GCN Circular 46217

Subject
SVOM GRB261110.49: Global MASTER-Net observations report
Event
GRB 261110.49
Date
2026-11-10T18:28:59Z (a day ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
O.Gress, N.Budnev(ISU)

D.Buckley (SAAO),

V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko,  
G.Antipov,  A.Sankovich,  Yu.Tselik, Ya..Kechin, V.Senik, A.Chasovnikov, K.Labsina (Lomonosov MSU)

A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)
A.Sosnovskij (Lomonosov MSU)

A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo 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)

R.Rebolo (The Instituto de Astrofisica de Canarias)

M. Segura,  F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA)


MASTER-Tunka robotic telescope  [1]  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the SVOM GRB261110.49 (trigger No 1794311359,23h 23m 00.91s , +33d 02m 18.6s, R=0.1721) errorbox  641 sec after notice time and 1159 sec after trigger time at 2026-11-10 12:08:39 UT, with upper limit up to  14.1 mag. The observations began at zenith distance = 22 deg. The sun  altitude  is -25.5 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) was pointed to the SVOM GRB261110.49 errorbox  21465 sec after notice time and 21984 sec after trigger time at 2026-11-10 17:55:43 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 66 deg. The sun  altitude  is -9.9 deg. 

The galactic latitude b = -26 deg., longitude l = 103 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=3532500

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

    1190 | 2026-11-10 12:08:39 |        MASTER-Tunka | (23h 21m 00.42s , +32d 47m 56.3s) |   C |    60 | 12.9 |        
    1190 | 2026-11-10 12:08:39 |        MASTER-Tunka | (23h 20m 53.15s , +32d 39m 03.2s) |   C |    60 | 14.1 |        
   22014 | 2026-11-10 17:55:43 |         MASTER-SAAO | (23h 19m 16.26s , +32d 56m 06.9s) |   C |    60 | 16.6 |        
   22014 | 2026-11-10 17:55:43 |         MASTER-SAAO | (23h 21m 15.92s , +32d 40m 41.3s) |   C |    60 | 16.7 |        
   22302 | 2026-11-10 18:00:31 |         MASTER-SAAO | (23h 19m 20.01s , +32d 55m 53.3s) |   C |    60 | 17.1 |        
   22302 | 2026-11-10 18:00:31 |         MASTER-SAAO | (23h 21m 19.72s , +32d 40m 25.4s) |   C |    60 | 17.3 |        
   22396 | 2026-11-10 18:02:05 |         MASTER-SAAO | (23h 19m 20.29s , +32d 54m 31.5s) |   C |    60 | 17.3 |        
   22396 | 2026-11-10 18:02:05 |         MASTER-SAAO | (23h 21m 19.95s , +32d 39m 01.9s) |   C |    60 | 17.3 |        
   22495 | 2026-11-10 18:03:44 |         MASTER-SAAO | (23h 19m 22.71s , +32d 56m 17.3s) |   C |    60 | 17.5 |        
   22495 | 2026-11-10 18:03:44 |         MASTER-SAAO | (23h 21m 22.41s , +32d 40m 47.2s) |   C |    60 | 17.5 |        
   22588 | 2026-11-10 18:05:17 |         MASTER-SAAO | (23h 19m 18.33s , +32d 55m 34.7s) |   C |    60 | 17.1 |        
   22589 | 2026-11-10 18:05:18 |         MASTER-SAAO | (23h 21m 17.97s , +32d 40m 03.4s) |   C |    60 | 17.0 |        
   22683 | 2026-11-10 18:06:52 |         MASTER-SAAO | (23h 19m 18.61s , +32d 56m 37.8s) |   C |    60 | 17.5 |        
   22683 | 2026-11-10 18:06:52 |         MASTER-SAAO | (23h 21m 18.28s , +32d 41m 06.3s) |   C |    60 | 17.4 |        
   22971 | 2026-11-10 18:11:40 |         MASTER-SAAO | (23h 19m 21.85s , +32d 55m 27.5s) |   C |    60 | 18.1 |        
   22971 | 2026-11-10 18:11:40 |         MASTER-SAAO | (23h 21m 21.40s , +32d 39m 42.1s) |   C |    60 | 18.1 |        
   23066 | 2026-11-10 18:13:15 |         MASTER-SAAO | (23h 19m 19.98s , +32d 56m 40.4s) |   C |    60 | 17.5 |        
   23066 | 2026-11-10 18:13:15 |         MASTER-SAAO | (23h 21m 19.48s , +32d 40m 53.9s) |   C |    60 | 17.6 |        
   23160 | 2026-11-10 18:14:49 |         MASTER-SAAO | (23h 19m 20.31s , +32d 55m 08.5s) |   C |    60 | 17.7 |        
   23160 | 2026-11-10 18:14:49 |         MASTER-SAAO | (23h 21m 19.74s , +32d 39m 21.0s) |   C |    60 | 17.8 |        
   23588 | 2026-11-10 18:21:57 |         MASTER-SAAO | (23h 19m 17.57s , +32d 55m 11.9s) |   C |    60 | 18.0 |        
   23588 | 2026-11-10 18:21:57 |         MASTER-SAAO | (23h 21m 17.22s , +32d 39m 23.6s) |   C |    60 | 18.1 |        
   23682 | 2026-11-10 18:23:31 |         MASTER-SAAO | (23h 19m 23.96s , +32d 55m 38.8s) |   C |    60 | 18.2 |        
   23682 | 2026-11-10 18:23:31 |         MASTER-SAAO | (23h 21m 23.54s , +32d 39m 49.5s) |   C |    60 | 18.4 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
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