{
  "bibcode": "2014GCN.15932....1G",
  "body": "E. Gorbovskoy, V. Lipunov, M. Pruzhinskaya, D.Denisenko, V.Kornilov, N.Tyurina, \nP.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov\nLomonosov Moscow State University, Sternberg Astronomical Institute\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.Krushinski, I.Zalozhnih,  A. Popov\nUral Federal University, 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  GRB140304A (Evans et. al GCN 15915) \n26 sec after notice time and 77 sec after trigger\ntime at 2014-03-04 13:23:49 UT.  We detect OT (Gorbovskoy et. al GCN \n15914) in two polarization bands during ~1 h while the source was brighter \nthan our upper limit.\nThe preliminary photometry result available in table 1 and here \nhttp://master.sai.msu.ru/static/GRB/grb140304A.png  .\n\nTable 1. Preliminary early GRB140304A observations.\n\nT_start(JD)    T_trig-T_mid   Exptime   Mag1    Mag2   Coadd\n2456721.05834       82            10    16.8    16.2    -\n2456721.05931      172            30    17.2    16.9    -\n2456721.06073      294            50    18.0    17.6    -\n2456721.06142      358           120    18.1    17.6    2\n2456721.06211      413            70    18.3    18.0    -\n2456721.06724      894           580    18.5    18.5    4\n2456721.08121      2070         1080    19.6    19.0    6\n2456721.09812      3526         1080    19.9    19.4    6\n\nMag1 and Mag2 - Magnitude in two perpendicular polarizations.\nThe power low index alpha is 0.77+-0.05  (F ~ t-apha).\n\n\nMASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated in Blagoveschensk was pointed to the  GRB140304A  5 sec after \nnotice time and 46 sec after trigger time at 2014-03-04 13:23:17 UT.\nThe observations  on this site made on bad weather conditions and on high \nzenith distance. The 5-sigma upper limit On our first (10s exposure) image \nhas been about 13.0 mag.\n\n\nThe message may be cited.",
  "circularId": 15932,
  "createdOn": 1394044897000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB 140304A: MASTER OT light curve",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 140304A"
}