[vsnet-grb-info 37626] Fermi trigger No 762963055: Global MASTER-Net observations report

TITLE: GCN CIRCULAR NUMBER: 39610 SUBJECT: Fermi trigger No 762963055: Global MASTER-Net observations report DATE: 25/03/07 03:31:23 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 GRB250306.59 (trigger No 762963055,06h 29m 04.08s , -54d 04m 58.8s, R=50) errorbox 19549 sec after notice time and 19583 sec after trigger time at 2025-03-06 19:37:13 UT, with upper limit up to 19.3 mag. The observations began at zenith distance = 44 deg. The sun altitude is -30.8 deg.

MASTER-OAFA robotic telescope located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB250306.59 errorbox 35961 sec after notice time and 35994 sec after trigger time at 2025-03-07 00:10:45 UT, with upper limit up to 20.7 mag. Observations started at twilight. The observations began at zenith distance = 6 deg. The sun altitude is -15.1 deg.

The galactic latitude b = -25 deg., longitude l = 263 deg.

Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2802407

We obtain a following upper limits.

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

19613 | 2025-03-06 19:37:13 | MASTER-SAAO | (04h 20m 33.85s , -55d 04m 29.3s) | C | 60 | 17.8 | 19692 | 2025-03-06 19:38:32 | MASTER-SAAO | (04h 20m 41.18s , -55d 05m 26.6s) | B | 60 | 17.9 | 19942 | 2025-03-06 19:42:42 | MASTER-SAAO | (07h 23m 40.55s , -50d 13m 46.6s) | C | 60 | 18.8 | 20021 | 2025-03-06 19:44:01 | MASTER-SAAO | (07h 35m 57.04s , -50d 14m 19.6s) | C | 60 | 18.7 | 20101 | 2025-03-06 19:45:21 | MASTER-SAAO | (06h 59m 31.94s , -57d 50m 20.3s) | C | 60 | 19.1 | 20180 | 2025-03-06 19:46:40 | MASTER-SAAO | (07h 14m 17.76s , -57d 51m 12.6s) | C | 60 | 18.9 | 20259 | 2025-03-06 19:47:59 | MASTER-SAAO | (06h 53m 09.68s , -59d 43m 41.7s) | C | 60 | 19.3 | 20339 | 2025-03-06 19:49:19 | MASTER-SAAO | (07h 08m 50.79s , -59d 44m 59.4s) | C | 60 | 19.1 | 20418 | 2025-03-06 19:50:38 | MASTER-SAAO | (06h 38m 47.19s , -55d 56m 27.1s) | C | 60 | 18.9 | 20497 | 2025-03-06 19:51:57 | MASTER-SAAO | (06h 52m 56.67s , -55d 55m 18.5s) | C | 60 | 18.9 | 20576 | 2025-03-06 19:53:17 | MASTER-SAAO | (04h 20m 40.87s , -55d 05m 06.1s) | C | 60 | 17.4 | 20855 | 2025-03-06 19:57:55 | MASTER-SAAO | (04h 20m 41.15s , -55d 05m 19.8s) | B | 60 | 17.8 | 21511 | 2025-03-06 20:08:52 | MASTER-SAAO | (07h 23m 44.10s , -50d 12m 41.1s) | C | 60 | 18.9 | 21591 | 2025-03-06 20:10:11 | MASTER-SAAO | (07h 36m 14.00s , -50d 13m 36.1s) | C | 60 | 18.7 | 21671 | 2025-03-06 20:11:31 | MASTER-SAAO | (06h 59m 37.99s , -57d 50m 34.1s) | C | 60 | 19.1 | 21750 | 2025-03-06 20:12:50 | MASTER-SAAO | (07h 14m 35.51s , -57d 50m 