TITLE: GCN CIRCULAR NUMBER: 39354 SUBJECT: Fermi GRB 250217A: Global MASTER-Net observations report DATE: 25/02/17 19:16:43 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 250217A ( Fermi GBM team, GCN 39350) errorbox 37460 sec after notice time and 37513 sec after trigger time at 2025-02-17 18:12:39 UT, with upper limit up to 19.2 mag. Observations started at twilight. The observations began at zenith distance = 77 deg. The sun altitude is -10.1 deg.
The galactic latitude b = 46 deg., longitude l = 242 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2780694
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
37544 | 2025-02-17 18:12:39 | MASTER-SAAO | (10h 16m 22.94s , +03d 14m 00.2s) | C | 60 | 16.0 | 37623 | 2025-02-17 18:13:58 | MASTER-SAAO | (10h 24m 17.42s , +03d 13m 24.7s) | C | 60 | 16.1 | 37703 | 2025-02-17 18:15:18 | MASTER-SAAO | (10h 15m 33.52s , -00d 34m 28.6s) | C | 60 | 16.7 | 37782 | 2025-02-17 18:16:37 | MASTER-SAAO | (10h 23m 28.04s , -00d 35m 21.2s) | C | 60 | 16.7 | 37861 | 2025-02-17 18:17:56 | MASTER-SAAO | (10h 15m 38.07s , +01d 18m 56.8s) | C | 60 | 17.2 | 38020 | 2025-02-17 18:20:35 | MASTER-SAAO | (10h 00m 23.97s , +01d 20m 09.2s) | C | 60 | 17.7 | 38100 | 2025-02-17 18:21:55 | MASTER-SAAO | (10h 08m 18.74s , +01d 19m 21.9s) | C | 60 | 17.5 | 38179 | 2025-02-17 18:23:14 | MASTER-SAAO | (10h 23m 30.96s , +01d 20m 37.8s) | C | 60 | 17.5 | 38436 | 2025-02-17 18:27:32 | MASTER-SAAO | (10h 16m 23.35s , +03d 12m 29.7s) | C | 60 | 18.3 | 38516 | 2025-02-17 18:28:51 | MASTER-SAAO | (10h 24m 20.53s , +03d 14m 07.8s) | C | 60 | 18.4 | 38595 | 2025-02-17 18:30:11 | MASTER-SAAO | (10h 15m 29.71s , -00d 35m 07.5s) | C | 60 | 18.1 | 38675 | 2025-02-17 18:31:30 | MASTER-SAAO | (10h 23m 32.72s , -00d 33m 44.1s) | C | 60 | 18.3 | 38754 | 2025-02-17 18:32:49 | MASTER-SAAO | (10h 15m 31.84s , +01d 19m 27.7s) | C | 60 | 18.5 | 38913 | 2025-02-17 18:35:29 | MASTER-SAAO | (10h 00m 24.62s , +01d 19m 09.7s) | C | 60 | 18.8 | 38993 | 2025-02-17 18:36:48 | MASTER-SAAO | (10h 08m 18.72s , +01d 18m 19.4s) | C | 60 | 18.7 | 39072 | 2025-02-17 18:38:07 | MASTER-SAAO | (10h 23m 37.02s , +01d 18m 38.7s) | C | 60 | 18.5 | 39152 | 2025-02-17 18:39:27 | MASTER-SAAO | (10h 16m 19.26s , +03d 14m 18.3s) | C | 60 | 19.1 | 39231 | 2025-02-17 18:40:46 | MASTER-SAAO | (10h 24m 20.18s , +03d 13m 05.3s) | C | 60 | 19.0 | 39311 | 2025-02-17 18:42:06 | MASTER-SAAO | (10h 15m 32.19s , -00d 34m 00.4s) | C | 60 | 18.8 | 39390 | 2025-02-17 18:43:25 | MASTER-SAAO | (10h 23m 25.53s , -00d 34m 22.5s) | C | 60 | 18.9 | 39469 | 2025-02-17 18:44:45 | MASTER-SAAO | (10h 15m 30.42s , +01d 20m 26.2s) | C | 60 | 18.9 | 39549 | 2025-02-17 18:46:04 | MASTER-SAAO | (10h 00m 24.19s , +01d 19m 07.1s) | C | 60 | 19.0 | 39628 | 2025-02-17 18:47:23 | MASTER-SAAO | (10h 08m 16.84s , +01d 18m 16.3s) | C | 60 | 19.0 | 39707 | 2025-02-17 18:48:42 | MASTER-SAAO | (10h 23m 37.34s , +01d 18m 48.5s) | C | 60 | 18.8 | 39786 | 2025-02-17 18:50:01 | MASTER-SAAO | (10h 16m 18.87s , +03d 14m 16.4s) | C | 60 | 19.1 | 39866 | 2025-02-17 18:51:21 | MASTER-SAAO | (10h 24m 19.85s , +03d 12m 56.8s) | C | 60 | 19.3 | 39945 | 2025-02-17 18:52:40 | MASTER-SAAO | (10h 15m 32.39s , -00d 33m 35.0s) | C | 60 | 18.8 | 40025 | 2025-02-17 18:54:00 | MASTER-SAAO | (10h 23m 25.44s , -00d 34m 24.6s) | C | 60 | 18.8 | 40104 | 2025-02-17 18:55:19 | MASTER-SAAO | (10h 15m 29.65s , +01d 20m 24.1s) | C | 60 | 18.9 | 40183 | 2025-02-17 18:56:38 | MASTER-SAAO | (10h 00m 23.35s , +01d 19m 05.3s) | C | 60 | 19.0 | 40263 | 2025-02-17 18:57:58 | MASTER-SAAO | (10h 08m 18.16s , +01d 18m 15.0s) | C | 60 | 18.9 | 40342 | 2025-02-17 18:59:17 | MASTER-SAAO | (10h 23m 35.53s , +01d 18m 36.5s) | C | 60 | 18.6 | 40421 | 2025-02-17 19:00:37 | MASTER-SAAO | (10h 16m 18.59s , +03d 14m 08.5s) | C | 60 | 19.1 | 40503 | 2025-02-17 19:01:58 | MASTER-SAAO | (10h 24m 19.63s , +03d 12m 48.3s) | C | 60 | 18.6 | 40582 | 2025-02-17 19:03:17 | MASTER-SAAO | (10h 15m 30.89s , -00d 33m 42.9s) | C | 60 | 18.5 | 40661 | 2025-02-17 19:04:37 | MASTER-SAAO | (10h 23m 24.65s , -00d 34m 26.8s) | C | 60 | 18.6 | 40741 | 2025-02-17 19:05:56 | MASTER-SAAO | (10h 15m 29.20s , +01d 20m 22.3s) | C | 60 | 18.7 | 40820 | 2025-02-17 19:07:15 | MASTER-SAAO | (10h 00m 21.50s , +01d 19m 04.6s) | C | 60 | 18.9 | 40900 | 2025-02-17 19:08:35 | MASTER-SAAO | (10h 08m 17.00s , +01d 18m 13.4s) | C | 60 | 18.8 | 40979 | 2025-02-17 19:09:54 | MASTER-SAAO | (10h 23m 35.03s , +01d 18m 55.5s) | C | 60 | 18.7 | 41058 | 2025-02-17 19:11:13 | MASTER-SAAO | (10h 16m 18.03s , +03d 14m 19.4s) | C | 60 | 19.1 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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