TITLE:   GCN CIRCULAR
NUMBER:  39326
SUBJECT: Fermi  trigger No 761206993: Global MASTER-Net observations report
DATE:    25/02/14 20:15:48 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>

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) started inspect of the Fermi GRB250214.27 (trigger No 761206993,23h 50m 45.60s , -06d 14m 24.0s, R=4.1) errorbox  43582 sec after notice time and 43595 sec after trigger time at 2025-02-14 18:29:44 UT, with upper limit up to  17.2 mag. Observations started at twilight.  The observations began at zenith distance = 78 deg. The sun  altitude  is -12.8 deg. 

The galactic latitude b = -65 deg., longitude l = 87 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2777879

We obtain a following upper limits.  

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

   43625 | 2025-02-14 18:29:44 |         MASTER-SAAO | (00h 03m 58.24s , -08d 29m 08.1s) |   C |    60 | 16.3 |        
   43838 | 2025-02-14 18:33:16 |         MASTER-SAAO | (00h 00m 16.36s , -10d 20m 51.8s) |   C |    60 | 16.7 |        
   44048 | 2025-02-14 18:36:46 |         MASTER-SAAO | (00h 04m 04.34s , -10d 21m 00.8s) |   C |    60 | 17.0 |        
   44127 | 2025-02-14 18:38:05 |         MASTER-SAAO | (00h 11m 16.32s , -06d 33m 56.5s) |   C |    60 | 17.0 |        
   44501 | 2025-02-14 18:44:20 |         MASTER-SAAO | (00h 11m 09.97s , -04d 40m 18.3s) |   C |    60 | 16.8 |        
   44583 | 2025-02-14 18:45:41 |         MASTER-SAAO | (00h 11m 15.93s , -08d 27m 11.1s) |   C |    60 | 17.2 |        
Filter C is a clear (unfiltred) band. 


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