{
  "bibcode": "2014GCN.16629....1G",
  "body": "E. Gorbovskoy, D.Denisenko, V. Lipunov,  M.Pruzhinskaya, V.Kornilov, \nD.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, \nA.Kuznetsov, V.V.Chazov, A.Sankovich\nLomonosov Moscow State University,\nSternberg Astronomical Institute, Moscow State University\n\nK.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk\nIrkutsk State University\n\nV.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov\nBlagoveschensk Educational State University, Blagoveschensk\n\nA. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik\nKislovodsk Solar Station of the Pulkovo Observatory\n\nV.Krushinsky, I.Zalozhnih,  A. Popov\nUral Federal University, Yekaterinburg, Kourovka\n\nHugo Levato and Carlos Saffe\nInstituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)\n\nClaudio Mallamaci, Carlos Lopez and Federico Podest\nObservatorio Astronomico Felix Aguilar (OAFA)\n\nMASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated in Tunka was pointed to the GRB 140723A (Fermi trigger 427772193) \n48377 s (~13.4 h) after trigger time at 2014-07-23 15:02:47 UT directly \nafter sunset.  Observations were made at high zenith distance (z ~ 76d) \nwith the error box setting to the horizon. Therefore we have only two \n(180s exposure) successful images.\n\nOn our images we have not found optical transient within Fermi-LAT \nerror-box (Bissaldi et al. GCN 16623, Burns et. al GCN 16626) and IPN \n(Hurley et al. GCN  16625, Golenetskii et. al GCN 16628) brighter than \n18.3 mag. Thus we can not confirm the LCO-Sutherland OT (Guidorzi et al. \nGCN 16627) despite ~2 hours earlier time of observations and our upper \nlimit being 1 magnitude deeper than the estimated  object magnitude.\n\nThe 6x6 acrminutes MASTER-Tunka image around probable OT position (Guidorzi et \nal. GCN 16627) is available here:\nhttp://master.sai.msu.ru/static/GRB/GRB140723_LAT.png\n\nOur white (clear) band is well described by a parity 0.8R+0.2B (USNO B1).\n\nThe message may be cited.",
  "circularId": 16629,
  "createdOn": 1406209743000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB 140723A: MASTER optical observation",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 140723A"
}