TITLE: GCN CIRCULAR NUMBER: 42068 SUBJECT: Swift GRB251003.08: Global MASTER-Net observations report DATE: 25/10/03 02:04:38 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) was pointed to the Swift GRB251003.08 (trigger No 1400964,01h 14m 00.72s , +56d 30m 25.2s, R=0.05) errorbox 10 sec after notice time and 34 sec after trigger time at 2025-10-03 01:59:04 UT, with upper limit up to 16.6 mag. Observations started at twilight. The observations began at zenith distance = 43 deg. The sun altitude is -13.7 deg. The galactic latitude b = -6 deg., longitude l = 126 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3005736 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 40 | MASTER-Kislovodsk | P- | 10 | 15.8 | 50 | MASTER-Kislovodsk | P- | 30 | 16.4 | Coadd 40 | MASTER-Kislovodsk | P| | 10 | 14.6 | 58 | MASTER-Kislovodsk | P- | 10 | 16.0 | 58 | MASTER-Kislovodsk | P| | 10 | 15.0 | 77 | MASTER-Kislovodsk | P- | 10 | 16.2 | 77 | MASTER-Kislovodsk | P| | 10 | 15.1 | 100 | MASTER-Kislovodsk | P- | 20 | 16.5 | 100 | MASTER-Kislovodsk | P| | 20 | 15.8 | 129 | MASTER-Kislovodsk | P- | 20 | 16.5 | 129 | MASTER-Kislovodsk | P| | 20 | 15.6 | 162 | MASTER-Kislovodsk | P- | 30 | 16.6 | 162 | MASTER-Kislovodsk | P| | 30 | 15.9 | The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/42068. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...