TITLE: GCN CIRCULAR NUMBER: 40912 SUBJECT: EP250702a: Global MASTER-Net observations report DATE: 25/07/03 11:09:30 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) was pointed to the EP250702a ( EP Team et al., GCN 40906) errorbox 1 days 2370 sec after trigger time at 2025-07-03 03:33:14 UT, with upper limit up to 17.4 mag. The observations began at zenith distance = 29 deg. The sun altitude is -73.4 deg. The galactic latitude b = -6 deg., longitude l = 27 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2923840 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 88860 | 2025-07-03 03:33:14 | MASTER-OAFA | (18h 57m 22.01s , -08d 01m 07.7s) | C | 180 | 17.4 | 89047 | 2025-07-03 03:36:20 | MASTER-OAFA | (18h 57m 21.64s , -08d 01m 10.1s) | C | 180 | 17.3 | 89233 | 2025-07-03 03:39:27 | MASTER-OAFA | (18h 57m 21.26s , -08d 01m 13.3s) | C | 180 | 17.4 | 89419 | 2025-07-03 03:42:32 | MASTER-OAFA | (18h 57m 20.88s , -08d 01m 16.3s) | C | 180 | 17.3 | 104587 | 2025-07-03 07:56:21 | MASTER-OAFA | (18h 58m 32.22s , -07d 41m 30.2s) | C | 60 | 17.4 | 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/40912. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...