GCN Circular 43738

Subject
EP260213a: Global MASTER-Net observations report
Event
EP260213a
Date
2026-02-14T17:27:19Z (12 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-Tunka robotic telescope  [1]  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the EP260213a ( EP Team et al., GCN 43729Loading...
 
 ) errorbox  46720 sec after notice time and 70986 sec after trigger time at 2026-02-14 15:41:46 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 58 deg. The sun  altitude  is -47.0 deg. 

The galactic latitude b = 56 deg., longitude l = 253 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=3135046

We obtain a following upper limits.  

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

   71017 | 2026-02-14 15:41:46 |        MASTER-Tunka | (11h 05m 53.43s , +05d 16m 04.4s) |   C |    60 | 15.9 |        
   71017 | 2026-02-14 15:41:46 |        MASTER-Tunka | (11h 06m 18.51s , +05d 10m 06.9s) |   C |    60 | 19.8 |        
   72842 | 2026-02-14 16:12:12 |        MASTER-Tunka | (11h 05m 50.85s , +05d 10m 39.1s) |   C |    60 | 15.4 |        
   72842 | 2026-02-14 16:12:12 |        MASTER-Tunka | (11h 06m 16.94s , +05d 03m 46.6s) |   C |    60 | 19.6 |        
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