TITLE: GCN CIRCULAR NUMBER: 38358 SUBJECT: Swift GRB241127.91: Global MASTER-Net OT detection DATE: 24/11/28 03:15:55 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru> C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), V.Lipunov, E.Gorbovskoy, N.Tiurina, P.Balanutsa, D.Vlasenko, I.Panchenko, A.Kuznetsov, G.Antipov, A.Sankovich, A.Sosnovskij, Yu.Tselik, M.Gulyaev, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina (Lomonosov MSU), O.Gress, N.Budnev(ISU), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), 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 GRB241127.91 9640 sec after notice time and 9658 sec after trigger time at 2024-11-28 00:24:14 UT. On our 9-th (60s exposure) set , obtained 10200 sec after tigger time at 2024-11-28 00:33:17 UT, we found 1 optical transient within Swift error-box (ra=327.921 dec=-56.685 r=0.05) brighter than 19.3. T-Tmid Date Time Expt. Ra Dec Mag ---------|---------------------|-------|-----------------|-----------------|------- 10230 2024-11-28 00:33:17 60 (21h 51m 32.32s , -56d 39m 56.5s) 19.4 The 5-sigma upper limit has been about 19.3mag The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/38358. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...