GCN Circular 42753
Subject
LAT GRB251118.86: Global MASTER-Net observations report
Event
Date
2025-11-19T06:11:24Z (3 days 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-OAFA robotic telescope [1] located in Argentina (OAFA observatory of San Juan National University) was pointed to the LAT GRB251118.86 (trigger No 785190695,10h 40m 19.92s , -34d 34m 33.6s, R=0.173833) errorbox 972 sec after notice time and 28422 sec after trigger time at 2025-11-19 04:25:12 UT, with upper limit up to 19.1 mag. The observations began at zenith distance = 83 deg. The sun altitude is -39.6 deg.
The galactic latitude b = 21 deg., longitude l = 275 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=3046739
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
28452 | 2025-11-19 04:25:12 | MASTER-OAFA | (10h 40m 39.45s , -34d 39m 40.3s) | C | 60 | 13.8 |
28518 | 2025-11-19 04:26:18 | MASTER-OAFA | (10h 40m 39.40s , -34d 39m 38.3s) | C | 60 | 14.7 |
28584 | 2025-11-19 04:27:23 | MASTER-OAFA | (10h 40m 39.38s , -34d 39m 35.5s) | C | 60 | 15.0 |
28649 | 2025-11-19 04:28:29 | MASTER-OAFA | (10h 40m 39.39s , -34d 39m 32.7s) | C | 60 | 15.4 |
28715 | 2025-11-19 04:29:35 | MASTER-OAFA | (10h 40m 39.27s , -34d 39m 30.8s) | C | 60 | 15.7 |
28780 | 2025-11-19 04:30:40 | MASTER-OAFA | (10h 40m 39.19s , -34d 39m 28.4s) | C | 60 | 16.1 |
28846 | 2025-11-19 04:31:46 | MASTER-OAFA | (10h 40m 39.06s , -34d 39m 25.8s) | C | 60 | 16.2 |
28913 | 2025-11-19 04:32:52 | MASTER-OAFA | (10h 40m 38.91s , -34d 39m 23.6s) | C | 60 | 16.5 |
28978 | 2025-11-19 04:33:58 | MASTER-OAFA | (10h 40m 38.80s , -34d 39m 21.9s) | C | 60 | 16.5 |
29044 | 2025-11-19 04:35:03 | MASTER-OAFA | (10h 40m 38.68s , -34d 39m 19.9s) | C | 60 | 16.7 |
29110 | 2025-11-19 04:36:10 | MASTER-OAFA | (10h 40m 38.57s , -34d 39m 17.8s) | C | 60 | 17.0 |
29175 | 2025-11-19 04:37:15 | MASTER-OAFA | (10h 40m 38.40s , -34d 39m 16.0s) | C | 60 | 17.1 |
29241 | 2025-11-19 04:38:20 | MASTER-OAFA | (10h 40m 38.33s , -34d 39m 13.9s) | C | 60 | 17.3 |
29307 | 2025-11-19 04:39:26 | MASTER-OAFA | (10h 40m 38.21s , -34d 39m 12.1s) | C | 60 | 17.3 |
29372 | 2025-11-19 04:40:32 | MASTER-OAFA | (10h 40m 38.07s , -34d 39m 10.1s) | C | 60 | 17.3 |
29438 | 2025-11-19 04:41:38 | MASTER-OAFA | (10h 40m 37.93s , -34d 39m 08.0s) | C | 60 | 17.3 |
29504 | 2025-11-19 04:42:44 | MASTER-OAFA | (10h 40m 37.75s , -34d 39m 06.1s) | C | 60 | 17.6 |
