GCN Circular 45544
Subject
EP Alert 260909.53: Global MASTER-Net observations report
Date
2026-09-10T02:27:56Z (5 days 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 (CrAO RAS)
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 260909.53 (trigger No 1788958198,00h 52m 08.28s , +24d 11m 47.0s, R=0.5) errorbox 3078 sec after trigger time at 2026-09-09 13:41:16 UT, with upper limit up to 20.4 mag. The observations began at zenith distance = 63 deg. The sun altitude is -18.5 deg.
The galactic latitude b = -38 deg., longitude l = 124 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=3501645
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
3108 | 2026-09-09 13:41:16 | MASTER-Tunka | (00h 49m 28.30s , +23d 44m 31.4s) | C | 60 | 19.7 |
3108 | 2026-09-09 13:41:16 | MASTER-Tunka | (00h 49m 43.38s , +23d 38m 09.0s) | C | 60 | 14.1 |
3426 | 2026-09-09 13:46:33 | MASTER-Tunka | (00h 49m 32.98s , +23d 42m 55.1s) | C | 60 | 19.9 |
3426 | 2026-09-09 13:46:33 | MASTER-Tunka | (00h 49m 47.59s , +23d 37m 25.4s) | C | 60 | 14.2 |
3498 | 2026-09-09 13:47:46 | MASTER-Tunka | (00h 49m 44.12s , +23d 38m 42.9s) | C | 60 | 14.3 |
3498 | 2026-09-09 13:47:46 | MASTER-Tunka | (00h 49m 29.44s , +23d 44m 12.4s) | C | 60 | 19.9 |
3571 | 2026-09-09 13:48:58 | MASTER-Tunka | (00h 49m 44.15s , +23d 37m 28.6s) | C | 60 | 14.4 |
3571 | 2026-09-09 13:48:58 | MASTER-Tunka | (00h 49m 29.46s , +23d 42m 56.9s) | C | 60 | 19.9 |
3645 | 2026-09-09 13:50:13 | MASTER-Tunka | (00h 49m 31.81s , +23d 44m 15.3s) | C | 60 | 19.9 |
3645 | 2026-09-09 13:50:13 | MASTER-Tunka | (00h 49m 46.50s , +23d 38m 46.5s) | C | 60 | 14.0 |
3720 | 2026-09-09 13:51:27 | MASTER-Tunka | (00h 49m 40.15s , +23d 37m 58.6s) | C | 60 | 14.4 |
3720 | 2026-09-09 13:51:27 | MASTER-Tunka | (00h 49m 25.48s , +23d 43m 28.1s) | C | 60 | 20.0 |
3792 | 2026-09-09 13:52:40 | MASTER-Tunka | (00h 49m 41.34s , +23d 38m 56.7s) | C | 60 | 14.2 |
3792 | 2026-09-09 13:52:40 | MASTER-Tunka | (00h 49m 26.54s , +23d 44m 26.5s) | C | 60 | 20.0 |
3866 | 2026-09-09 13:53:54 | MASTER-Tunka | (00h 49m 47.31s , +23d 37m 55.2s) | C | 60 | 13.9 |
3866 | 2026-09-09 13:53:54 | MASTER-Tunka | (00h 49m 32.53s , +23d 43m 24.4s) | C | 60 | 20.0 |
4106 | 2026-09-09 13:57:53 | MASTER-Tunka | (00h 49m 44.10s , +23d 38m 27.6s) | C | 60 | 14.1 |
4106 | 2026-09-09 13:57:53 | MASTER-Tunka | (00h 49m 29.03s , +23d 43m 56.3s) | C | 60 | 20.0 |
4179 | 2026-09-09 13:59:07 | MASTER-Tunka | (00h 49m 29.05s , +23d 42m 32.9s) | C | 60 | 20.0 |
4179 | 2026-09-09 13:59:07 | MASTER-Tunka | (00h 49m 45.05s , +23d 37m 00.0s) | C | 60 | 15.9 |
4253 | 2026-09-09 14:00:21 | MASTER-Tunka | (00h 49m 47.23s , +23d 38m 23.0s) | C | 60 | 14.2 |
