GCN Circular 42886

Subject
EP251129a: Global MASTER-Net observations report
Event
EP251129a
Date
2025-11-29T05:36:20Z (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) was pointed to the EP251129a ( EP Team et al., GCN 42884Loading...
 
 ) errorbox 107 sec after trigger time at 2025-11-29 03:16:10 UT, with upper limit up to  17.6 mag. Observations started at twilight.  The observations began at zenith distance = 44 deg. The sun  altitude  is -11.4 deg. 

The galactic latitude b = 36 deg., longitude l = 116 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=3054702

We obtain a following upper limits.  

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

     167 | 2025-11-29 03:16:10 |   MASTER-Kislovodsk | (14h 59m 24.03s , +79d 38m 56.6s) |   C |   120 | 17.2 |        
     287 | 2025-11-29 03:16:10 |   MASTER-Kislovodsk | (14h 59m 24.03s , +79d 38m 56.6s) |   C |   360 | 17.6 |  Coadd 
     167 | 2025-11-29 03:16:10 |   MASTER-Kislovodsk | (15h 21m 34.38s , +79d 11m 04.2s) |   C |   120 | 17.4 |        
     307 | 2025-11-29 03:18:30 |   MASTER-Kislovodsk | (14h 59m 22.72s , +79d 39m 05.4s) |   C |   120 | 17.0 |        
     307 | 2025-11-29 03:18:30 |   MASTER-Kislovodsk | (15h 21m 33.89s , +79d 11m 14.4s) |   C |   120 | 17.1 |        
     447 | 2025-11-29 03:20:49 |   MASTER-Kislovodsk | (14h 59m 21.42s , +79d 39m 14.1s) |   C |   120 | 16.6 |        
     447 | 2025-11-29 03:20:49 |   MASTER-Kislovodsk | (15h 21m 32.90s , +79d 11m 24.4s) |   C |   120 | 16.7 |        
     587 | 2025-11-29 03:23:09 |   MASTER-Kislovodsk | (14h 59m 20.23s , +79d 39m 22.9s) |   C |   120 | 16.4 |        
     707 | 2025-11-29 03:23:09 |   MASTER-Kislovodsk | (14h 59m 20.29s , +79d 39m 22.8s) |   C |   360 | 17.0 |  Coadd 
     587 | 2025-11-29 03:23:09 |   MASTER-Kislovodsk | (15h 21m 29.63s , +79d 11m 35.4s) |   C |   120 | 14.6 |        
     727 | 2025-11-29 03:25:29 |   MASTER-Kislovodsk | (14h 59m 19.13s , +79d 39m 30.8s) |   C |   120 | 16.3 |        
     867 | 2025-11-29 03:27:49 |   MASTER-Kislovodsk | (14h 59m 17.67s , +79d 39m 36.8s) |   C |   120 | 16.1 |        
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