TITLE: GCN CIRCULAR NUMBER: 26168 SUBJECT: Swift GRB191105.01: Global MASTER-Net OT detection DATE: 19/11/05 00:23:57 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias V. Lipunov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko, F. Balakin Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory V. Yurkov, A. Gabovich, Yu. Sergienko Blagoveschensk Educational State University, Blagoveschensk D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) Hugo Levato Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) MASTER-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) was pointed to the GRB191105.01 38 sec after notice time and 57 sec after trigger time at 2019-11-05 00:09:55 UT. On our 3-th (30s exposure) set , obtained 134 sec after tigger time at 2019-11-05 00:11:13 UT, we found 1 optical transient within Swift error-box (ra=293.742 dec=21.9147 r=0.05) brighter than 14.22. T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 149 2019-11-05 00:11:13 30 (19h 34m 49.505s , +21d 56m 28.09s) 13.98 The 5-sigma upper limit has been about 14.22mag The message may be cited.