TITLE: GCN CIRCULAR NUMBER: 40139 SUBJECT: Fermi trigger No 766173972: Global MASTER-Net observations report DATE: 25/04/12 20:01:03 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 GRB250412.75 (trigger No 766173972,23h 19m 21.60s , -81d 40m 12.0s, R=4.38) errorbox 29 sec after notice time and 92 sec after trigger time at 2025-04-12 18:07:39 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 62 deg. The sun altitude is -23.4 deg.
The galactic latitude b = -35 deg., longitude l = 307 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2840903
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
103 | 2025-04-12 18:07:39 | MASTER-SAAO | (00h 46m 29.97s , -81d 52m 11.8s) | C | 20 | 16.4 | 128 | 2025-04-12 18:07:39 | MASTER-SAAO | (00h 46m 29.96s , -81d 52m 11.8s) | C | 70 | 17.5 | Coadd 142 | 2025-04-12 18:08:18 | MASTER-SAAO | (00h 46m 30.73s , -81d 52m 12.6s) | C | 20 | 16.8 | 186 | 2025-04-12 18:08:57 | MASTER-SAAO | (00h 46m 31.35s , -81d 52m 13.6s) | C | 30 | 17.1 | 240 | 2025-04-12 18:09:47 | MASTER-SAAO | (00h 46m 32.24s , -81d 52m 14.8s) | C | 40 | 17.1 | 295 | 2025-04-12 18:09:47 | MASTER-SAAO | (00h 46m 32.21s , -81d 52m 14.8s) | C | 150 | 17.9 | Coadd 304 | 2025-04-12 18:10:46 | MASTER-SAAO | (00h 46m 33.63s , -81d 52m 16.4s) | C | 50 | 17.3 | 378 | 2025-04-12 18:11:55 | MASTER-SAAO | (00h 46m 34.57s , -81d 52m 17.7s) | C | 60 | 17.3 | 468 | 2025-04-12 18:13:24 | MASTER-SAAO | (23h 16m 39.62s , -82d 17m 26.5s) | C | 60 | 16.8 | 635 | 2025-04-12 18:16:12 | MASTER-SAAO | (23h 07m 15.27s , -81d 33m 20.6s) | C | 60 | 16.4 | 695 | 2025-04-12 18:16:12 | MASTER-SAAO | (23h 07m 15.34s , -81d 33m 20.6s) | C | 180 | 17.6 | Coadd 714 | 2025-04-12 18:17:30 | MASTER-SAAO | (23h 07m 15.41s , -81d 33m 15.7s) | C | 60 | 17.1 | 793 | 2025-04-12 18:18:49 | MASTER-SAAO | (23h 07m 15.65s , -81d 33m 12.1s) | C | 60 | 17.0 | 872 | 2025-04-12 18:20:08 | MASTER-SAAO | (23h 07m 16.05s , -81d 33m 09.8s) | C | 60 | 17.0 | 1125 | 2025-04-12 18:24:22 | MASTER-SAAO | (00h 39m 40.29s , -82d 33m 58.2s) | C | 60 | 16.6 | 1449 | 2025-04-12 18:29:45 | MASTER-SAAO | (23h 16m 54.42s , -82d 19m 17.7s) | C | 60 | 16.7 | 1528 | 2025-04-12 18:31:05 | MASTER-SAAO | (22h 15m 53.97s , -82d 17m 25.3s) | C | 60 | 16.5 | 1608 | 2025-04-12 18:32:24 | MASTER-SAAO | (23h 16m 36.44s , -82d 18m 37.3s) | C | 60 | 16.8 | 1687 | 2025-04-12 18:33:44 | MASTER-SAAO | (22h 26m 17.48s , -80d 24m 17.0s) | C | 60 | 16.4 | 1766 | 2025-04-12 18:35:03 | MASTER-SAAO | (23h 14m 57.88s , -80d 23m 02.5s) | C | 60 | 16.5 | 1855 | 2025-04-12 18:36:32 | MASTER-SAAO | (00h 39m 46.51s , -82d 35m 00.3s) | C | 60 | 16.8 | 1945 | 2025-04-12 18:38:01 | MASTER-SAAO | (23h 25m 13.11s , -80d 