[vsnet-grb-info 37076] Fermi GRB 250128B: Global MASTER-Net observations report

TITLE: GCN CIRCULAR NUMBER: 39067 SUBJECT: Fermi GRB 250128B: Global MASTER-Net observations report DATE: 25/01/29 05:30:51 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs lipunov@xray.sai.msu.ru

V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, , D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, 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. 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-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 250128B ( Fermi GBM team, GCN 39057) errorbox 26118 sec after notice time and 26157 sec after trigger time at 2025-01-28 23:38:50 UT, with upper limit up to 18.7 mag. The observations began at zenith distance = 76 deg. The sun altitude is -38.7 deg.

The galactic latitude b = -9 deg., longitude l = 344 deg.

Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2759250

We obtain a following upper limits.

Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________

26187 | 2025-01-28 23:38:50 | MASTER-SAAO | (16h 54m 01.94s , -51d 54m 03.8s) | C | 60 | 14.5 | 26645 | 2025-01-28 23:46:28 | MASTER-SAAO | (17h 07m 34.90s , -48d 08m 01.7s) | C | 60 | 13.5 | 30371 | 2025-01-29 00:48:34 | MASTER-SAAO | (16h 55m 30.58s , -48d 08m 09.4s) | C | 60 | 12.1 | 30450 | 2025-01-29 00:49:53 | MASTER-SAAO | (17h 07m 31.89s , -48d 07m 22.2s) | C | 60 | 12.6 | 30529 | 2025-01-29 00:51:13 | MASTER-SAAO | (17h 25m 40.30s , -46d 15m 46.5s) | C | 60 | 15.9 | 30609 | 2025-01-29 00:52:32 | MASTER-SAAO | (17h 37m 21.80s , -46d 15m 49.3s) | C | 60 | 15.1 | 31804 | 2025-01-29 01:12:28 | MASTER-SAAO | (16h 53m 49.95s , -51d 55m 37.6s) | C | 60 | 15.4 | 31884 | 2025-01-29 01:13:47 | MASTER-SAAO | (16h 55m 31.05s , -48d 09m 30.8s) | C | 60 | 17.2 | 31963 | 2025-01-29 01:15:06 | MASTER-SAAO | (17h 07m 34.80s , -48d 08m 03.8s) | C | 60 | 17.0 | 32243 | 2025-01-29 01:19:46 | MASTER-SAAO | (17h 25m 37.93s , -46d 14m 13.1s) | C | 60 | 14.9 | 32322 | 2025-01-29 01:21:05 | MASTER-SAAO | (17h 37m 19.22s , -46d 15m 27.6s) | C | 60 | 14.3 | 32481 | 2025-01-29 01:23:44 | MASTER-SAAO | (16h 53m 52.00s , -51d 57m 29.7s) | C | 60 | 16.1 | 32560 | 2025-01-29 01:25:03 | MASTER-SAAO | (16h 55m 30.06s , -48d 08m 10.8s) | C | 60 | 17.9 | 32639 | 2025-01-29 01:26:22 | MASTER-SAAO | (17h 07m 30.76s , -48d 09m 30.5s) | C | 60 | 17.6 | 32718 | 2025-01-29 01:27:42 | MASTER-SAAO | (17h 18m 16.31s , -48d 09m 14.3s) | C | 60 | 17.3 | 32798 | 2025-01-29 01:29:01 | MASTER-SAAO | (17h 30m 18.33s , -48d 08m 28.5s) | C | 60 | 17.3 | 32877 | 2025-01-29 01:30:21 | MASTER-SAAO | (17h 25m 43.58s , -46d 15m 26.3s) | C | 60 | 17.5 | 32957 | 2025-01-29 01:31:40 | MASTER-SAAO | (17h 37m 12.35s , -46d 16m 40.3s) | C | 60 | 17.0 | 33115 | 2025-01-29 01:34:19 | MASTER-SAAO | (16h 53m 47.39s , -51d 55m 49.0s) | C | 60 | 16.3 | 33195 | 2025-01-29 01:35:38 | MASTER-SAAO | (16h 55m 28.67s , -48d 09m 42.8s) | C | 60 | 17.3 | 33475 | 2025-01-29 01:40:18 | MASTER-SAAO | (17h 07m 26.19s , -48d 09m 10.5s) | C | 60 | 17.6 | 33554 | 2025-01-29 01:41:37 | MASTER-SAAO | (17h 18m 15.01s , -48d 08m 25.7s) | C | 60 | 16.8 | 33633 | 2025-01-29 01:42:57 | MASTER-SAAO | (17h 30m 20.98s , -48d 09m 41.3s) | C | 60 | 16.5 | 33713 | 2025-01-29 01:44:16 | MASTER-SAAO | (17h 25m 36.21s , -46d 16m 39.3s) | C | 60 | 17.3 | 33792 | 2025-01-29 01:45:35 | MASTER-SAAO | (17h 37m 17.42s , -46d 16m 36.8s) | C | 60 | 17.0 | 33872 | 2025-01-29 01:46:55 | MASTER-SAAO | (16h 55m 27.37s , -48d 08m 29.5s) | C | 60 | 16.3 | 33951 | 2025-01-29 01:48:15 | MASTER-SAAO | (17h 33m 38.21s , -44d 21m 23.3s) | C | 60 | 15.5 | 34031 | 2025-01-29 01:49:34 | MASTER-SAAO | (17h 44m 46.86s , -44d 22m 07.8s) | C | 60 | 15.1 | 34110 | 2025-01-29 01:50:53 | MASTER-SAAO | (17h 07m 25.08s , -48d 08m 18.6s) | C | 60 | 17.1 | 34189 | 2025-01-29 01:52:12 | MASTER-SAAO | (17h 18m 19.31s , -48d 09m 34.6s) | C | 60 | 17.0 | 34268 | 2025-01-29 01:53:32 | MASTER-SAAO | (17h 30m 15.48s , -48d 10m 51.3s) | C | 60 | 17.4 | 34348 | 2025-01-29 01:54:51 | MASTER-SAAO | (17h 25m 39.83s , -46d 16m 26.1s) | C | 60 | 17.5 | 34427 | 2025-01-29 01:56:11 | MASTER-SAAO | (17h 37m 12.76s , -46d 15m 22.7s) | C | 60 | 17.1 | 34706 | 2025-01-29 02:00:49 | MASTER-SAAO | (17h 33m 37.71s , -44d 21m 26.5s) | C | 60 | 17.1 | 34787 | 2025-01-29 02:02:10 | MASTER-SAAO | (17h 44m 44.57s , -44d 22m 19.1s) | C | 60 | 17.0 | 34866 | 2025-01-29 02:03:30 | MASTER-SAAO | (17h 18m 13.41s , -48d 08m 42.4s) | C | 60 | 15.6 | 34946 | 2025-01-29 02:04:49 | MASTER-SAAO | (17h 30m 18.40s , -48d 10m 00.7s) | C | 60 | 16.2 | 35025 | 2025-01-29 02:06:08 | MASTER-SAAO | (17h 25m 33.37s , -46d 16m 57.8s) | C | 60 | 17.2 | 35104 | 2025-01-29 02:07:27 | MASTER-SAAO | (17h 37m 14.58s , -46d 16m 48.0s) | C | 60 | 16.9 | 35184 | 2025-01-29 02:08:47 | MASTER-SAAO | (17h 41m 05.26s , -48d 11m 14.0s) | C | 60 | 17.1 | 35263 | 2025-01-29 02:10:06 | MASTER-SAAO | (17h 53m 10.47s , -48d 09m 56.4s) | C | 60 | 17.0 | 35343 | 2025-01-29 02:11:26 | MASTER-SAAO | (17h 33m 31.26s , -44d 22m 13.5s) | C | 60 | 17.2 | 35422 | 2025-01-29 02:12:45 | MASTER-SAAO | (17h 44m 44.37s , -44d 21m 30.1s) | C | 60 | 16.9 | 35501 | 2025-01-29 02:14:04 | MASTER-SAAO | (17h 18m 16.78s , -48d 09m 51.5s) | C | 60 | 16.8 | 35581 | 2025-01-29 02:15:24 | MASTER-SAAO | (17h 30m 12.42s , -48d 11m 09.5s) | C | 60 | 17.3 | 35660 | 2025-01-29 02:16:43 | MASTER-SAAO | (17h 12m 14.68s , -44d 21m 08.1s) | C | 60 | 16.9 | 35938 | 2025-01-29 02:21:21 | MASTER-SAAO | (17h 23m 30.01s , -44d 21m 27.4s) | C | 60 | 16.5 | 36018 | 2025-01-29 02:22:41 | MASTER-SAAO | (17h 41m 