29570 | 2025-11-19 04:43:49 | MASTER-OAFA | (10h 40m 37.59s , -34d 39m 04.2s) | C | 60 | 17.6 |
29635 | 2025-11-19 04:44:55 | MASTER-OAFA | (10h 40m 37.45s , -34d 39m 02.1s) | C | 60 | 17.6 |
29701 | 2025-11-19 04:46:01 | MASTER-OAFA | (10h 40m 37.31s , -34d 39m 00.4s) | C | 60 | 17.9 |
29767 | 2025-11-19 04:47:06 | MASTER-OAFA | (10h 40m 37.14s , -34d 38m 58.3s) | C | 60 | 17.9 |
29832 | 2025-11-19 04:48:12 | MASTER-OAFA | (10h 40m 36.96s , -34d 38m 56.4s) | C | 60 | 17.9 |
29899 | 2025-11-19 04:49:18 | MASTER-OAFA | (10h 40m 36.87s , -34d 38m 54.3s) | C | 60 | 17.9 |
29965 | 2025-11-19 04:50:24 | MASTER-OAFA | (10h 40m 36.75s , -34d 38m 52.3s) | C | 60 | 18.0 |
30030 | 2025-11-19 04:51:30 | MASTER-OAFA | (10h 40m 36.61s , -34d 38m 50.3s) | C | 60 | 18.0 |
30096 | 2025-11-19 04:52:36 | MASTER-OAFA | (10h 40m 36.50s , -34d 38m 48.1s) | C | 60 | 18.1 |
30162 | 2025-11-19 04:53:41 | MASTER-OAFA | (10h 40m 36.37s , -34d 38m 46.0s) | C | 60 | 18.2 |
30227 | 2025-11-19 04:54:47 | MASTER-OAFA | (10h 40m 36.23s , -34d 38m 44.6s) | C | 60 | 18.2 |
30293 | 2025-11-19 04:55:53 | MASTER-OAFA | (10h 40m 36.14s , -34d 38m 42.1s) | C | 60 | 18.3 |
30359 | 2025-11-19 04:56:58 | MASTER-OAFA | (10h 40m 36.02s , -34d 38m 40.1s) | C | 60 | 18.3 |
30424 | 2025-11-19 04:58:04 | MASTER-OAFA | (10h 40m 35.89s , -34d 38m 38.1s) | C | 60 | 18.4 |
30491 | 2025-11-19 04:59:10 | MASTER-OAFA | (10h 40m 35.75s , -34d 38m 36.2s) | C | 60 | 18.5 |
30556 | 2025-11-19 05:00:16 | MASTER-OAFA | (10h 40m 35.66s , -34d 38m 33.8s) | C | 60 | 18.5 |
30621 | 2025-11-19 05:01:21 | MASTER-OAFA | (10h 40m 35.53s , -34d 38m 31.4s) | C | 60 | 18.5 |
30687 | 2025-11-19 05:02:27 | MASTER-OAFA | (10h 40m 35.40s , -34d 38m 29.6s) | C | 60 | 18.6 |
30753 | 2025-11-19 05:03:32 | MASTER-OAFA | (10h 40m 35.26s , -34d 38m 27.7s) | C | 60 | 18.6 |
30818 | 2025-11-19 05:04:38 | MASTER-OAFA | (10h 40m 35.17s , -34d 38m 25.6s) | C | 60 | 18.6 |
30885 | 2025-11-19 05:05:44 | MASTER-OAFA | (10h 40m 35.05s , -34d 38m 23.5s) | C | 60 | 18.7 |
30950 | 2025-11-19 05:06:50 | MASTER-OAFA | (10h 40m 34.89s , -34d 38m 21.4s) | C | 60 | 18.7 |
31016 | 2025-11-19 05:07:55 | MASTER-OAFA | (10h 40m 34.75s , -34d 38m 19.4s) | C | 60 | 18.7 |
31082 | 2025-11-19 05:09:02 | MASTER-OAFA | (10h 40m 34.60s , -34d 38m 17.2s) | C | 60 | 18.7 |
31147 | 2025-11-19 05:10:07 | MASTER-OAFA | (10h 40m 34.49s , -34d 38m 15.4s) | C | 60 | 18.8 |
31213 | 2025-11-19 05:11:13 | MASTER-OAFA | (10h 40m 34.36s , -34d 38m 13.2s) | C | 60 | 18.8 |
