{
  "eventId": "GRB 251018A",
  "bibcode": "2025GCN.42346....1L",
  "body": " V. Lipunov, I.Panchenko, A.Kuznetsov, G.Antipov, P.Balanutsa, E.Gorbovskoy,\n K.Zhirkov,  N.Tiurina, A.Sankovich, Ya.Kechin,  Yu. Tselik, M.Shilova, A.Chasovnikov, V.Topolev,\n V.Senik, D.Vlasenko, V.Shumkov, K.Vetrov, P.Rudominskaya (Lomonosov MSU, SAI, Moscow),\n R.Podesta, C.Francile,  F. Podesta, E. Gonzalez (OAFA, San Juan  Uni.,Argentina);\n D.Buckley, (SAAO, South Africa)\n O.Gress, N.Budnev (ISU, Irkutsk),\nA.Sosnovskij (CrAO RAS),\n A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo  Observatory),\n A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity),\n V.M.Pillet, R.Rebolo Lopez (The Instituto de Astrofisica de Canarias, Spain),\n L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino  Alvarez,J.Martinez,A.R.Corella,L.H.Rodriguez (INAOE, Guillermo Haro  Astrophysic Observatory, Mexico)\n\n\n The MASTER-OAFA robotic telescope of  MASTER Global Robotic Net [1-4]\n started Fermi (GCN 42342) and Swift  GRB 251018A (Gupta et al. GCN 42343, Trigger time 2025-10-18 03:12:02UT)\n105s after notice time (141s after trigger time) at 2025-10-18 03:14:24 UT (Lipunov et al. GCN 42344, cover map and OT https://master.sai.msu.ru/site/master2/observ.php?id=3017251\n\nThere is MASTER OT J184810.01-370141.6,detected since first image (03:14:24) with m_OT=16.5 at 2025-10-18 03:16:46 (unfiltered, automatically calculated)\nThis OT was discovered by Swift-UVOT (Gupta et al. GCN 42343) and observed by TRT (S.Y.Fu et al. GCN 42345) at the same time.\n\nObservation and reduction will be continued.\n\n\n[1] Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L\n[2] Lipunov et al. 2022, Universe, Vol. 8(5), id.271\n[3] Lipunov et a. 2019, ARep, vol.63, 293\n[4] Lipunov V., Kornilov V., Gorbovskoy E., Tiurina N., Kuznetsov A.\n 2023,  Astronomical Robotic Networks and Operative Multichanel Astrophysics,Lomonosov MSU PRESS, 591pp.\nhttp://www.pereplet.ru/lipunov/625.html#625\n\n",
  "circularId": 42346,
  "submittedHow": "email",
  "createdOn": 1760773883255,
  "subject": "GRB 251018A: MASTER OT detection",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>"
}