TITLE: GCN CIRCULAR NUMBER: 13691 SUBJECT: GRB 120819A: MASTER final limits DATE: 12/08/20 13:27:06 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs E. Gorbovskoy, D.Denisenko, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski,N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov Sternberg Astronomical Institute, Moscow State University V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik Kislovodsk Solar Station of the Pulkovo Observatory V.Krushinski, I.Zalozhnih, A. Popov Ural Federal University, Kourovka Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) Claudio Mallamaci, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru) located in Blagoveschensk was pointed to the GRB120819A (Beardmore et al., GCN 13681) 25 sec after notice time and 115 sec after GRB time at 2012-08-19 13:12:10.052 UT (Yurkov et. al, GCN 13682). Unfiltered observations were carried out on high zenith distance (78 deg. at the observations beginning moment and above). The unfiltered magnitude is calibrated relative to USNO B1.0 (0.8 R + 0.2 B). After the data processing we have the following results: Start Middle Stop T-Tgrb Coadd Exp.time Limit 2012-08-19 13:12:10 13:12:20 13:12:30 125 1 20 16.5 2012-08-19 13:12:10 13:15:00 13:17:51 285 6 140 17.8 2012-08-19 13:19:08 13:39:35 14:00:02 1785 10 1800 18.5 The message may be cited.