{
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "body": "V.M. Lipunov (Lomonosov MSU), V.Senik, E.Gorbovskoy, A.Kuznetsov, I.Panchenko,\nG.Antipov, P.Balanutsa, K.Zhirkov, N. Tiurina, Ya.Kechin,A.Chasovnikov, D.Vlasenko, Yu.Tselik(Lomonosov MSU, SAI, Moscow),\nO.A.Gress, N.M.Budnev, O.Ershova (Irkutsk State University),\nR. Podesta, C.Francile,  F. Podesta, E. Gonzalez (OAFA, San JuanUni.,Argentina);\nD.Buckley (SAAO),\nA. Sosnovskij (CrAO RAS),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nA. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity),\nL.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino, J.Martinez, A.R.Corella,\nL.H.Rodriguez (INAOE, Guillermo Haro Astrophysic Observatory, Mexico)\nV.M.Pillet, R.Rebolo Lopez (The Instituto de Astrofisica de Canarias,Spain)\n\nMASTER-Kislovodsk  robotic telescope of MASTER Global Robotic Net (Lipunov et al. [1-4], http://observ.pereplet.ru ),\nstarted Swift GRB 251205A (Lanava et al GCN 43005)\nerror-box observations in alert mode (PP filters) 19s after notice time at at 2025-12-05 23:41:19 UT, Lipunov et al. GCN 43004\n\nMASTER auto-detection system found optical counterpart\nMASTER OT J132105.37+295545.8 , first publishied by Swift (GCN 43005)\n with unfiltered m_OT~18.1m\nWe have also prompt wide-field cameras images, the reduction will be later.\n\nThere is host(possible) galaxy in 4.36\" from GRB counterpart with z_phot=0.25470(Cavuoti et al. 2014)\n\n\nReal time updated cover map and OT  position are available here:\nhttps://master.sai.msu.ru/site/master2/observ.php?id=3062088\nObservation and reduction will continue.\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. 2023,\nAstronomical Robotic Networks and Operative Multichanel Astrophysics,Lomonosov\nMSU PRESS, 591pp.\nhttp://www.pereplet.ru/lipunov/625.html#625",
  "submittedHow": "email",
  "eventId": "GRB 251205A",
  "bibcode": "2025GCN.43006....1L",
  "circularId": 43006,
  "subject": "Swift GRB 251205A : MASTER OT detection with host galaxy",
  "createdOn": 1764985361392
}