[vsnet-grb-info 38457] Fermi GRB 250510C: Global MASTER-Net observations report

TITLE: GCN CIRCULAR NUMBER: 40426 SUBJECT: Fermi GRB 250510C: Global MASTER-Net observations report DATE: 25/05/11 01:32:21 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs lipunov@xray.sai.msu.ru

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, 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.Sosnovskij (CrAO), 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-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 250510C ( Fermi GBM team, GCN 40424) errorbox 2642 sec after notice time and 2680 sec after trigger time at 2025-05-10 22:57:20 UT, with upper limit up to 19.5 mag. Observations started at twilight. The observations began at zenith distance = 41 deg. The sun altitude is -14.5 deg.

The galactic latitude b = 29 deg., longitude l = 212 deg.

Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2867339

We obtain a following upper limits.

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

2700 | 2025-05-10 22:57:20 | MASTER-OAFA | (09h 07m 31.64s , +09d 29m 09.5s) | C | 40 | 17.4 | 2710 | 2025-05-10 22:57:20 | MASTER-OAFA | (08h 58m 15.88s , +09d 06m 34.4s) | C | 60 | 19.3 | 2778 | 2025-05-10 22:58:38 | MASTER-OAFA | (09h 05m 01.80s , +07d 33m 46.8s) | C | 40 | 17.7 | 2788 | 2025-05-10 22:58:38 | MASTER-OAFA | (08h 55m 48.52s , +07d 11m 15.2s) | C | 60 | 19.4 | 2857 | 2025-05-10 22:59:56 | MASTER-OAFA | (08h 47m 55.47s , +05d 41m 08.9s) | C | 40 | 17.5 | 2867 | 2025-05-10 22:59:57 | MASTER-OAFA | (08h 38m 44.26s , +05d 18m 40.5s) | C | 60 | 19.1 | 2940 | 2025-05-10 23:01:20 | MASTER-OAFA | (09h 03m 07.27s , +05d 40m 38.9s) | C | 40 | 17.5 | 2951 | 2025-05-10 23:01:20 | MASTER-OAFA | (08h 53m 55.86s , +05d 18m 11.4s) | C | 60 | 19.2 | 3020 | 2025-05-10 23:02:40 | MASTER-OAFA | (09h 20m 18.53s , +07d 35m 47.0s) | C | 40 | 17.6 | 3030 | 2025-05-10 23:02:40 | MASTER-OAFA | (09h 11m 04.97s , +07d 13m 14.9s) | C | 60 | 19.3 | 3100 | 2025-05-10 23:03:59 | MASTER-OAFA | (08h 46m 42.34s , +03d 46m 36.1s) | C | 40 | 17.5 | 3110 | 2025-05-10 23:04:00 | MASTER-OAFA | (08h 37m 32.42s , +03d 24m 11.6s) | C | 60 | 19.1 | 3179 | 2025-05-10 23:05:18 | MASTER-OAFA | (09h 22m 52.75s , +09d 27m 55.7s) | C | 40 | 17.7 | 3189 | 2025-05-10 23:05:19 | MASTER-OAFA | (09h 13m 36.67s , +09d 05m 18.5s) | C | 60 | 19.3 | 3258 | 2025-05-10 23:06:38 | MASTER-OAFA | (09h 01m 57.14s , +03d 45m 59.4s) | C | 40 | 17.5 | 3268 | 2025-05-10 23:06:38 | MASTER-OAFA | (08h 52m 46.93s , +03d 23m 35.1s) | C | 60 | 19.2 | 3337 | 2025-05-10 23:07:57 | MASTER-OAFA | (09h 07m 31.37s , +09d 29m 55.9s) | C | 40 | 17.7 | 3347 | 2025-05-10 23:07:57 | MASTER-OAFA | (08h 58m 15.39s , +09d 07m 18.0s) | C | 60 | 19.4 | 3413 | 2025-05-10 23:09:13 | MASTER-OAFA | (09h 05m 01.60s , +07d 34m 02.9s) | C | 40 | 17.9 | 3424 | 2025-05-10 23:09:13 | MASTER-OAFA | (08h 55m 48.24s , +07d 11m 29.4s) | C | 60 | 19.4 | 3591 | 2025-05-10 23:12:10 | MASTER-OAFA | (08h 47m 50.34s , +05d 40m 45.5s) | C | 40 | 17.4 | 3601 | 2025-05-10 23:12:11 | MASTER-OAFA | (08h 38m 39.27s , +05d 18m 17.8s) | C | 60 | 19.0 | 3668 | 2025-05-10 23:13:28 | MASTER-OAFA | (09h 03m 06.64s , +05d 41m 53.6s) | C | 40 | 17.6 | 3678 | 2025-05-10 23:13:28 | MASTER-OAFA | (08h 53m 55.34s , +05d 19m 26.2s) | C | 60 | 19.3 | 3745 | 2025-05-10 23:14:45 | MASTER-OAFA | (09h 20m 24.61s , +07d 35m 03.9s) | C | 40 | 17.7 | 3756 | 2025-05-10 23:14:45 | MASTER-OAFA | (09h 11m 11.20s , +07d 12m 32.1s) | C | 60 | 19.3 | 3824 | 2025-05-10 23:16:03 | MASTER-OAFA | (08h 46m 35.12s , +03d 45m 49.5s) | C | 40 | 17.4 | 3834 | 2025-05-10 23:16:04 | MASTER-OAFA | (08h 37m 25.39s , +03d 23m 25.1s) | C | 60 | 19.1 | 3903 | 2025-05-10 23:17:22 | MASTER-OAFA | (09h 22m 58.02s , +09d 28m 41.5s) | C | 40 | 17.8 | 3913 | 2025-05-10 23:17:23 | MASTER-OAFA | (09h 13m 42.06s , +09d 06m 04.1s) | C | 60 | 19.4 | 3980 | 2025-05-10 23:18:40 | MASTER-OAFA | (09h 01m 52.76s , +03d 47m 45.9s) | C | 40 | 17.5 | 3991 | 2025-05-10 23:18:40 | MASTER-OAFA | (08h 52m 42.75s , +03d 25m 21.4s) | C | 60 | 19.3 | 4058 | 2025-05-10 23:19:57 | MASTER-OAFA | (09h 07m 30.76s , +09d 28m 27.1s) | C | 40 | 17.7 | 4068 | 2025-05-10 23:19:58 | MASTER-OAFA | (08h 58m 15.02s , +09d 05m 48.6s) | C | 60 | 19.5 | 4134 | 2025-05-10 23:21:13 | MASTER-OAFA | (09h 05m 04.47s , +07d 36m 06.6s) | C | 40 | 17.7 | 4144 | 2025-05-10 23:21:14 | MASTER-OAFA | (08h 55m 51.28s , +07d 13m 32.5s) | C | 60 | 19.4 | 4308 | 2025-05-10 23:24:07 | MASTER-OAFA | (08h 47m 48.67s , +05d 41m 58.8s) | C | 40 | 17.4 | 4318 | 2025-05-10 23:24:08 | MASTER-OAFA | (08h 38m 37.81s , +05d 19m 30.8s) | C | 60 | 18.9 | 4384 | 2025-05-10 23:25:24 | MASTER-OAFA | (09h 03m 10.75s , +05d 41m 08.5s) | C | 40 | 17.6 | 4394 | 2025-05-10 23:25:24 | MASTER-OAFA | (08h 53m 59.66s , +05d 18m 40.7s) | C | 60 | 19.1 | 4462 | 2025-05-10 23:26:42 | MASTER-OAFA | (09h 20m 16.31s , +07d 34m 20.1s) | C | 40 | 17.7 | 4473 | 2025-05-10 23:26:42 | MASTER-OAFA | (09h 11m 03.06s , +07d 11m 48.3s) | C | 60 | 19.2 | 4540 | 2025-05-10 23:28:00 | MASTER-OAFA | (08h 46m 41.42s , +03d 46m 01.9s) | C | 40 | 17.4 | 4551 | 2025-05-10 23:28:00 | MASTER-OAFA | (08h 37m 31.90s , +03d 23m 37.4s) | C | 60 | 19.0 | 4618 | 2025-05-10 23:29:18 | MASTER-OAFA | (09h 22m 54.00s , +09d 30m 22.2s) | C | 40 | 17.7 | 4628 | 2025-05-10 23:29:18 | MASTER-OAFA | (09h 13m 38.12s , +09d 07m 44.9s) | C | 60 | 19.3 | 4698 | 2025-05-10 23:30:38 | MASTER-OAFA | (09h 01m 52.32s , +03d 46m 19.6s) | C | 40 | 17.5 | 4708 | 2025-05-10 23:30:38 | MASTER-OAFA | (08h 52m 42.51s , +03d 23m 55.4s) | C | 60 | 19.1 | 4775 | 2025-05-10 23:31:55 | MASTER-OAFA | (09h 07m 33.62s , +09d 30m 04.9s) | C | 40 | 17.7 | 4785 | 2025-05-10 23:31:55 | MASTER-OAFA | (08h 58m 18.00s , +09d 07m 26.7s) | C | 60 | 19.4 | 4851 | 2025-05-10 23:33:11 | MASTER-OAFA | (09h 04m 57.09s , +07d 35m 27.3s) | C | 40 | 17.7 | 4862 | 2025-05-10 23:33:11 | MASTER-OAFA | (08h 55m 44.10s , +07d 12m 53.4s) | C | 60 | 19.3 | 4930 | 2025-05-10 23:34:30 | MASTER-OAFA | (08h 47m 54.19s , +05d 41m 14.7s) | C | 40 | 17.4 | 4941 | 2025-05-10 23:34:30 | MASTER-OAFA | (08h 38m 43.41s , +05d 18m 44.8s) | C | 60 | 19.0 | 5007 | 2025-05-10 23:35:46 | MASTER-OAFA | (09h 03m 05.73s , +05d 40m 24.1s) | C | 40 | 17.5 | 5017 | 2025-05-10 23:35:47 | MASTER-OAFA | (08h 53m 54.69s , +05d 17m 55.3s) | C | 60 | 19.1 | 5083 | 2025-05-10 23:37:03 | MASTER-OAFA | (09h 20m 23.31s , +07d 34m 43.4s) | C | 40 | 17.7 | 5094 | 2025-05-10 23:37:03 | MASTER-OAFA | (09h 11m 10.07s , +07d 12m 10.4s) | C | 60 | 19.1 | 5162 | 2025-05-10 23:38:22 | MASTER-OAFA | (08h 46m 38.03s , +03d 47m 57.1s) | C | 40 | 17.3 | 5173 | 2025-05-10 23:38:22 | MASTER-OAFA | (08h 37m 28.61s , +03d 25m 31.9s) | C | 60 | 18.9 | 5242 | 2025-05-10 23:39:41 | MASTER-OAFA | (09h 22m 53.54s , +09d 28m 45.0s) | C | 40 | 17.7 | 5252 | 2025-05-10 23:39:42 | MASTER-OAFA | (09h 13m 37.77s , +09d 06m 07.3s) | C | 60 | 19.3 | 5320 | 2025-05-10 23:41:00 | MASTER-OAFA | (09h 01m 54.38s , +03d 48m 23.7s) | C | 40 | 17.5 | 5330 | 2025-05-10 23:41:00 | MASTER-OAFA | (08h 52m 44.67s , +03d 25m 59.0s) | C | 60 | 19.0 | 5398 | 2025-05-10 23:42:17 | MASTER-OAFA | (09h 07m 27.75s , +09d 29m 44.3s) | C | 40 | 17.7 | 5408 | 2025-05-10 23:42:18 | MASTER-OAFA | (08h 58m 12.26s , +09d 07m 06.1s) | C | 60 | 19.3 | 5473 | 2025-05-10 23:43:33 | MASTER-OAFA | (09h 04m 56.34s , +07d 36m 39.5s) | C | 40 | 17.7 | 5484 | 2025-05-10 23:43:33 | MASTER-OAFA | (08h 55m 43.45s , +07d 14m 05.6s) | C | 60 | 19.2 | 5552 | 2025-05-10 23:44:51 | MASTER-OAFA | (08h 47m 49.09s , +05d 40m 24.5s) | C | 40 | 17.4 | 5562 | 2025-05-10 23:44:52 | MASTER-OAFA | (08h 38m 38.50s , +05d 17m 55.0s) | C | 60 | 18.9 | 5628 | 2025-05-10 23:46:08 | MASTER-OAFA | (09h 