GCN Circular 46239
Subject
EP Alert 261112.56: Global MASTER-Net observations report
Date
2026-11-12T15:36:27Z (8 hours ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
email
O.Gress, N.Budnev(ISU)
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 (Lomonosov MSU)
D.Buckley (SAAO),
A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)
A.Sosnovskij (Lomonosov MSU)
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory)
L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez,
A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory)
R.Rebolo (The Instituto de Astrofisica de Canarias)
M. Segura, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA)
MASTER-Tunka robotic telescope [1] located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the EP Alert 261112.56 (trigger No 1709322455,04h 03m 49.92s , +25d 46m 51.6s, R=0.0517437) errorbox 90 sec after notice time and 456 sec after trigger time at 2026-11-12 13:30:04 UT, with upper limit up to 18.7 mag. The observations began at zenith distance = 54 deg. The sun altitude is -38.1 deg.
The galactic latitude b = -19 deg., longitude l = 169 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=3532567
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
487 | 2026-11-12 13:30:04 | MASTER-Tunka | (04h 01m 35.00s , +25d 42m 44.1s) | P- | 60 | 18.7 |
487 | 2026-11-12 13:30:04 | MASTER-Tunka | (04h 01m 25.17s , +25d 34m 10.8s) | P| | 60 | 18.6 |
550 | 2026-11-12 13:31:07 | MASTER-Tunka | (04h 01m 34.99s , +25d 42m 41.5s) | P- | 60 | 18.6 |
550 | 2026-11-12 13:31:07 | MASTER-Tunka | (04h 01m 25.23s , +25d 34m 08.4s) | P| | 60 | 18.5 |
613 | 2026-11-12 13:32:11 | MASTER-Tunka | (04h 01m 25.27s , +25d 34m 06.2s) | P| | 60 | 17.5 |
614 | 2026-11-12 13:32:11 | MASTER-Tunka | (04h 01m 34.99s , +25d 42m 39.3s) | P- | 60 | 17.6 |
677 | 2026-11-12 13:33:14 | MASTER-Tunka | (04h 01m 34.97s , +25d 42m 37.5s) | P- | 60 | 16.9 |
677 | 2026-11-12 13:33:14 | MASTER-Tunka | (04h 01m 25.27s , +25d 34m 04.5s) | P| | 60 | 16.8 |
740 | 2026-11-12 13:34:17 | MASTER-Tunka | (04h 01m 35.02s , +25d 42m 34.1s) | P- | 60 | 16.5 |
740 | 2026-11-12 13:34:17 | MASTER-Tunka | (04h 01m 25.35s , +25d 34m 01.2s) | P| | 60 | 16.4 |
804 | 2026-11-12 13:35:21 | MASTER-Tunka | (04h 01m 25.36s , +25d 33m 59.2s) | P| | 60 | 18.0 |
804 | 2026-11-12 13:35:21 | MASTER-Tunka | (04h 01m 35.00s , +25d 42m 32.1s) | P- | 60 | 18.1 |
867 | 2026-11-12 13:36:25 | MASTER-Tunka | (04h 01m 35.02s , +25d 42m 29.8s) | P- | 60 | 18.3 |
867 | 2026-11-12 13:36:25 | MASTER-Tunka | (04h 01m 25.42s , +25d 33m 56.9s) | P| | 60 | 18.2 |
931 | 2026-11-12 13:37:28 | MASTER-Tunka | (04h 01m 25.45s , +25d 33m 54.3s) | P| | 60 | 18.3 |
931 | 2026-11-12 13:37:28 | MASTER-Tunka | (04h 01m 35.00s , +25d 42m 27.2s) | P- | 60 | 18.3 |
995 | 2026-11-12 13:38:32 | MASTER-Tunka | (04h 01m 34.99s , +25d 42m 25.6s) | P- | 60 | 18.3 |
995 | 2026-11-12 13:38:32 | MASTER-Tunka | (04h 01m 25.48s , +25d 33m 52.7s) | P| | 60 | 18.3 |
1058 | 2026-11-12 13:39:36 | MASTER-Tunka | (04h 01m 25.53s , +25d 33m 50.3s) | P| | 60 | 18.6 |
1058 | 2026-11-12 13:39:36 | MASTER-Tunka | (04h 01m 34.99s , +25d 42m 23.2s) | P- | 60 | 18.6 |
1122 | 2026-11-12 13:40:39 | MASTER-Tunka | (04h 01m 34.94s , +25d 42m 21.3s) | P- | 60 | 18.7 |
1122 | 2026-11-12 13:40:39 | MASTER-Tunka | (04h 01m 25.55s , +25d 33m 48.4s) | P| | 60 | 18.6 |
1185 | 2026-11-12 13:41:43 | MASTER-Tunka | (04h 01m 25.60s , +25d 33m 45.9s) | P| | 60 | 18.6 |
1185 | 2026-11-12 13:41:43 | MASTER-Tunka | (04h 01m 34.93s , +25d 42m 18.8s) | P- | 60 | 18.6 |
1249 | 2026-11-12 13:42:46 | MASTER-Tunka | (04h 01m 25.65s , +25d 33m 43.9s) | P| | 60 | 18.6 |
1249 | 2026-11-12 13:42:46 | MASTER-Tunka | (04h 01m 34.92s , +25d 42m 16.9s) | P- | 60 | 18.7 |
1313 | 2026-11-12 13:43:50 | MASTER-Tunka | (04h 01m 25.67s , +25d 33m 41.9s) | P| | 60 | 18.7 |
1313 | 2026-11-12 13:43:50 | MASTER-Tunka | (04h 01m 34.87s , +25d 42m 14.9s) | P- | 60 | 18.7 |
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