TITLE: GCN CIRCULAR NUMBER: 45068 SUBJECT: Fermi trigger No 804738310: Global MASTER-Net observations report DATE: 26/07/03 04:33:55 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), M. Segura, 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-OAGH robotic telescope [1] located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) started inspect of the Fermi GRB260703.10 (trigger No 804738310,21h 00m 43.92s , +48d 28m 01.2s, R=19.2) errorbox 4283 sec after notice time and 4323 sec after trigger time at 2026-07-03 03:37:09 UT, with upper limit up to 17.8 mag. Observations started at twilight. The observations began at zenith distance = 69 deg. The sun altitude is -13.3 deg. The galactic latitude b = 1 deg., longitude l = 89 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3412721 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 4354 | 2026-07-03 03:37:09 | MASTER-OAGH | (22h 18m 30.52s , +65d 39m 41.5s) | C | 60 | 17.0 | 4354 | 2026-07-03 03:37:09 | MASTER-OAGH | (22h 32m 37.85s , +65d 00m 33.9s) | C | 60 | 17.3 | 4430 | 2026-07-03 03:38:25 | MASTER-OAGH | (22h 18m 28.10s , +65d 40m 16.0s) | C | 60 | 17.0 | 4430 | 2026-07-03 03:38:25 | MASTER-OAGH | (22h 32m 35.76s , +65d 01m 08.8s) | C | 60 | 17.4 | 6859 | 2026-07-03 04:18:54 | MASTER-OAGH | (22h 12m 20.69s , +67d 31m 22.6s) | C | 60 | 17.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. [1] - V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina & A.S.Kuznetsov, 2023, Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp. http : // www.pereplet.ru/lipunov/625.html View this GCN Circular online at https://gcn.nasa.gov/circulars/45068. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...