GCN Circular 44614

Subject
EP260514a: Global MASTER-Net observations report
Event
EP260514a
Date
2026-05-15T03:27:20Z (5 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-OAFA robotic telescope  [1]  located in Argentina (OAFA observatory of San Juan National University) was pointed to the EP260514a ( EP Team et al., GCN 44613Loading...
 
 ) errorbox 35348 sec after trigger time at 2026-05-15 02:45:14 UT, with upper limit up to  18.6 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -63.2 deg. 

The galactic latitude b = 62 deg., longitude l = 91 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=3315353

We obtain a following upper limits.  

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

   35378 | 2026-05-15 02:45:14 |         MASTER-OAFA | (14h 15m 58.14s , +49d 22m 48.5s) |   C |    60 | 18.0 |        
   35443 | 2026-05-15 02:46:19 |         MASTER-OAFA | (14h 15m 57.12s , +49d 22m 52.2s) |   C |    60 | 18.0 |        
   35509 | 2026-05-15 02:47:24 |         MASTER-OAFA | (14h 15m 56.10s , +49d 22m 55.1s) |   C |    60 | 18.3 |        
   35575 | 2026-05-15 02:48:31 |         MASTER-OAFA | (14h 15m 54.95s , +49d 22m 57.3s) |   C |    60 | 18.2 |        
   35641 | 2026-05-15 02:49:37 |         MASTER-OAFA | (14h 15m 54.43s , +49d 23m 01.2s) |   C |    60 | 18.3 |        
   35701 | 2026-05-15 02:49:37 |         MASTER-OAFA | (14h 15m 54.41s , +49d 23m 01.1s) |   C |   180 | 18.6 |  Coadd 
   35707 | 2026-05-15 02:50:42 |         MASTER-OAFA | (14h 15m 54.22s , +49d 23m 03.8s) |   C |    60 | 18.2 |        
   35773 | 2026-05-15 02:51:49 |         MASTER-OAFA | (14h 15m 54.02s , +49d 23m 06.1s) |   C |    60 | 17.9 |        
   35838 | 2026-05-15 02:52:54 |         MASTER-OAFA | (14h 15m 53.77s , +49d 23m 08.7s) |   C |    60 | 18.0 |        
   35904 | 2026-05-15 02:53:59 |         MASTER-OAFA | (14h 15m 53.54s , +49d 23m 11.4s) |   C |    60 | 18.1 |        
   35970 | 2026-05-15 02:55:05 |         MASTER-OAFA | (14h 15m 53.30s , +49d 23m 11.7s) |   C |    60 | 18.2 |        
   36035 | 2026-05-15 02:56:11 |         MASTER-OAFA | (14h 15m 53.06s , +49d 23m 14.8s) |   C |    60 | 18.4 |        
   36101 | 2026-05-15 02:57:16 |         MASTER-OAFA | (14h 15m 52.80s , +49d 23m 16.2s) |   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