienko, D.Varda Blagoveschensk Educational State University, Blagoveschensk K.Ivanov, N.M.Budnev, O.Gres, V.A.Poleshchuk Irkutsk State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory R. Rebolo, M. Serra-Ricart, N. Lodieu, G. Israelian The Instituto de Astrofisica de Canarias D.Buckley, S. Potter, M.Kotze South African Astronomical Observatory MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Ural was pointed to the GRB160227A 30 after notice time and 115 sec after trigger time at 2016-02-27 19:34:03 UT. On our first (20s exposure) set we found 1 optical transient within SWIFT error-box (ra=12 59 08 dec=+78 38 19 r=0.050000) brighter then 17.6. RA 12h 59m 14.13s DEC +78d 40m 44.2s mag~17.36 The 5-sigma upper limit has been about 18.0 The message may be cited.