GCN Circular 46258

Subject

SVOM GRB261113.60: Global MASTER-Net OT detection

Event

GRB 261113A

Date

2026-11-13T21:17:11Z (2 days ago)

Edited On

2026-11-14T13:40:15Z (a day ago)

From

Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

Edited By

Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Vladimir Lipunov at Lomonosov Moscow State University, MASTER Global Robotic NET PI <lipunov2007@gmail.com>

Via

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