TITLE: GCN CIRCULAR NUMBER: 43086 SUBJECT: Fermi GRB 251214A: Global MASTER-Net observations report DATE: 25/12/14 00:45:21 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> 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 GRB 251214A ( Fermi GBM team, GCN 43085) errorbox 201 sec after notice time and 238 sec after trigger time at 2025-12-14 00:15:13 UT, with upper limit up to 14.7 mag. Observations started at twilight. The observations began at zenith distance = 44 deg. The sun altitude is -7.0 deg. The galactic latitude b = 52 deg., longitude l = 219 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3070442 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 239 | 2025-12-14 00:15:13 | MASTER-Tunka | (10h 12m 20.99s , +17d 57m 22.4s) | C | 1 | 14.4 | 240 | 2025-12-14 00:15:13 | MASTER-Tunka | (10h 12m 21.00s , +17d 57m 22.4s) | C | 3 | 14.7 | Coadd 239 | 2025-12-14 00:15:13 | MASTER-Tunka | (10h 11m 48.16s , +18d 04m 24.3s) | C | 1 | 14.2 | 245 | 2025-12-14 00:15:18 | MASTER-Tunka | (10h 12m 21.00s , +17d 57m 22.3s) | C | 1 | 14.3 | 245 | 2025-12-14 00:15:18 | MASTER-Tunka | (10h 11m 48.16s , +18d 04m 24.2s) | C | 1 | 14.1 | 250 | 2025-12-14 00:15:24 | MASTER-Tunka | (10h 12m 21.00s , +17d 57m 22.0s) | C | 1 | 14.0 | 250 | 2025-12-14 00:15:24 | MASTER-Tunka | (10h 11m 48.17s , +18d 04m 24.0s) | C | 1 | 14.0 | 256 | 2025-12-14 00:15:30 | MASTER-Tunka | (10h 11m 48.17s , +18d 04m 23.6s) | C | 1 | 13.8 | 256 | 2025-12-14 00:15:30 | MASTER-Tunka | (10h 12m 21.00s , +17d 57m 21.9s) | C | 1 | 14.0 | 257 | 2025-12-14 00:15:30 | MASTER-Tunka | (10h 12m 21.00s , +17d 57m 22.0s) | C | 3 | 14.4 | Coadd 262 | 2025-12-14 00:15:36 | MASTER-Tunka | (10h 12m 21.01s , +17d 57m 21.7s) | C | 1 | 13.9 | 262 | 2025-12-14 00:15:36 | MASTER-Tunka | (10h 11m 48.17s , +18d 04m 23.7s) | C | 1 | 13.8 | 267 | 2025-12-14 00:15:41 | MASTER-Tunka | (10h 11m 48.18s , +18d 04m 23.4s) | C | 1 | 13.8 | 267 | 2025-12-14 00:15:41 | MASTER-Tunka | (10h 12m 21.02s , +17d 57m 21.5s) | C | 1 | 13.9 | 273 | 2025-12-14 00:15:47 | MASTER-Tunka | (10h 12m 21.05s , +17d 57m 21.5s) | C | 1 | 13.9 | 274 | 2025-12-14 00:15:47 | MASTER-Tunka | (10h 12m 21.05s , +17d 57m 21.5s) | C | 3 | 14.4 | Coadd 273 | 2025-12-14 00:15:47 | MASTER-Tunka | (10h 11m 48.20s , +18d 04m 23.3s) | C | 1 | 13.5 | 278 | 2025-12-14 00:15:52 | MASTER-Tunka | (10h 12m 21.04s , +17d 57m 21.1s) | C | 1 | 14.0 | 279 | 2025-12-14 00:15:52 | MASTER-Tunka | (10h 11m 48.20s , +18d 04m 22.9s) | C | 1 | 13.7 | 285 | 2025-12-14 00:15:58 | MASTER-Tunka | (10h 12m 21.05s , +17d 57m 21.1s) | C | 1 | 13.9 | 285 | 2025-12-14 00:15:58 | MASTER-Tunka | (10h 11m 48.23s , +18d 04m 22.8s) | C | 1 | 13.8 | 290 | 2025-12-14 00:16:04 | MASTER-Tunka | (10h 12m 21.06s , +17d 57m 20.6s) | C | 1 | 13.8 | 291 | 2025-12-14 00:16:04 | MASTER-Tunka | (10h 12m 21.06s , +17d 57m 20.6s) | C | 3 | 14.3 | Coadd 291 | 2025-12-14 00:16:04 | MASTER-Tunka | (10h 11m 48.25s , +18d 04m 22.6s) | C | 1 | 13.8 | 296 | 2025-12-14 00:16:09 | MASTER-Tunka | (10h 12m 21.03s , +17d 57m 20.4s) | C | 1 | 13.8 | 296 | 2025-12-14 00:16:09 | MASTER-Tunka | (10h 11m 48.23s , +18d 04m 22.2s) | C | 1 | 13.5 | 302 | 2025-12-14 00:16:15 | MASTER-Tunka | (10h 12m 21.04s , +17d 57m 20.4s) | C | 1 | 13.8 | 302 | 2025-12-14 00:16:15 | MASTER-Tunka | (10h 11m 48.25s , +18d 04m 22.3s) | C | 1 | 13.5 | 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 View this GCN Circular online at https://gcn.nasa.gov/circulars/43086. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...