24m 59.7s) | C | 60 | 16.8 | 2035 | 2025-04-12 18:39:31 | MASTER-SAAO | (00h 31m 31.32s , -80d 40m 19.1s) | C | 60 | 17.1 | 2124 | 2025-04-12 18:41:01 | MASTER-SAAO | (23h 17m 06.68s , -82d 19m 06.9s) | C | 60 | 17.1 | 2203 | 2025-04-12 18:42:20 | MASTER-SAAO | (22h 16m 04.94s , -82d 17m 40.7s) | C | 60 | 17.0 | 2283 | 2025-04-12 18:43:39 | MASTER-SAAO | (23h 16m 43.16s , -82d 18m 06.1s) | C | 60 | 17.4 | 2362 | 2025-04-12 18:44:58 | MASTER-SAAO | (22h 26m 24.24s , -80d 23m 23.1s) | C | 60 | 17.3 | 2441 | 2025-04-12 18:46:18 | MASTER-SAAO | (23h 15m 09.95s , -80d 24m 06.0s) | C | 60 | 17.1 | 2530 | 2025-04-12 18:47:47 | MASTER-SAAO | (00h 39m 50.25s , -82d 36m 27.6s) | C | 60 | 17.2 | 2850 | 2025-04-12 18:53:07 | MASTER-SAAO | (23h 25m 21.81s , -80d 25m 00.7s) | C | 60 | 17.1 | 2939 | 2025-04-12 18:54:36 | MASTER-SAAO | (00h 31m 41.67s , -80d 40m 47.8s) | C | 60 | 17.4 | 3028 | 2025-04-12 18:56:05 | MASTER-SAAO | (23h 17m 19.69s , -82d 19m 05.1s) | C | 60 | 17.4 | 3108 | 2025-04-12 18:57:24 | MASTER-SAAO | (22h 16m 15.77s , -82d 18m 00.3s) | C | 60 | 17.6 | 3187 | 2025-04-12 18:58:44 | MASTER-SAAO | (23h 16m 56.52s , -82d 18m 19.9s) | C | 60 | 17.5 | 3267 | 2025-04-12 19:00:03 | MASTER-SAAO | (22h 26m 34.41s , -80d 23m 41.5s) | C | 60 | 17.5 | 3353 | 2025-04-12 19:01:30 | MASTER-SAAO | (23h 15m 20.80s , -80d 24m 20.0s) | C | 60 | 17.4 | 3442 | 2025-04-12 19:02:58 | MASTER-SAAO | (00h 40m 00.06s , -82d 37m 02.6s) | C | 60 | 17.4 | 3533 | 2025-04-12 19:04:30 | MASTER-SAAO | (23h 25m 31.97s , -80d 24m 57.3s) | C | 60 | 17.3 | 3618 | 2025-04-12 19:05:55 | MASTER-SAAO | (00h 14m 03.61s , -80d 22m 51.5s) | C | 60 | 17.4 | 3698 | 2025-04-12 19:07:14 | MASTER-SAAO | (23h 17m 21.18s , -82d 19m 04.4s) | C | 60 | 17.6 | 3777 | 2025-04-12 19:08:33 | MASTER-SAAO | (22h 16m 17.15s , -82d 17m 59.7s) | C | 60 | 17.6 | 3856 | 2025-04-12 19:09:53 | MASTER-SAAO | (23h 17m 00.72s , -82d 18m 23.9s) | C | 60 | 17.5 | 3936 | 2025-04-12 19:11:12 | MASTER-SAAO | (22h 26m 36.06s , -80d 23m 49.6s) | C | 60 | 17.5 | 4015 | 2025-04-12 19:12:32 | MASTER-SAAO | (23h 15m 23.71s , -80d 24m 25.9s) | C | 60 | 17.3 | 4095 | 2025-04-12 19:13:51 | MASTER-SAAO | (00h 18m 08.69s , -82d 18m 44.5s) | C | 60 | 17.6 | 4174 | 2025-04-12 19:15:10 | MASTER-SAAO | (23h 25m 30.83s , -80d 25m 00.8s) | C | 60 | 17.3 | 4253 | 2025-04-12 19:16:30 | MASTER-SAAO | (00h 14m 09.22s , -80d 22m 57.9s) | C | 60 | 17.4 | 4333 | 2025-04-12 19:17:49 | MASTER-SAAO | (23h 17m 28.05s , -82d 19m 02.7s) | C | 60 | 17.5 | 4415 | 2025-04-12 19:19:11 | MASTER-SAAO | (22h 16m 21.76s , -82d 18m 25.1s) | C | 60 | 17.6 | 4494 | 2025-04-12 19:20:31 | MASTER-SAAO | (23h 17m 07.52s , -82d 18m 31.0s) | C | 60 | 17.6 | 4573 | 2025-04-12 19:21:50 | MASTER-SAAO | (22h 26m 39.76s , -80d 24m 00.5s) | C | 60 | 17.5 | 4653 | 2025-04-12 19:23:09 | MASTER-SAAO | (23h 15m 28.97s , -80d 24m 35.3s) | C | 60 | 17.3 | 4732 | 2025-04-12 19:24:29 | MASTER-SAAO | (00h 18m 16.70s , -82d 18m 49.5s) | C | 60 | 17.4 | 4812 | 2025-04-12 19:25:48 | MASTER-SAAO | (23h 25m 37.20s , -80d 25m 14.8s) | C | 60 | 17.4 | 4891 | 2025-04-12 19:27:08 | MASTER-SAAO | (00h 14m 16.02s , -80d 23m 09.7s) | C | 60 | 17.4 | 4971 | 2025-04-12 19:28:27 | MASTER-SAAO | (22h 01m 08.20s , -84d 12m 36.1s) | C | 60 | 17.6 | 5050 | 2025-04-12 19:29:47 | MASTER-SAAO | (23h 22m 16.17s , -84d 12m 32.8s) | C | 60 | 17.6 | 5130 | 2025-04-12 19:31:06 | MASTER-SAAO | (22h 16m 24.57s , -82d 18m 15.7s) | C | 60 | 17.5 | 5209 | 2025-04-12 19:32:26 | MASTER-SAAO | (23h 17m 23.60s , -82d 18m 43.4s) | C | 60 | 17.5 | 5288 | 2025-04-12 19:33:45 | MASTER-SAAO | (22h 26m 43.56s , -80d 26m 17.1s) | C | 60 | 17.6 | 5368 | 2025-04-12 19:35:04 | MASTER-SAAO | (23h 15m 36.28s , -80d 25m 41.7s) | C | 60 | 17.4 | 5447 | 2025-04-12 19:36:23 | MASTER-SAAO | (23h 25m 44.09s , -80d 23m 58.2s) | C | 60 | 17.5 | 5527 | 2025-04-12 19:37:43 | MASTER-SAAO | (00h 14m 22.67s , -80d 24m 57.2s) | C | 60 | 17.5 | 5606 | 2025-04-12 19:39:02 | MASTER-SAAO | (22h 01m 17.48s , -84d 12m 35.9s) | C | 60 | 17.5 | 5685 | 2025-04-12 19:40:22 | MASTER-SAAO | (23h 22m 28.74s , -84d 12m 43.8s) | C | 60 | 17.6 | 5765 | 2025-04-12 19:41:41 | MASTER-SAAO | (23h 04m 31.91s , -84d 12m 56.7s) | C | 60 | 17.5 | 5844 | 2025-04-12 19:43:01 | MASTER-SAAO | (00h 25m 27.62s , -84d 12m 53.1s) | C | 60 | 17.6 | 5927 | 2025-04-12 19:44:23 | MASTER-SAAO | (22h 35m 02.04s , -78d 30m 48.3s) | C | 60 | 17.5 | 6006 | 2025-04-12 19:45:43 | MASTER-SAAO | (23h 15m 42.29s , -78d 31m 29.4s) | C | 60 | 17.1 | 6085 | 2025-04-12 19:47:02 | MASTER-SAAO | (23h 31m 02.44s , -78d 30m 47.0s) | C | 60 | 17.4 | 6165 | 2025-04-12 19:48:21 | MASTER-SAAO | (00h 11m 40.44s , -78d 29m 09.4s) | C | 60 | 17.4 | 6244 | 2025-04-12 19:49:41 | MASTER-SAAO | (22h 01m 22.34s , -84d 13m 42.0s) | C | 60 | 17.5 | 6324 | 2025-04-12 19:51:00 | MASTER-SAAO | (23h 22m 37.77s , -84d 13m 55.3s) | C | 60 | 17.5 | 6403 | 2025-04-12 19:52:19 | MASTER-SAAO | (23h 04m 40.45s , -84d 13m 39.8s) | C | 60 | 17.4 | 6482 | 2025-04-12 19:53:39 | MASTER-SAAO | (00h 25m 47.79s , -84d 11m 23.9s) | C | 60 | 17.5 | 6561 | 2025-04-12 19:54:58 | MASTER-SAAO | (22h 35m 05.70s , -78d 32m 14.7s) | C | 60 | 17.5 | 6640 | 2025-04-12 19:56:17 | MASTER-SAAO | (23h 15m 51.84s , -78d 30m 39.4s) | C | 60 | 16.6 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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