TITLE: GCN CIRCULAR NUMBER: 46188 SUBJECT: SVOM GRB261108.05: Global MASTER-Net observations report DATE: 26/11/08 02:00:40 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs M. Segura, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA) 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 (Lomonosov MSU) D.Buckley (SAAO), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) A.Sosnovskij (Lomonosov MSU) A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory) L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) R.Rebolo (The Instituto de Astrofisica de Canarias) O.Gress, N.Budnev(ISU) MASTER-OAFA robotic telescope [1] located in Argentina (OAFA observatory of San Juan National University) was pointed to the SVOM GRB261108.05 (trigger No 1794100398,22h 26m 03.77s , -20d 12m 27.7s, R=0.0799) errorbox 43 sec after notice time and 2388 sec after trigger time at 2026-11-08 01:53:06 UT, with upper limit up to 20.4 mag. The observations began at zenith distance = 29 deg. The sun altitude is -30.4 deg. The galactic latitude b = -57 deg., longitude l = 38 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=3532401 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 2418 | 2026-11-08 01:53:06 | MASTER-OAFA | (22h 25m 07.57s , -20d 16m 44.2s) | C | 60 | 20.2 | 2484 | 2026-11-08 01:54:11 | MASTER-OAFA | (22h 25m 07.58s , -20d 16m 43.4s) | C | 60 | 20.3 | 2549 | 2026-11-08 01:55:17 | MASTER-OAFA | (22h 25m 07.59s , -20d 16m 42.4s) | C | 60 | 20.4 | 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