GCN Circular 42821

Subject
Fermi GRB 251124a: Global MASTER-Net observations report
Event
GRB 251124A
Date
2025-11-24T15:30:22Z (3 days ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
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, I. Gorbunov (Lomonosov MSU),
O.Gress, N.Budnev (ISU),
C.Francile,  F. Podesta, R.Podesta, E. Gonzalez  (Observatorio Astronomico Felix Aguilar (OAFA),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
A.Sosnovskij (CrAO),
A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity),
D.Buckley (SAAO),
R.Rebolo (The Instituto de Astrofisica de Canarias),
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) 

MASTER-Kislovodsk robotic telescope  [1]  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB 251124a ( Fermi GBM team, GCN 42820Loading...
 
 ) errorbox  5857 sec after notice time and 5878 sec after trigger time at 2025-11-24 14:36:01 UT, with upper limit up to  13.0 mag. Observations started at twilight.  The observations began at zenith distance = 62 deg. The sun  altitude  is -10.2 deg. 

The galactic latitude b = 29 deg., longitude l = 38 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=3050796

We obtain a following upper limits.  

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

    5938 | 2025-11-24 14:36:01 |   MASTER-Kislovodsk | (17h 11m 31.23s , +16d 54m 33.8s) |  P- |   120 | 12.6 |        
    6078 | 2025-11-24 14:38:21 |   MASTER-Kislovodsk | (17h 11m 31.15s , +16d 54m 22.6s) |  P- |   120 | 12.5 |        
    6218 | 2025-11-24 14:40:41 |   MASTER-Kislovodsk | (17h 11m 32.20s , +17d 16m 49.8s) |  P| |   120 | 12.2 |        
    6218 | 2025-11-24 14:40:41 |   MASTER-Kislovodsk | (17h 11m 31.11s , +16d 54m 13.1s) |  P- |   120 | 13.0 |        


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