TITLE: GCN CIRCULAR NUMBER: 40742 SUBJECT: Fermi trigger No 771752663: Global MASTER-Net observations report DATE: 25/06/16 09:15:27 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 GRB250616.32 (trigger No 771752663,19h 04m 43.92s , -07d 46m 01.2s, R=27.15) errorbox 2889 sec after notice time and 2923 sec after trigger time at 2025-06-16 08:33:01 UT, with upper limit up to 17.0 mag. The observations began at zenith distance = 48 deg. The sun altitude is -37.2 deg. The galactic latitude b = -7 deg., longitude l = 28 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2903763 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 3013 | 2025-06-16 08:33:01 | MASTER-OAFA | (19h 20m 17.19s , +04d 53m 38.9s) | C | 180 | 17.0 | 3152 | 2025-06-16 08:36:20 | MASTER-OAFA | (19h 21m 22.31s , +04d 51m 02.3s) | C | 60 | 16.9 | 3239 | 2025-06-16 08:37:47 | MASTER-OAFA | (19h 21m 16.18s , +04d 50m 03.8s) | C | 60 | 16.9 | 3315 | 2025-06-16 08:39:03 | MASTER-OAFA | (19h 21m 21.58s , +04d 50m 26.3s) | C | 60 | 16.9 | 3395 | 2025-06-16 08:40:22 | MASTER-OAFA | (19h 21m 19.40s , +04d 51m 42.4s) | C | 60 | 17.0 | 3468 | 2025-06-16 08:41:36 | MASTER-OAFA | (19h 21m 19.35s , +04d 50m 15.0s) | C | 60 | 17.0 | 3546 | 2025-06-16 08:42:54 | MASTER-OAFA | (19h 21m 21.84s , +04d 51m 40.9s) | C | 60 | 17.0 | 3623 | 2025-06-16 08:44:11 | MASTER-OAFA | (19h 21m 16.42s , +04d 51m 07.8s) | C | 60 | 17.0 | 3699 | 2025-06-16 08:45:27 | MASTER-OAFA | (19h 21m 17.11s , +04d 52m 08.6s) | C | 60 | 17.0 | 3779 | 2025-06-16 08:46:47 | MASTER-OAFA | (19h 21m 21.43s , +04d 51m 09.2s) | C | 60 | 17.0 | 3861 | 2025-06-16 08:48:09 | MASTER-OAFA | (19h 21m 15.96s , +04d 50m 10.0s) | C | 60 | 17.0 | 3938 | 2025-06-16 08:49:26 | MASTER-OAFA | (19h 21m 22.10s , +04d 50m 10.0s) | C | 60 | 17.0 | 4012 | 2025-06-16 08:50:40 | MASTER-OAFA | (19h 21m 19.19s , +04d 52m 05.4s) | C | 60 | 17.0 | 4530 | 2025-06-16 08:59:18 | MASTER-OAFA | (19h 21m 32.36s , +04d 51m 07.1s) | C | 60 | 16.7 | 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/40742. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...