4253 | 2026-09-09 14:00:21 | MASTER-Tunka | (00h 49m 32.06s , +23d 43m 52.0s) | C | 60 | 20.0 |
4334 | 2026-09-09 14:01:41 | MASTER-Tunka | (00h 49m 42.22s , +23d 37m 42.0s) | C | 60 | 13.9 |
4334 | 2026-09-09 14:01:41 | MASTER-Tunka | (00h 49m 26.96s , +23d 43m 11.0s) | C | 60 | 20.0 |
4406 | 2026-09-09 14:02:54 | MASTER-Tunka | (00h 49m 42.25s , +23d 38m 40.2s) | C | 60 | 13.9 |
4406 | 2026-09-09 14:02:54 | MASTER-Tunka | (00h 49m 26.91s , +23d 44m 08.8s) | C | 60 | 20.0 |
4479 | 2026-09-09 14:04:06 | MASTER-Tunka | (00h 49m 47.88s , +23d 37m 37.9s) | C | 60 | 14.1 |
4479 | 2026-09-09 14:04:07 | MASTER-Tunka | (00h 49m 32.48s , +23d 43m 06.8s) | C | 60 | 20.1 |
4552 | 2026-09-09 14:05:20 | MASTER-Tunka | (00h 49m 42.01s , +23d 36m 35.5s) | C | 60 | 14.0 |
4552 | 2026-09-09 14:05:20 | MASTER-Tunka | (00h 49m 26.53s , +23d 42m 04.7s) | C | 60 | 20.1 |
4626 | 2026-09-09 14:06:33 | MASTER-Tunka | (00h 49m 46.43s , +23d 36m 50.4s) | C | 60 | 14.0 |
4626 | 2026-09-09 14:06:33 | MASTER-Tunka | (00h 49m 30.86s , +23d 42m 19.4s) | C | 60 | 20.1 |
4698 | 2026-09-09 14:07:46 | MASTER-Tunka | (00h 49m 44.43s , +23d 38m 18.4s) | C | 60 | 14.1 |
4698 | 2026-09-09 14:07:46 | MASTER-Tunka | (00h 49m 28.77s , +23d 43m 47.0s) | C | 60 | 20.1 |
4944 | 2026-09-09 14:11:52 | MASTER-Tunka | (00h 49m 25.76s , +23d 42m 53.9s) | C | 60 | 20.1 |
5584 | 2026-09-09 14:22:31 | MASTER-Tunka | (00h 49m 42.17s , +23d 38m 09.1s) | C | 60 | 12.9 |
5584 | 2026-09-09 14:22:31 | MASTER-Tunka | (00h 49m 25.06s , +23d 43m 40.5s) | C | 60 | 20.1 |
5656 | 2026-09-09 14:23:43 | MASTER-Tunka | (00h 49m 31.59s , +23d 42m 38.4s) | C | 60 | 20.0 |
5656 | 2026-09-09 14:23:43 | MASTER-Tunka | (00h 49m 48.67s , +23d 37m 06.5s) | C | 60 | 14.0 |
6116 | 2026-09-09 14:31:23 | MASTER-Tunka | (00h 49m 50.74s , +23d 36m 30.1s) | C | 60 | 20.0 |
6176 | 2026-09-09 14:31:23 | MASTER-Tunka | (00h 49m 50.74s , +23d 36m 30.1s) | C | 180 | 20.3 | Coadd
6116 | 2026-09-09 14:31:23 | MASTER-Tunka | (00h 49m 33.25s , +23d 42m 01.3s) | C | 60 | 20.1 |
6176 | 2026-09-09 14:31:23 | MASTER-Tunka | (00h 49m 33.25s , +23d 42m 01.3s) | C | 180 | 20.4 | Coadd
6188 | 2026-09-09 14:32:36 | MASTER-Tunka | (00h 49m 38.24s , +23d 40m 59.4s) | C | 60 | 20.0 |
6188 | 2026-09-09 14:32:36 | MASTER-Tunka | (00h 49m 55.79s , +23d 35m 28.1s) | C | 60 | 20.1 |
6262 | 2026-09-09 14:33:50 | MASTER-Tunka | (00h 49m 32.72s , +23d 39m 57.2s) | C | 60 | 20.1 |
6262 | 2026-09-09 14:33:50 | MASTER-Tunka | (00h 49m 50.35s , +23d 34m 25.9s) | C | 60 | 20.0 |
6335 | 2026-09-09 14:35:02 | MASTER-Tunka | (00h 49m 39.58s , +23d 40m 06.2s) | C | 60 | 20.1 |
6395 | 2026-09-09 14:35:02 | MASTER-Tunka | (00h 49m 39.58s , +23d 40m 06.2s) | C | 180 | 20.4 | Coadd
