{
  "submittedHow": "email",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "version": 2,
  "circularId": 41558,
  "eventId": "EP250827a",
  "createdOn": 1756289382997,
  "bibcode": "2025GCN.41558....1L",
  "subject": "EP250827a / GRB 250827A: MASTER-OAFA OT observation",
  "format": "text/plain",
  "body": "V.Lipunov, A.Kuznetsov, I.Panchenko, G.Antipov, P.Balanutsa, K.Zhirkov (Lomonosov MSU), C.Francile,  F. Podesta, R.Podesta, E. Gonzalez (OAFA),\nA.Chasovnikov, E.Gorbovskoy, N.Tiurina, Ya.Kechin, D.Vlasenko, V.Senik, M. Shilova, I.Lipunov, V.Topolev (Lomonosov MSU), O.Gress, N.Budnev(ISU),\nD.Buckley (SAAO),\nA.Sosnovskij (Crao RAS),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nR.Rebolo (The Instituto de Astrofisica de Canarias),\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez,J.Martinez,A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro  AstrophysicsObservatory\nA. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity)\n\nMASTER-OAFA robotic telescope (Lipunov et al. GCN 41556)\nstarted EP GRB 250827A observation at 2025-08-27 07:46:54 UT\nand detected optical couterpart of this GRB\nMASTER OT J001352.27-562952.8 with m_OT (unfiltered) = 18.9m (preliminary) at 2025-08-27 07:48:10 https://master.sai.msu.ru/site/master2/event.php?id=2978010 The light curve demonstrates multipeak structure from 18 to 19 during last hour.\n\nThis OT coincide with GEMINI-South detection ( GCN 41554 Levan et al.) and Las Cumbres one (GCN 41555 Wenxiong Li et al.)\n",
  "editedOn": 1756300847523,
  "editedBy": "Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Vladimir Lipunov at Lomonosov Moscow State University <lipunov@sai.msu.ru>"
}