31279 | 2025-11-19 05:12:19 | MASTER-OAFA | (10h 40m 34.23s , -34d 38m 11.3s) | C | 60 | 18.8 |
31345 | 2025-11-19 05:13:24 | MASTER-OAFA | (10h 40m 34.10s , -34d 38m 09.0s) | C | 60 | 18.8 |
31410 | 2025-11-19 05:14:30 | MASTER-OAFA | (10h 40m 33.98s , -34d 38m 07.1s) | C | 60 | 18.9 |
31476 | 2025-11-19 05:15:36 | MASTER-OAFA | (10h 40m 33.86s , -34d 38m 04.6s) | C | 60 | 18.9 |
31542 | 2025-11-19 05:16:41 | MASTER-OAFA | (10h 40m 33.76s , -34d 38m 02.4s) | C | 60 | 18.9 |
31607 | 2025-11-19 05:17:47 | MASTER-OAFA | (10h 40m 33.66s , -34d 38m 00.3s) | C | 60 | 18.9 |
31673 | 2025-11-19 05:18:52 | MASTER-OAFA | (10h 40m 33.53s , -34d 37m 58.3s) | C | 60 | 18.9 |
31738 | 2025-11-19 05:19:58 | MASTER-OAFA | (10h 40m 33.38s , -34d 37m 56.0s) | C | 60 | 18.9 |
31804 | 2025-11-19 05:21:03 | MASTER-OAFA | (10h 40m 33.26s , -34d 37m 53.7s) | C | 60 | 18.9 |
31870 | 2025-11-19 05:22:10 | MASTER-OAFA | (10h 40m 33.13s , -34d 37m 51.8s) | C | 60 | 18.9 |
31936 | 2025-11-19 05:23:16 | MASTER-OAFA | (10h 40m 33.01s , -34d 37m 49.6s) | C | 60 | 18.9 |
32002 | 2025-11-19 05:24:21 | MASTER-OAFA | (10h 40m 32.90s , -34d 37m 47.5s) | C | 60 | 18.9 |
32068 | 2025-11-19 05:25:27 | MASTER-OAFA | (10h 40m 32.77s , -34d 37m 45.1s) | C | 60 | 19.0 |
32133 | 2025-11-19 05:26:33 | MASTER-OAFA | (10h 40m 32.64s , -34d 37m 42.8s) | C | 60 | 18.9 |
32198 | 2025-11-19 05:27:38 | MASTER-OAFA | (10h 40m 32.50s , -34d 37m 40.9s) | C | 60 | 18.9 |
32265 | 2025-11-19 05:28:44 | MASTER-OAFA | (10h 40m 32.41s , -34d 37m 38.8s) | C | 60 | 18.9 |
32330 | 2025-11-19 05:29:50 | MASTER-OAFA | (10h 40m 32.29s , -34d 37m 36.8s) | C | 60 | 19.0 |
32396 | 2025-11-19 05:30:55 | MASTER-OAFA | (10h 40m 32.17s , -34d 37m 34.7s) | C | 60 | 19.0 |
32462 | 2025-11-19 05:32:01 | MASTER-OAFA | (10h 40m 32.05s , -34d 37m 32.6s) | C | 60 | 19.0 |
32527 | 2025-11-19 05:33:07 | MASTER-OAFA | (10h 40m 31.94s , -34d 37m 30.3s) | C | 60 | 19.0 |
32592 | 2025-11-19 05:34:12 | MASTER-OAFA | (10h 40m 31.81s , -34d 37m 28.3s) | C | 60 | 19.0 |
32659 | 2025-11-19 05:35:18 | MASTER-OAFA | (10h 40m 31.72s , -34d 37m 26.0s) | C | 60 | 19.0 |
32724 | 2025-11-19 05:36:24 | MASTER-OAFA | (10h 40m 31.62s , -34d 37m 24.0s) | C | 60 | 19.0 |
32790 | 2025-11-19 05:37:29 | MASTER-OAFA | (10h 40m 31.49s , -34d 37m 22.0s) | C | 60 | 19.0 |
32856 | 2025-11-19 05:38:36 | MASTER-OAFA | (10h 40m 31.39s , -34d 37m 19.8s) | C | 60 | 19.0 |
