TITLE: GCN CIRCULAR NUMBER: 46258 SUBJECT: SVOM GRB261113.60: Global MASTER-Net OT detection DATE: 26/11/13 21:17:11 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Tunka robotic telescope [1] located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the GRB261113.60 16 sec after notice time and 74 sec after trigger time at 2026-11-13 14:32:14 UT. On our first (10s exposure) set we found 1 optical transient within SVOM error-box (ra=346.321 dec=5.14333 r=0.05) brighter than 17.9. T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 79 2026-11-13 14:32:14 10 (23h 05m 16.95s , +05d 10m 18.4s) 15.7 The 5-sigma upper limit has been about 17.9mag The message may be cited. [1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp.http : // www.pereplet.ru/lipunov/625.html