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GCN Circular 38944

Subject
Integral GRB250114.55: Global MASTER-Net observations report
Date
2025-01-14T18:57:44Z (2 months ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
V.Lipunov, E.Gorbovskoy, N.Tiurina,  P.Balanutsa, , D.Vlasenko, I.Panchenko,
A.Kuznetsov,  G.Antipov,  A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, 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. 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-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the Integral GRB250114.55 (trigger No 11025,03h 15m 27.69s , -02d 18m 51.9s, R=0.053) errorbox  19302 sec after notice time and 19352 sec after trigger time at 2025-01-14 18:38:09 UT, with upper limit up to  17.6 mag. Observations started at twilight.  The observations began at zenith distance = 30 deg. The sun  altitude  is -10.0 deg. 

The galactic latitude b = -47 deg., longitude l = 184 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2743271

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   19383 |         MASTER-SAAO |   C |    60 | 17.1 |        
   19522 |         MASTER-SAAO |   C |   180 | 16.8 |        
   19722 |         MASTER-SAAO |   C |   180 | 17.1 |        
   19921 |         MASTER-SAAO |   C |   180 | 17.6 |        
   20123 |         MASTER-SAAO |   C |   180 | 17.6 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.