32922 | 2025-11-19 05:39:41 | MASTER-OAFA | (10h 40m 31.28s , -34d 37m 17.6s) | C | 60 | 19.0 |
32987 | 2025-11-19 05:40:47 | MASTER-OAFA | (10h 40m 31.23s , -34d 37m 15.6s) | C | 60 | 19.0 |
33053 | 2025-11-19 05:41:53 | MASTER-OAFA | (10h 40m 31.08s , -34d 37m 13.4s) | C | 60 | 19.1 |
33118 | 2025-11-19 05:42:58 | MASTER-OAFA | (10h 40m 31.04s , -34d 37m 11.1s) | C | 60 | 19.0 |
33184 | 2025-11-19 05:44:03 | MASTER-OAFA | (10h 40m 30.92s , -34d 37m 09.5s) | C | 60 | 19.0 |
33250 | 2025-11-19 05:45:10 | MASTER-OAFA | (10h 40m 30.85s , -34d 37m 07.0s) | C | 60 | 19.0 |
33316 | 2025-11-19 05:46:15 | MASTER-OAFA | (10h 40m 30.75s , -34d 37m 05.0s) | C | 60 | 19.0 |
33381 | 2025-11-19 05:47:21 | MASTER-OAFA | (10h 40m 30.69s , -34d 37m 03.0s) | C | 60 | 19.0 |
33448 | 2025-11-19 05:48:28 | MASTER-OAFA | (10h 40m 30.59s , -34d 37m 00.4s) | C | 60 | 19.1 |
33513 | 2025-11-19 05:49:33 | MASTER-OAFA | (10h 40m 30.50s , -34d 36m 58.5s) | C | 60 | 19.0 |
33579 | 2025-11-19 05:50:38 | MASTER-OAFA | (10h 40m 30.45s , -34d 36m 56.3s) | C | 60 | 19.1 |
33645 | 2025-11-19 05:51:44 | MASTER-OAFA | (10h 40m 30.39s , -34d 36m 54.0s) | C | 60 | 19.0 |
33710 | 2025-11-19 05:52:50 | MASTER-OAFA | (10h 40m 30.29s , -34d 36m 51.8s) | C | 60 | 19.0 |
33776 | 2025-11-19 05:53:56 | MASTER-OAFA | (10h 40m 30.20s , -34d 36m 50.0s) | C | 60 | 19.0 |
33842 | 2025-11-19 05:55:02 | MASTER-OAFA | (10h 40m 30.14s , -34d 36m 47.5s) | C | 60 | 19.0 |
33908 | 2025-11-19 05:56:08 | MASTER-OAFA | (10h 40m 30.05s , -34d 36m 45.1s) | C | 60 | 19.1 |
33973 | 2025-11-19 05:57:13 | MASTER-OAFA | (10h 40m 29.97s , -34d 36m 43.0s) | C | 60 | 19.0 |
34039 | 2025-11-19 05:58:19 | MASTER-OAFA | (10h 40m 29.87s , -34d 36m 40.9s) | C | 60 | 19.0 |
34104 | 2025-11-19 05:59:24 | MASTER-OAFA | (10h 40m 29.79s , -34d 36m 38.4s) | C | 60 | 19.0 |
34169 | 2025-11-19 06:00:29 | MASTER-OAFA | (10h 40m 29.72s , -34d 36m 36.7s) | C | 60 | 19.0 |
34236 | 2025-11-19 06:01:35 | MASTER-OAFA | (10h 40m 29.62s , -34d 36m 34.4s) | C | 60 | 19.0 |
34302 | 2025-11-19 06:02:41 | MASTER-OAFA | (10h 40m 29.57s , -34d 36m 32.4s) | C | 60 | 19.0 |
34367 | 2025-11-19 06:03:47 | MASTER-OAFA | (10h 40m 29.51s , -34d 36m 29.9s) | C | 60 | 19.0 |
34433 | 2025-11-19 06:04:53 | MASTER-OAFA | (10h 40m 29.42s , -34d 36m 27.6s) | C | 60 | 19.0 |
34499 | 2025-11-19 06:05:58 | MASTER-OAFA | (10h 40m 29.36s , -34d 36m 25.3s) | 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