GCN Circular 43094
Subject
Fermi trigger No 787396657: Global MASTER-Net observations report
Date
2025-12-14T12:15:41Z (a day ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
email
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) started inspect of the Fermi GRB251214.39 (trigger No 787396657,23h 11m 00.00s , +35d 42m 36.0s, R=7.23) errorbox 7860 sec after notice time and 7881 sec after trigger time at 2025-12-14 11:28:54 UT, with upper limit up to 19.8 mag. The observations began at zenith distance = 17 deg. The sun altitude is -22.1 deg.
The galactic latitude b = -23 deg., longitude l = 102 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=3070847
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
7911 | 2025-12-14 11:28:54 | MASTER-Tunka | (23h 18m 11.56s , +35d 35m 58.5s) | C | 60 | 19.8 |
7912 | 2025-12-14 11:28:54 | MASTER-Tunka | (23h 17m 27.54s , +35d 43m 36.3s) | C | 60 | 19.4 |
7984 | 2025-12-14 11:30:06 | MASTER-Tunka | (22h 59m 36.09s , +35d 37m 15.6s) | C | 60 | 19.8 |
7984 | 2025-12-14 11:30:06 | MASTER-Tunka | (22h 58m 52.22s , +35d 44m 52.1s) | C | 60 | 19.5 |
8057 | 2025-12-14 11:31:19 | MASTER-Tunka | (23h 04m 12.06s , +33d 49m 52.3s) | C | 60 | 19.4 |
8057 | 2025-12-14 11:31:19 | MASTER-Tunka | (23h 04m 54.44s , +33d 42m 21.6s) | C | 60 | 19.8 |
8131 | 2025-12-14 11:32:33 | MASTER-Tunka | (23h 14m 26.42s , +37d 31m 33.7s) | C | 60 | 19.7 |
8131 | 2025-12-14 11:32:33 | MASTER-Tunka | (23h 13m 40.85s , +37d 39m 18.2s) | C | 60 | 19.3 |
8206 | 2025-12-14 11:33:48 | MASTER-Tunka | (22h 55m 29.62s , +37d 30m 10.5s) | C | 60 | 19.5 |
8206 | 2025-12-14 11:33:48 | MASTER-Tunka | (22h 54m 44.15s , +37d 37m 53.0s) | C | 60 | 19.1 |
8284 | 2025-12-14 11:35:06 | MASTER-Tunka | (23h 23m 04.59s , +33d 41m 38.5s) | C | 60 | 19.3 |
8284 | 2025-12-14 11:35:06 | MASTER-Tunka | (23h 22m 22.17s , +33d 49m 10.3s) | C | 60 | 18.9 |
8362 | 2025-12-14 11:36:24 | MASTER-Tunka | (22h 53m 50.59s , +31d 47m 07.2s) | C | 60 | 19.1 |
8362 | 2025-12-14 11:36:24 | MASTER-Tunka | (22h 53m 09.70s , +31d 54m 28.8s) | C | 60 | 18.7 |
8437 | 2025-12-14 11:37:39 | MASTER-Tunka | (23h 11m 37.14s , +31d 48m 53.9s) | C | 60 | 19.1 |
8437 | 2025-12-14 11:37:39 | MASTER-Tunka | (23h 10m 56.14s , +31d 56m 17.6s) | C | 60 | 18.6 |
8512 | 2025-12-14 11:38:54 | MASTER-Tunka | (22h 46m 46.23s , +33d 40m 52.2s) | C | 60 | 19.3 |
8512 | 2025-12-14 11:38:54 | MASTER-Tunka | (22h 46m 03.98s , +33d 48m 19.6s) | C | 60 | 18.8 |
8671 | 2025-12-14 11:41:33 | MASTER-Tunka | (22h 51m 47.69s , +39d 31m 45.6s) | C | 60 | 19.0 |
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