TITLE: GCN CIRCULAR NUMBER: 23690 SUBJECT: GRB 190114C: MASTER afterglow Detection DATE: 19/01/14 21:39:56 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs N.Tyurina, V. Lipunov, A.Kuznetsov, E. Gorbovskoy, V.Kornilov, D.Kuvshinov, P.Balanutsa,D. Vlasenko Lomonosov Moscow State University, Sternberg Astronomical Institute, Moscow State University V. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev Blagoveschensk Educational State University, Blagoveschensk A. Tlatov, V.Senik, A.V. Parhomenko, D. Dormidontov Kislovodsk Solar Station of the Pulkovo Observatory K. Ivanov, O. Gres, N.M. Budnev, S. Yazev, O. Chuvalaev, V. Poleshchuk Irkutsk State University R. Podesta, Carlos Lopez and F. Podesta Observatorio Astronomico Felix Aguilar (OAFA) Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres The Instituto de Astrofisica de Canarias D. Buckley, S. Potter, A. Kniazev, M. Kotze South African Astronomical Observatory 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 GRB190114.87 25 sec after notice time and 47 sec after trigger time at 2019-01-14 20:57:51 UT. On our first (10s exposure) set we found 1 optical transient within SWIFT error-box (ra=54.5042 dec=-26.9383 r=0.05) brighter than 16.54. T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 52 2019-01-14 20:57:51 10 ( 3h 38m 01.17s , -26d 56m 46.73s) 11.21 The 5-sigma upper limit has been about 16.54mag The message may be cited.