TITLE: GCN CIRCULAR NUMBER: 40787 SUBJECT: Fermi trigger No 772058337: Global MASTER-Net observations report DATE: 25/06/19 22:45:44 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-Kislovodsk robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB250619.86 (trigger No 772058337,03h 12m 26.40s , +44d 13m 48.0s, R=2.33) errorbox 4841 sec after notice time and 4865 sec after trigger time at 2025-06-19 21:59:58 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 80 deg. The sun altitude is -22.6 deg. The galactic latitude b = -11 deg., longitude l = 148 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2908907 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 4896 | 2025-06-19 21:59:58 | MASTER-Kislovodsk | (03h 06m 25.90s , +44d 50m 12.6s) | C | 60 | 17.2 | 5071 | 2025-06-19 22:02:53 | MASTER-Kislovodsk | (03h 12m 52.91s , +46d 45m 24.6s) | C | 60 | 17.2 | 5154 | 2025-06-19 22:04:16 | MASTER-Kislovodsk | (03h 24m 34.40s , +46d 45m 56.5s) | C | 60 | 17.3 | 5403 | 2025-06-19 22:08:25 | MASTER-Kislovodsk | (03h 02m 27.80s , +46d 47m 07.6s) | C | 60 | 17.3 | 5578 | 2025-06-19 22:11:20 | MASTER-Kislovodsk | (03h 06m 28.14s , +44d 52m 52.9s) | C | 60 | 17.3 | 5661 | 2025-06-19 22:12:43 | MASTER-Kislovodsk | (03h 17m 38.96s , +44d 51m 28.3s) | C | 60 | 17.2 | 5743 | 2025-06-19 22:14:05 | MASTER-Kislovodsk | (03h 12m 54.50s , +46d 46m 42.9s) | C | 60 | 17.4 | 5826 | 2025-06-19 22:15:28 | MASTER-Kislovodsk | (03h 24m 40.11s , +46d 45m 13.5s) | C | 60 | 17.3 | 6077 | 2025-06-19 22:19:39 | MASTER-Kislovodsk | (03h 02m 27.42s , +46d 47m 10.1s) | C | 60 | 17.4 | 6244 | 2025-06-19 22:22:26 | MASTER-Kislovodsk | (03h 06m 28.86s , +44d 53m 25.7s) | C | 60 | 17.5 | 6327 | 2025-06-19 22:23:49 | MASTER-Kislovodsk | (03h 17m 40.69s , +44d 52m 12.9s) | C | 60 | 17.3 | 6412 | 2025-06-19 22:25:14 | MASTER-Kislovodsk | (03h 12m 57.33s , +46d 47m 26.3s) | C | 60 | 17.4 | 6495 | 2025-06-19 22:26:37 | MASTER-Kislovodsk | (03h 24m 41.92s , +46d 45m 56.0s) | C | 60 | 17.3 | 6754 | 2025-06-19 22:30:56 | MASTER-Kislovodsk | (03h 02m 30.16s , +46d 48m 08.5s) | C | 60 | 17.4 | 6837 | 2025-06-19 22:32:19 | MASTER-Kislovodsk | (03h 00m 34.54s , +43d 00m 19.8s) | C | 60 | 17.1 | 6920 | 2025-06-19 22:33:42 | MASTER-Kislovodsk | (03h 11m 23.71s , +42d 59m 05.0s) | C | 60 | 17.4 | 7003 | 2025-06-19 22:35:05 | MASTER-Kislovodsk | (03h 06m 25.12s , +44d 54m 19.2s) | C | 60 | 17.5 | 7084 | 2025-06-19 22:36:26 | MASTER-Kislovodsk | (03h 17m 47.10s , +44d 52m 51.5s) | C | 60 | 17.4 | 7167 | 2025-06-19 22:37:49 | MASTER-Kislovodsk | (03h 12m 58.65s , +46d 46m 06.0s) | C | 60 | 17.5 | 7249 | 2025-06-19 22:39:11 | MASTER-Kislovodsk | (03h 24m 43.51s , +46d 45m 51.7s) | C | 60 | 17.5 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/40787. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...