TITLE: GCN CIRCULAR NUMBER: 43706 SUBJECT: Fermi trigger No 792537871: Global MASTER-Net observations report DATE: 26/02/12 03:45:23 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 [1] located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the Fermi GRB260211.89 (trigger No 792537871,23h 48m 28.80s , +30d 46m 12.0s, R=34.27) errorbox 18265 sec after notice time and 18297 sec after trigger time at 2026-02-12 02:29:23 UT, with upper limit up to 17.2 mag. The observations began at zenith distance = 78 deg. The sun altitude is -19.5 deg. The galactic latitude b = -30 deg., longitude l = 108 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3130746 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 18327 | 2026-02-12 02:29:23 | MASTER-Kislovodsk | (21h 58m 56.93s , +35d 01m 22.9s) | C | 60 | 16.3 | 18530 | 2026-02-12 02:32:46 | MASTER-Kislovodsk | (21h 44m 21.28s , +31d 13m 22.2s) | C | 60 | 16.7 | 18633 | 2026-02-12 02:34:29 | MASTER-Kislovodsk | (21h 44m 08.70s , +35d 03m 08.1s) | C | 60 | 17.2 | 18737 | 2026-02-12 02:36:13 | MASTER-Kislovodsk | (22h 16m 28.22s , +36d 53m 34.1s) | C | 60 | 16.8 | 18843 | 2026-02-12 02:37:59 | MASTER-Kislovodsk | (22h 01m 25.76s , +36d 55m 41.2s) | C | 60 | 16.9 | 18950 | 2026-02-12 02:39:46 | MASTER-Kislovodsk | (21h 46m 16.13s , +36d 55m 11.8s) | C | 60 | 17.1 | 19053 | 2026-02-12 02:41:29 | MASTER-Kislovodsk | (21h 58m 25.10s , +31d 13m 00.7s) | C | 60 | 17.0 | 19157 | 2026-02-12 02:43:13 | MASTER-Kislovodsk | (21h 57m 53.44s , +33d 06m 38.0s) | C | 60 | 16.8 | 19268 | 2026-02-12 02:45:04 | MASTER-Kislovodsk | (21h 32m 38.88s , +29d 21m 20.9s) | C | 60 | 17.1 | 19375 | 2026-02-12 02:46:51 | MASTER-Kislovodsk | (21h 29m 10.76s , +33d 10m 27.5s) | C | 60 | 17.1 | 19483 | 2026-02-12 02:48:38 | MASTER-Kislovodsk | (22h 12m 19.53s , +33d 07m 06.1s) | C | 60 | 16.8 | 19614 | 2026-02-12 02:50:50 | MASTER-Kislovodsk | (21h 49m 55.83s , +27d 26m 35.5s) | C | 60 | 16.7 | 19846 | 2026-02-12 02:54:42 | MASTER-Kislovodsk | (21h 41m 32.63s , +25d 32m 40.8s) | C | 60 | 16.6 | 19963 | 2026-02-12 02:56:39 | MASTER-Kislovodsk | (22h 05m 28.01s , +38d 49m 01.7s) | C | 60 | 17.0 | 20093 | 2026-02-12 02:58:49 | MASTER-Kislovodsk | (22h 12m 30.29s , +31d 13m 05.4s) | C | 60 | 16.3 | 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/43706. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...