6335 | 2026-09-09 14:35:03 | MASTER-Tunka | (00h 49m 57.29s , +23d 34m 35.0s) | C | 60 | 20.0 |
6395 | 2026-09-09 14:35:03 | MASTER-Tunka | (00h 49m 57.29s , +23d 34m 35.0s) | C | 180 | 20.4 | Coadd
6409 | 2026-09-09 14:36:17 | MASTER-Tunka | (00h 49m 35.64s , +23d 41m 43.2s) | C | 60 | 20.1 |
6409 | 2026-09-09 14:36:17 | MASTER-Tunka | (00h 49m 53.45s , +23d 36m 12.0s) | C | 60 | 20.1 |
6483 | 2026-09-09 14:37:30 | MASTER-Tunka | (00h 49m 35.60s , +23d 40m 11.3s) | C | 60 | 20.1 |
6483 | 2026-09-09 14:37:30 | MASTER-Tunka | (00h 49m 53.49s , +23d 34m 40.0s) | C | 60 | 20.1 |
6556 | 2026-09-09 14:38:43 | MASTER-Tunka | (00h 49m 38.48s , +23d 41m 44.6s) | C | 60 | 20.1 |
6616 | 2026-09-09 14:38:43 | MASTER-Tunka | (00h 49m 38.48s , +23d 41m 44.6s) | C | 180 | 20.4 | Coadd
6556 | 2026-09-09 14:38:43 | MASTER-Tunka | (00h 49m 56.47s , +23d 36m 13.3s) | C | 60 | 20.1 |
6616 | 2026-09-09 14:38:43 | MASTER-Tunka | (00h 49m 56.47s , +23d 36m 13.3s) | C | 180 | 20.4 | Coadd
6630 | 2026-09-09 14:39:57 | MASTER-Tunka | (00h 49m 32.62s , +23d 40m 46.0s) | C | 60 | 20.1 |
6630 | 2026-09-09 14:39:57 | MASTER-Tunka | (00h 49m 50.70s , +23d 35m 14.6s) | C | 60 | 20.1 |
6702 | 2026-09-09 14:41:10 | MASTER-Tunka | (00h 49m 50.18s , +23d 36m 12.5s) | C | 60 | 20.0 |
6702 | 2026-09-09 14:41:10 | MASTER-Tunka | (00h 49m 32.02s , +23d 41m 43.8s) | C | 60 | 20.0 |
6776 | 2026-09-09 14:42:24 | MASTER-Tunka | (00h 49m 39.41s , +23d 40m 41.5s) | C | 60 | 20.1 |
6836 | 2026-09-09 14:42:24 | MASTER-Tunka | (00h 49m 39.41s , +23d 40m 41.6s) | C | 180 | 20.4 | Coadd
6776 | 2026-09-09 14:42:24 | MASTER-Tunka | (00h 49m 57.65s , +23d 35m 10.3s) | C | 60 | 20.1 |
6836 | 2026-09-09 14:42:24 | MASTER-Tunka | (00h 49m 57.64s , +23d 35m 10.3s) | C | 180 | 20.4 | Coadd
6852 | 2026-09-09 14:43:39 | MASTER-Tunka | (00h 49m 33.18s , +23d 39m 38.9s) | C | 60 | 20.0 |
6852 | 2026-09-09 14:43:39 | MASTER-Tunka | (00h 49m 51.50s , +23d 34m 07.5s) | C | 60 | 20.1 |
6926 | 2026-09-09 14:44:53 | MASTER-Tunka | (00h 49m 39.12s , +23d 39m 41.2s) | C | 60 | 20.1 |
6926 | 2026-09-09 14:44:53 | MASTER-Tunka | (00h 49m 57.53s , +23d 34m 10.0s) | C | 60 | 20.1 |
6999 | 2026-09-09 14:46:07 | MASTER-Tunka | (00h 49m 35.33s , +23d 41m 29.5s) | C | 60 | 20.1 |
7059 | 2026-09-09 14:46:07 | MASTER-Tunka | (00h 49m 35.32s , +23d 41m 29.5s) | C | 180 | 20.4 | Coadd
6999 | 2026-09-09 14:46:07 | MASTER-Tunka | (00h 49m 53.83s , +23d 35m 58.2s) | C | 60 | 20.1 |
7059 | 2026-09-09 14:46:07 | MASTER-Tunka | (00h 49m 53.83s , +23d 35m 58.1s) | C | 180 | 20.4 | Coadd
7071 | 2026-09-09 14:47:19 | MASTER-Tunka | (00h 49m 35.32s , +23d 39m 34.2s) | C | 60 | 20.1 |
