TITLE: GCN CIRCULAR NUMBER: 41093 SUBJECT: Fermi GRB 250714A: Global MASTER-Net observations report DATE: 25/07/15 05:31:23 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-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 250714A ( Fermi GBM team, GCN 41088) errorbox 76645 sec after notice time and 76677 sec after trigger time at 2025-07-15 04:33:10 UT, with upper limit up to 18.2 mag. Observations started at twilight. The observations began at zenith distance = 63 deg. The sun altitude is -13.5 deg.
The galactic latitude b = -16 deg., longitude l = 229 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2935479
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________
76707 | 2025-07-15 04:33:10 | MASTER-SAAO | (06h 08m 06.67s , -21d 35m 24.6s) | C | 60 | 17.9 | 76707 | 2025-07-15 04:33:10 | MASTER-SAAO | (06h 10m 03.90s , -21d 50m 47.4s) | C | 60 | 18.1 | 76801 | 2025-07-15 04:34:43 | MASTER-SAAO | (06h 16m 39.44s , -21d 36m 00.7s) | C | 60 | 17.7 | 76801 | 2025-07-15 04:34:43 | MASTER-SAAO | (06h 18m 36.55s , -21d 51m 23.8s) | C | 60 | 18.0 | 76894 | 2025-07-15 04:36:17 | MASTER-SAAO | (06h 13m 14.34s , -23d 28m 23.7s) | C | 60 | 18.1 | 76894 | 2025-07-15 04:36:17 | MASTER-SAAO | (06h 15m 13.24s , -23d 43m 46.0s) | C | 60 | 18.2 | 76988 | 2025-07-15 04:37:50 | MASTER-SAAO | (06h 21m 58.36s , -23d 29m 38.0s) | C | 60 | 17.8 | 76988 | 2025-07-15 04:37:50 | MASTER-SAAO | (06h 23m 57.16s , -23d 45m 00.4s) | C | 60 | 18.0 | 77361 | 2025-07-15 04:44:03 | MASTER-SAAO | (06h 10m 03.46s , -21d 50m 52.0s) | C | 60 | 16.9 | 77361 | 2025-07-15 04:44:03 | MASTER-SAAO | (06h 08m 05.85s , -21d 35m 28.9s) | C | 60 | 16.5 | 77454 | 2025-07-15 04:45:37 | MASTER-SAAO | (06h 18m 34.24s , -21d 51m 29.2s) | C | 60 | 16.8 | 77548 | 2025-07-15 04:47:10 | MASTER-SAAO | (06h 15m 15.43s , -23d 45m 20.1s) | C | 60 | 16.9 | Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
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