12.8s) | C | 60 | 19.0 | 21829 | 2025-03-06 20:14:10 | MASTER-SAAO | (06h 53m 20.12s , -59d 42m 57.5s) | C | 60 | 19.2 | 22516 | 2025-03-06 20:25:36 | MASTER-SAAO | (07h 09m 03.43s , -59d 41m 59.2s) | C | 60 | 19.1 | 22595 | 2025-03-06 20:26:55 | MASTER-SAAO | (06h 39m 05.00s , -55d 55m 13.9s) | C | 60 | 19.0 | 22675 | 2025-03-06 20:28:15 | MASTER-SAAO | (06h 53m 08.87s , -55d 56m 07.8s) | C | 60 | 19.0 | 23012 | 2025-03-06 20:33:52 | MASTER-SAAO | (07h 23m 52.89s , -50d 13m 01.7s) | C | 60 | 18.9 | 23091 | 2025-03-06 20:35:11 | MASTER-SAAO | (07h 36m 17.11s , -50d 11m 56.0s) | C | 60 | 18.8 | 23171 | 2025-03-06 20:36:31 | MASTER-SAAO | (06h 59m 51.87s , -57d 48m 49.5s) | C | 60 | 19.1 | 23250 | 2025-03-06 20:37:50 | MASTER-SAAO | (07h 14m 37.85s , -57d 49m 43.0s) | C | 60 | 18.9 | 23329 | 2025-03-06 20:39:09 | MASTER-SAAO | (06h 53m 30.83s , -59d 43m 41.5s) | C | 60 | 19.2 | 23583 | 2025-03-06 20:43:24 | MASTER-SAAO | (07h 09m 06.81s , -59d 42m 35.4s) | C | 60 | 19.1 | 23663 | 2025-03-06 20:44:43 | MASTER-SAAO | (06h 39m 02.04s , -55d 53m 45.9s) | C | 60 | 18.9 | 23742 | 2025-03-06 20:46:02 | MASTER-SAAO | (06h 53m 18.74s , -55d 54m 38.5s) | C | 60 | 18.9 | 24154 | 2025-03-06 20:52:54 | MASTER-SAAO | (07h 24m 04.89s , -50d 11m 37.4s) | C | 60 | 18.9 | 24233 | 2025-03-06 20:54:14 | MASTER-SAAO | (07h 36m 22.74s , -50d 12m 22.2s) | C | 60 | 18.8 | 24313 | 2025-03-06 20:55:33 | MASTER-SAAO | (06h 59m 48.96s , -57d 47m 13.8s) | C | 60 | 19.0 | 24392 | 2025-03-06 20:56:52 | MASTER-SAAO | (07h 14m 48.32s , -57d 48m 07.9s) | C | 60 | 18.9 | 24471 | 2025-03-06 20:58:12 | MASTER-SAAO | (06h 53m 27.53s , -59d 43m 09.8s) | C | 60 | 19.3 | 24724 | 2025-03-06 21:02:24 | MASTER-SAAO | (07h 09m 15.67s , -59d 42m 55.8s) | C | 60 | 19.2 | 24804 | 2025-03-06 21:03:44 | MASTER-SAAO | (06h 39m 12.98s , -55d 53m 12.3s) | C | 60 | 18.9 | 24883 | 2025-03-06 21:05:03 | MASTER-SAAO | (06h 53m 17.91s , -55d 54m 02.0s) | C | 60 | 19.0 | 25374 | 2025-03-06 21:13:14 | MASTER-SAAO | (07h 24m 10.09s , -50d 10m 53.7s) | C | 60 | 18.8 | 25453 | 2025-03-06 21:14:33 | MASTER-SAAO | (07h 36m 29.33s , -50d 11m 44.1s) | C | 60 | 18.7 | 25532 | 2025-03-06 21:15:52 | MASTER-SAAO | (06h 59m 55.42s , -57d 46m 33.9s) | C | 60 | 18.9 | 25611 | 2025-03-06 21:17:12 | MASTER-SAAO | (07h 14m 54.90s , -57d 47m 28.2s) | C | 60 | 18.8 | 25691 | 2025-03-06 21:18:31 | MASTER-SAAO | (06h 53m 33.13s , -59d 42m 29.2s) | C | 60 | 19.1 | 26024 | 2025-03-06 21:24:04 | MASTER-SAAO | (07h 09m 24.68s , -59d 40m 41.5s) | C | 60 | 19.1 | 26103 | 2025-03-06 21:25:24 | MASTER-SAAO | (06h 39m 10.31s , -55d 53m 24.4s) | C | 60 | 19.0 | 26183 | 2025-03-06 21:26:43 | MASTER-SAAO | (06h 53m 20.72s , -55d 52m 17.4s) | C | 60 | 18.5 | 26681 | 2025-03-06 21:35:01 | MASTER-SAAO | (07h 24m 19.80s , -50d 10m 26.5s) | C | 60 | 17.3 | 26761 | 2025-03-06 21:36:21 | MASTER-SAAO | (07h 36m 38.64s , -50d 11m 15.0s) | C | 60 | 17.4 | 26840 | 2025-03-06 21:37:40 | MASTER-SAAO | (07h 00m 03.51s , -57d 46m 05.9s) | C | 60 | 17.6 | 26919 | 2025-03-06 21:38:59 | MASTER-SAAO | (07h 15m 04.43s , -57d 46m 59.8s) | C | 60 | 16.8 | 26999 | 2025-03-06 21:40:19 | MASTER-SAAO | (06h 53m 40.23s , -59d 42m 01.2s) | C | 60 | 17.6 | 27330 | 2025-03-06 21:45:50 | MASTER-SAAO | (07h 09m 30.05s , -59d 40m 08.9s) | C | 60 | 19.1 | 27409 | 2025-03-06 21:47:09 | MASTER-SAAO | (06h 39m 13.36s , -55d 52m 47.5s) | C | 60 | 18.9 | 27488 | 2025-03-06 21:48:28 | MASTER-SAAO | (06h 53m 25.38s , -55d 51m 40.4s) | C | 60 | 19.1 | 36055 | 2025-03-07 00:10:45 | MASTER-OAFA | (06h 39m 01.49s , -36d 27m 29.2s) | C | 120 | 20.0 | 36175 | 2025-03-07 00:10:45 | MASTER-OAFA | (06h 39m 01.49s , -36d 27m 29.2s) | C | 360 | 20.5 | Coadd 36492 | 2025-03-07 00:18:13 | MASTER-OAFA | (06h 50m 23.77s , -36d 05m 00.8s) | C | 100 | 18.4 | 36592 | 2025-03-07 00:18:13 | MASTER-OAFA | (06h 50m 23.77s , -36d 05m 00.8s) | C | 300 | 19.1 | Coadd 36503 | 2025-03-07 00:18:13 | MASTER-OAFA | (06h 39m 02.29s , -36d 26m 20.3s) | C | 120 | 19.9 | 36626 | 2025-03-07 00:20:26 | MASTER-OAFA | (06h 50m 31.45s , -36d 05m 57.5s) | C | 100 | 18.5 | 36636 | 2025-03-07 00:20:27 | MASTER-OAFA | (06h 39m 09.85s , -36d 27m 17.1s) | C | 120 | 20.1 | 36763 | 2025-03-07 00:22:43 | MASTER-OAFA | (06h 50m 26.25s , -36d 06m 54.0s) | C | 100 | 18.5 | 36773 | 2025-03-07 00:22:44 | MASTER-OAFA | (06h 39m 04.58s , -36d 28m 13.9s) | C | 120 | 20.0 | 36893 | 2025-03-07 00:22:44 | MASTER-OAFA | (06h 39m 04.58s , -36d 28m 13.9s) | C | 360 | 20.6 | Coadd 36899 | 2025-03-07 00:24:59 | MASTER-OAFA | (06h 50m 31.50s , -36d 06m 22.8s) | C | 100 | 18.5 | 36909 | 2025-03-07 00:25:00 | MASTER-OAFA | (06h 39m 09.97s , -36d 27m 43.2s) | C | 120 | 20.1 | 37253 | 2025-03-07 00:30:54 | MASTER-OAFA | (06h 50m 28.93s , -36d 06m 37.9s) | C | 100 | 18.5 | 37264 | 2025-03-07 00:30:54 | MASTER-OAFA | (06h 39m 07.66s , -36d 28m 03.4s) | C | 120 | 20.0 | 37674 | 2025-03-07 00:38:24 | MASTER-OAFA | (03h 08m 25.09s , -30d 36m 24.1s) | C | 40 | 18.0 | 37714 | 2025-03-07 00:38:24 | MASTER-OAFA | (03h 08m 25.09s , -30d 36m 24.0s) | C | 120 | 18.9 | Coadd 37684 | 2025-03-07 00:38:24 | MASTER-OAFA | (02h 57m 52.08s , -30d 57m 32.7s) | C | 60 | 20.0 | 37744 | 2025-03-07 00:38:24 | MASTER-OAFA | (02h 57m 52.07s , -30d 57m 32.8s) | C | 180 | 20.6 | Coadd 37854 | 2025-03-07 00:41:24 | MASTER-OAFA | (02h 47m 43.33s , -45d 51m 10.7s) | C | 40 | 18.1 | 37894 | 2025-03-07 00:41:24 | MASTER-OAFA | (02h 47m 43.32s , -45d 51m 10.6s) | C | 120 | 18.8 | Coadd 37864 | 2025-03-07 00:41:24 | MASTER-OAFA | (02h 34m 39.52s , -46d 11m 20.6s) | C | 60 | 20.0 | 37924 | 2025-03-07 00:41:24 | MASTER-OAFA | (02h 34m 39.52s , -46d 11m 20.6s) | C | 180 | 20.7 | Coadd 38489 | 2025-03-07 00:51:59 | MASTER-OAFA | (03h 08m 20.31s , -30d 35m 34.4s) | C | 40 | 18.0 | 38499 | 2025-03-07 00:51:59 | MASTER-OAFA | (02h 57m 47.83s , -30d 56m 40.0s) | C | 60 | 19.7 | 38567 | 2025-03-07 00:53:18 | MASTER-OAFA | (02h 47m 44.07s , -45d 50m 28.4s) | C | 40 | 18.1 | 38578 | 2025-03-07 00:53:18 | MASTER-OAFA | (02h 34m 40.86s , -46d 10m 33.0s) | C | 60 | 19.9 | 39176 | 2025-03-07 01:03:27 | MASTER-OAFA | (03h 08m 26.89s , -30d 36m 25.0s) | C | 40 | 18.0 | 39187 | 2025-03-07 01:03:27 | MASTER-OAFA | (02h 57m 54.21s , -30d 57m 33.5s) | C | 60 | 19.9 | 39256 | 2025-03-07 01:04:46 | MASTER-OAFA | (02h 47m 39.18s , -45d 50m 51.5s) | C | 40 | 17.9 | 39266 | 2025-03-07 01:04:47 | MASTER-OAFA | (02h 34m 35.84s , -46d 10m 58.8s) | C | 60 | 20.1 | 39769 | 2025-03-07 01:13:19 | MASTER-OAFA | (03h 08m 27.01s , -30d 37m 51.1s) | C | 40 | 18.0 | 39809 | 2025-03-07 01:13:19 | MASTER-OAFA | (03h 08m 27.01s , -30d 37m 51.0s) | C | 120 | 18.7 | Coadd 39779 | 2025-03-07 01:13:19 | MASTER-OAFA | (02h 57m 54.90s , -30d 58m 54.2s) | C | 60 | 19.7 | 39839 | 2025-03-07 01:13:19 | MASTER-OAFA | (02h 57m 54.90s , -30d 58m 54.2s) | C | 180 | 20.4 | Coadd 40225 | 2025-03-07 01:20:55 | MASTER-OAFA | (02h 47m 38.97s , -45d 50m 05.2s) | C | 40 | 17.9 | 40235 | 2025-03-07 01:20:55 | MASTER-OAFA | (02h 34m 36.00s , -46d 10m 14.5s) | C | 60 | 20.1 | 40574 | 2025-03-07 01:26:45 | MASTER-OAFA | (03h 08m 27.40s , -30d 38m 14.0s) | C | 40 | 17.7 | 40585 | 2025-03-07 01:26:45 | MASTER-OAFA | (02h 57m 55.08s , -30d 59m 20.9s) | C | 60 | 19.6 | 41242 | 2025-03-07 01:37:42 | MASTER-OAFA | (02h 34m 44.51s , -46d 11m 34.8s) | C | 60 | 19.1 | 41646 | 2025-03-07 01:44:36 | MASTER-OAFA | (03h 08m 24.70s , -30d 38m 19.6s) | C | 40 | 17.9 | 41656 | 2025-03-07 01:44:37 | MASTER-OAFA | (02h 57m 52.88s , -30d 59m 23.8s) | C | 60 | 19.3 | 41875 | 2025-03-07 01:48:25 | MASTER-OAFA | (02h 47m 42.83s , -45d 51m 36.8s) | C | 40 | 17.9 | 41885 | 2025-03-07 01:48:25 | MASTER-OAFA | (02h 34m 40.19s , -46d 11m 44.0s) | C | 60 | 19.6 | 47204 | 2025-03-07 03:17:15 | MASTER-OAFA | (12h 16m 47.66s , -65d 25m 24.4s) | C | 40 | 16.7 | Filter C is a clear (unfiltred) band.

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

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