7071 | 2026-09-09 14:47:19 | MASTER-Tunka | (00h 49m 53.90s , +23d 34m 02.9s) | C | 60 | 20.1 |
7144 | 2026-09-09 14:48:32 | MASTER-Tunka | (00h 49m 38.59s , +23d 41m 09.0s) | C | 60 | 20.2 |
7144 | 2026-09-09 14:48:32 | MASTER-Tunka | (00h 49m 57.26s , +23d 35m 37.6s) | C | 60 | 20.1 |
7217 | 2026-09-09 14:49:45 | MASTER-Tunka | (00h 49m 32.44s , +23d 40m 27.3s) | C | 60 | 20.1 |
7277 | 2026-09-09 14:49:45 | MASTER-Tunka | (00h 49m 32.44s , +23d 40m 27.2s) | C | 180 | 20.4 | Coadd
7217 | 2026-09-09 14:49:45 | MASTER-Tunka | (00h 49m 51.19s , +23d 34m 55.8s) | C | 60 | 20.1 |
7277 | 2026-09-09 14:49:45 | MASTER-Tunka | (00h 49m 51.19s , +23d 34m 55.7s) | C | 180 | 20.4 | Coadd
7293 | 2026-09-09 14:51:01 | MASTER-Tunka | (00h 49m 33.08s , +23d 41m 25.1s) | C | 60 | 20.2 |
7293 | 2026-09-09 14:51:01 | MASTER-Tunka | (00h 49m 51.92s , +23d 35m 53.7s) | C | 60 | 20.1 |
7366 | 2026-09-09 14:52:14 | MASTER-Tunka | (00h 49m 57.54s , +23d 34m 51.2s) | C | 60 | 20.1 |
7366 | 2026-09-09 14:52:14 | MASTER-Tunka | (00h 49m 38.62s , +23d 40m 22.8s) | C | 60 | 20.1 |
7439 | 2026-09-09 14:53:26 | MASTER-Tunka | (00h 49m 31.98s , +23d 39m 19.9s) | C | 60 | 20.1 |
7499 | 2026-09-09 14:53:26 | MASTER-Tunka | (00h 49m 31.98s , +23d 39m 19.8s) | C | 180 | 20.4 | Coadd
7439 | 2026-09-09 14:53:26 | MASTER-Tunka | (00h 49m 50.97s , +23d 33m 48.2s) | C | 60 | 20.1 |
7499 | 2026-09-09 14:53:26 | MASTER-Tunka | (00h 49m 50.97s , +23d 33m 48.1s) | C | 180 | 20.4 | Coadd
7512 | 2026-09-09 14:54:40 | MASTER-Tunka | (00h 49m 37.53s , +23d 39m 27.3s) | C | 60 | 20.1 |
7512 | 2026-09-09 14:54:40 | MASTER-Tunka | (00h 49m 56.58s , +23d 33m 55.6s) | C | 60 | 20.1 |
7586 | 2026-09-09 14:55:54 | MASTER-Tunka | (00h 49m 35.09s , +23d 41m 10.2s) | C | 60 | 20.1 |
7586 | 2026-09-09 14:55:54 | MASTER-Tunka | (00h 49m 54.22s , +23d 35m 38.5s) | C | 60 | 20.1 |
7661 | 2026-09-09 14:57:08 | MASTER-Tunka | (00h 49m 35.06s , +23d 39m 18.7s) | C | 60 | 20.1 |
7721 | 2026-09-09 14:57:08 | MASTER-Tunka | (00h 49m 35.05s , +23d 39m 18.6s) | C | 180 | 20.4 | Coadd
7661 | 2026-09-09 14:57:08 | MASTER-Tunka | (00h 49m 54.25s , +23d 33m 47.0s) | C | 60 | 20.1 |
7721 | 2026-09-09 14:57:08 | MASTER-Tunka | (00h 49m 54.25s , +23d 33m 47.0s) | C | 180 | 20.4 | Coadd
7734 | 2026-09-09 14:58:21 | MASTER-Tunka | (00h 49m 38.37s , +23d 40m 54.8s) | C | 60 | 20.1 |
7734 | 2026-09-09 14:58:21 | MASTER-Tunka | (00h 49m 57.67s , +23d 35m 23.1s) | C | 60 | 20.1 |
7807 | 2026-09-09 14:59:34 | MASTER-Tunka | (00h 49m 31.53s , +23d 40m 08.2s) | C | 60 | 20.1 |
7807 | 2026-09-09 14:59:34 | MASTER-Tunka | (00h 49m 50.90s , +23d 34m 36.2s) | C | 60 | 20.1 |
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