{
  "createdOn": 1759454827429,
  "editedOn": 1759518528656,
  "bibcode": "2025GCN.42067....1S",
  "format": "text/plain",
  "eventId": "GRB 251002A",
  "subject": "Fermi/SVOM GRB 251002A : MASTER OT earlier detection in 2 polarization filters",
  "editedBy": "Vidushi Sharma at NASA GSFC/UMBC <vidushi.sharma@nasa.gov> on behalf of Vladimir Lipunov at Lomonosov Moscow State University <lipunov@sai.msu.ru>",
  "submittedHow": "email",
  "version": 2,
  "circularId": 42067,
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "body": "\nV.Senik, V. Lipunov, E.Gorbovskoy, A.Kuznetsov, I.Panchenko, P.Balanutsa, N.Tiurina, A.Sankovich, G.Antipov,Yu. Tselik, A. Sosnovskiy,  M.Shilova, A.Chasovnikov, V.Topolev,\nK.Zhirkov, Ya.Kechin, V.Senik, D.Vlasenko(Lomonosov MSU, SAI, Moscow),\nA.Sosnovskij (CrAO RAS),\nR.Podesta, C.Francile,  F. Podesta, E. Gonzalez (OAFA, San Juan  Uni.,Argentina);\nD.Buckley, (SAAO, South Africa)\nO.Gress, N.Budnev (ISU, Irkutsk),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nA. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity),\nV.M.Pillet, R.Rebolo Lopez (The Instituto de Astrofisica de Canarias, Spain),\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez,J.Martinez,A.R.Corella,\nL.H.Rodriguez (INAOE, Guillermo Haro  Astrophysic Observatory, Mexico)\n\nThe MASTER-Kislovodsk robotic telescope of the MASTER Global Robotic Net [1], [2]\nstarted Fermi GRB 251002A (trigger 781128896, Ttrigger=2025-10-02 20:14:51UT)\nat 2025-10-02 20:19:42 (Lipunov et al. GCN 42059, cover map and OT\nhttps://master.sai.msu.ru/site/master2/event.php?id=3005541&action=12&SAT=SVOM&DAYS=2++  )\n in two mutually perpendicular polarization filters.\n\nThere is MASTER OT J005537.81-053401.0 since the first image with\nunfiltered m_OT~17.2 at 2025-10-02 20:22:09.308(not first time)\nwith preliminary detected polarization.\n\nThis OT was first publishied (discovered) by SVOM (GCN 42061), and also by LCO (Turpin et al. GCN 42062), FREM-ORM (Jelinek et al. GCN 42063), SAO RAS (Moskvitin et al. GCN 42065) and BOOTES (Perez-Garcia et al. GCN 42066)\n\nObservations and reduction will be continued.\n\n[1] Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L\n[2] V.M. Lipunov, V.G. Kornilov, E.S. Gorbovskoy, N.A. Tiurina,A.S.Kuznetsov\n 2023,  Astronomical Robotic Networks and Operative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp.\nhttp://www.pereplet.ru/lipunov/625.html#625\n"
}