03m 11.45s , +05d 40m 56.4s) | C | 40 | 17.6 | 5639 | 2025-05-10 23:46:08 | MASTER-OAFA | (08h 54m 00.57s , +05d 18m 27.8s) | C | 60 | 19.1 | 5705 | 2025-05-10 23:47:25 | MASTER-OAFA | (09h 20m 19.52s , +07d 36m 39.8s) | C | 40 | 17.7 | 5715 | 2025-05-10 23:47:25 | MASTER-OAFA | (09h 11m 06.40s , +07d 14m 07.2s) | C | 60 | 19.3 | 5783 | 2025-05-10 23:48:43 | MASTER-OAFA | (08h 46m 37.72s , +03d 46m 50.6s) | C | 40 | 17.4 | 5794 | 2025-05-10 23:48:43 | MASTER-OAFA | (08h 37m 28.49s , +03d 24m 25.9s) | C | 60 | 18.9 | 5861 | 2025-05-10 23:50:01 | MASTER-OAFA | (09h 22m 56.76s , +09d 30m 53.4s) | C | 40 | 17.7 | 5872 | 2025-05-10 23:50:01 | MASTER-OAFA | (09h 13m 41.10s , +09d 08m 16.1s) | C | 60 | 19.3 | 5938 | 2025-05-10 23:51:18 | MASTER-OAFA | (09h 01m 47.87s , +03d 47m 35.9s) | C | 40 | 17.5 | 5948 | 2025-05-10 23:51:18 | MASTER-OAFA | (08h 52m 38.34s , +03d 25m 12.0s) | C | 60 | 19.1 | 6015 | 2025-05-10 23:52:35 | MASTER-OAFA | (09h 07m 26.39s , +09d 30m 55.0s) | C | 40 | 17.8 | 6025 | 2025-05-10 23:52:35 | MASTER-OAFA | (08h 58m 11.05s , +09d 08m 17.2s) | C | 60 | 19.2 | 6091 | 2025-05-10 23:53:51 | MASTER-OAFA | (09h 05m 02.19s , +07d 35m 49.1s) | C | 40 | 17.7 | 6101 | 2025-05-10 23:53:51 | MASTER-OAFA | (08h 55m 49.50s , +07d 13m 15.9s) | C | 60 | 19.2 | 6170 | 2025-05-10 23:55:09 | MASTER-OAFA | (08h 47m 54.28s , +05d 41m 01.5s) | C | 40 | 17.3 | 6180 | 2025-05-10 23:55:10 | MASTER-OAFA | (08h 38m 43.87s , +05d 18m 32.7s) | C | 60 | 18.8 | 6248 | 2025-05-10 23:56:27 | MASTER-OAFA | (09h 03m 07.31s , +05d 42m 40.8s) | C | 40 | 17.5 | 6258 | 2025-05-10 23:56:28 | MASTER-OAFA | (08h 53m 56.59s , +05d 20m 12.5s) | C | 60 | 19.0 | 6324 | 2025-05-10 23:57:44 | MASTER-OAFA | (09h 20m 19.06s , +07d 35m 12.4s) | C | 40 | 17.6 | 6335 | 2025-05-10 23:57:44 | MASTER-OAFA | (09h 11m 06.13s , +07d 12m 40.5s) | C | 60 | 19.1 | 6404 | 2025-05-10 23:59:04 | MASTER-OAFA | (08h 46m 40.91s , +03d 48m 01.2s) | C | 40 | 17.2 | 6414 | 2025-05-10 23:59:04 | MASTER-OAFA | (08h 37m 31.88s , +03d 25m 36.7s) | C | 60 | 18.8 | 6483 | 2025-05-11 00:00:22 | MASTER-OAFA | (09h 22m 49.32s , +09d 30m 08.6s) | C | 40 | 17.6 | 6493 | 2025-05-11 00:00:23 | MASTER-OAFA | (09h 13m 33.80s , +09d 07m 31.7s) | C | 60 | 19.2 | 6565 | 2025-05-11 00:01:45 | MASTER-OAFA | (09h 01m 48.71s , +03d 48m 44.6s) | C | 40 | 17.5 | 6575 | 2025-05-11 00:01:45 | MASTER-OAFA | (08h 52m 39.36s , +03d 26m 20.8s) | C | 60 | 19.0 | Filter C is a clear (unfiltred) band.

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

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