00.34s , -48d 10m 28.6s) | C | 60 | 15.7 | 36097 | 2025-01-29 02:24:00 | MASTER-SAAO | (17h 53m 01.26s , -48d 09m 45.3s) | C | 60 | 16.1 | 36176 | 2025-01-29 02:25:19 | MASTER-SAAO | (17h 33m 35.46s , -44d 22m 23.6s) | C | 60 | 16.2 | 36255 | 2025-01-29 02:26:39 | MASTER-SAAO | (17h 44m 41.67s , -44d 23m 40.6s) | C | 60 | 16.2 | 36335 | 2025-01-29 02:27:58 | MASTER-SAAO | (17h 18m 14.66s , -48d 10m 39.3s) | C | 60 | 17.4 | 36414 | 2025-01-29 02:29:17 | MASTER-SAAO | (17h 30m 13.31s , -48d 09m 35.0s) | C | 60 | 17.2 | 36494 | 2025-01-29 02:30:37 | MASTER-SAAO | (17h 12m 12.99s , -44d 22m 28.4s) | C | 60 | 18.7 | 36573 | 2025-01-29 02:31:56 | MASTER-SAAO | (17h 23m 29.31s , -44d 21m 35.4s) | C | 60 | 17.9 | 36652 | 2025-01-29 02:33:16 | MASTER-SAAO | (17h 40m 59.51s , -48d 10m 37.4s) | C | 60 | 17.5 | 36732 | 2025-01-29 02:34:35 | MASTER-SAAO | (17h 53m 00.41s , -48d 09m 54.9s) | C | 60 | 17.6 | 36890 | 2025-01-29 02:37:14 | MASTER-SAAO | (17h 44m 40.86s , -44d 23m 49.2s) | C | 60 | 16.7 | 37169 | 2025-01-29 02:41:52 | MASTER-SAAO | (17h 12m 11.39s , -44d 21m 00.5s) | C | 60 | 17.1 | 37248 | 2025-01-29 02:43:11 | MASTER-SAAO | (17h 23m 24.33s , -44d 22m 58.5s) | C | 60 | 17.3 | 37327 | 2025-01-29 02:44:31 | MASTER-SAAO | (17h 41m 03.16s , -48d 09m 53.2s) | C | 60 | 17.1 | 37407 | 2025-01-29 02:45:50 | MASTER-SAAO | (17h 52m 57.89s , -48d 11m 03.2s) | C | 60 | 16.6 | 37486 | 2025-01-29 02:47:09 | MASTER-SAAO | (17h 33m 26.22s , -44d 21m 38.3s) | C | 60 | 14.9 | 37566 | 2025-01-29 02:48:29 | MASTER-SAAO | (17h 44m 44.73s , -44d 22m 56.9s) | C | 60 | 12.7 | 37645 | 2025-01-29 02:49:48 | MASTER-SAAO | (17h 47m 35.43s , -46d 17m 56.8s) | C | 60 | 15.6 | 37724 | 2025-01-29 02:51:07 | MASTER-SAAO | (17h 59m 08.69s , -46d 16m 32.3s) | C | 60 | 15.7 | 37803 | 2025-01-29 02:52:27 | MASTER-SAAO | (17h 12m 10.07s , -44d 22m 55.3s) | C | 60 | 13.4 | 37883 | 2025-01-29 02:53:46 | MASTER-SAAO | (17h 23m 26.84s , -44d 21m 42.8s) | C | 60 | 15.3 | 37962 | 2025-01-29 02:55:05 | MASTER-SAAO | (17h 40m 56.50s , -48d 10m 51.8s) | C | 60 | 15.8 | 38041 | 2025-01-29 02:56:24 | MASTER-SAAO | (17h 52m 58.20s , -48d 10m 11.0s) | C | 60 | 15.3 | 38120 | 2025-01-29 02:57:43 | MASTER-SAAO | (17h 35m 05.33s , -50d 05m 41.0s) | C | 60 | 14.7 | 38425 | 2025-01-29 03:02:48 | MASTER-SAAO | (17h 47m 37.45s , -50d 04m 32.0s) | C | 60 | 15.0 | 38662 | 2025-01-29 03:06:45 | MASTER-SAAO | (17h 12m 04.50s , -44d 22m 13.1s) | C | 60 | 16.4 | 38742 | 2025-01-29 03:08:05 | MASTER-SAAO | (17h 23m 18.76s , -44d 21m 34.3s) | C | 60 | 16.0 | 38821 | 2025-01-29 03:09:24 | MASTER-SAAO | (17h 41m 00.17s , -48d 11m 01.1s) | C | 60 | 15.7 | Filter C is a clear (unfiltred) band.

The observation and reduction will continue. The message may be cited.

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