TITLE: GCN CIRCULAR NUMBER: 19638 SUBJECT: GRB 160629A: Global MASTER Net Prompt OT observations DATE: 16/07/01 11:58:48 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, P.Balanutsa, E. Gorbovskoy, N.Tyurina, V.Kornilov, A.Kuznetsov, D.Kuvshinov, Lomonosov Moscow State University, Sternberg Astronomical Institute D.Buckley, S. Potter, A.Kniazev, M.Kotze South African Astronomical Observatory O.Gres, K.Ivanov, S.Yazev, N.M.Budnev, O.Chuvalaev, V.A.Poleshchuk Irkutsk State University A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik Kislovodsk Solar Station of the Pulkovo Observatory V.Yurkov, Yu.Sergienko, A.Gabovich, E.Sinyakov Blagoveschensk Educational State University, Blagoveschensk Ricardo Podesta, Carlos Lopez and Federico Podest Observatorio Astronomico Felix Aguilar (OAFA) Hugo Levato and Carlos Saffe Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE) MASTER-IAC robotic telescope (MASTER-Net: http://observ.pereplet.ru) was pointed to the INTEGRAL GRB 160629A (Gotz et al., GCN19621) 41 sec after GBM trigger at 2016-06-29 22:20:10 UT by two tubes during Gamma Ray active phase (see Gotz et al., GCN19621). We use trigger time 22 19 30 (Gotz et al., GCN19621). The OT magnitude is ~ 16.6 MASTER-Kislovodsk robotic telescope (MASTER-Net: http://observ.pereplet.ru) located near Kislovodsk was pointed to the GRB160629A 201 sec trigger time at 2016-06-29 22:24:11 UT. On our first (20s exposure) image we found 1 optical transient within INTEGRAL error-box (ra=00 20 16 dec=+77 04 43 r=0.051667) brighter then 18.5. T-Tmid Date Time Expt. Mag ---------|---------------------|-------|------- 134 2016-06-29 22:21:44 20 ~17.0 The OT found at position: 00h 19m 27.21s (+-0.09 s = +-1.4 arcsec ) +76d 58' 01".0 ( +-0.2 arcsec) (Cf. with TAROT coordinates Klotz et al., GCN 19622 and Sokolov et al., GCN 19623). The preliminary light curve is available at master.sai.msu.ru/static/OT/MASTERGRB160629A.png The message may be cited.