{
  "submittedHow": "email",
  "bibcode": "2025GCN.39735....1K",
  "eventId": "GRB 250313.89",
  "subject": "GRB 250313.89 / Fermi trigger 763594063: bright OT AT 2025ehi  detection",
  "body": "\nYa.Kechin, V.Lipunov,N.Tyurina, E.Gorbovskoy, A.Kuznetsov, G.Antipov, D.Vlasenko,K.Zhirkov, P.Balanutsa,\nA.Chasovnikov, V.Topolev, V.Senik, K.Labzina (Lomonosov MSU),\nD.Buckley (SAAO),\nC.Francile,  F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA),\nA.Sosnovskij (Crao RAS),\nO.Gress, N.Budnev, O.Ershova (ISU),\nA. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),\nA. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity),\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)\n\n\nMASTER Global Robotic Net (Lipunov, Kornilov, Gorbovskoy, Tiurina & Kuznetsov, 2023, Astronomical Robotic Networks and\nOperative Multichanel Astrophysics, Lomonosov MSU PRESS, 591pp, http://www.pereplet.ru/lipunov/625.html#625)\nstarted observation  GRB 250313.89 (trigger 763594063, Ttrigger= 2025-03-13  21:27:38.85UT center (14h 43m 16.01s , -45d 40m 00.1s, radius=8.4167deg;\nhttps://master.sai.msu.ru/site/master2/event.php?id=2811407  )\nat 2025-03-14 07:26:28 (OAFA, Argentina) and 2025-03-14 23:24:55 (SAAO,\nSouth Africa).\n\nCover map is available at\nhttps://master3.sai.msu.ru:444/static/png/GRB250313.89/FERMI//1107805802.png.1.png\n\nMASTER OT J150644.86-414140.4 (AT 2025ehi)  detection inside 1 sigma errobox.\n\n\nMASTER-OAFA auto-detection system ( Lipunov et al., \"MASTER Global Robotic Net\", Advances in Astronomy, 2010, 30L )\n discovered OT source at (RA, Dec) = 15h 06m 44.86s -41d 41m 40.4s on 2025-03-14.20999 UT.\n\nThe OT magnitude in 'Clear' filter is 16.0m\n(mlim = 18.9).\n\nThe OT is seen in 38 images.\nWe see the growing light  curve of shine up to 13 zyading values ​​within 1 day.\nThere is no minor planet at this place.\n\nWe have reference image on 2025-03-02.26325 UT with 'Clear' filter 19.9m.\nThere is the  Guide Star Catalog object 22 magnitude  at same position.\nSpectral observations are required.\n",
  "createdOn": 1742048930911,
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>",
  "circularId": 39735
}