{
  "bibcode": "2014GCN.16074....1Y",
  "body": "V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov\nBlagoveschensk Educational State University, Blagoveschensk\n\nK.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk\nIrkutsk State University\n\nE. Gorbovskoy, V. Lipunov, M. Pruzhinskaya, D.Denisenko, V.Kornilov, \nN.Tyurina,\nP.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov\nLomonosov Moscow State University, Sternberg Astronomical Institute\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 Blagoveschensk was pointed to the  GRB140402A (Jenke et. al GCN \n16070) ~ 13.6h  (49103 sec) after trigger time at 2014-04-02 13:48:30 UT \ndirectly after sunset and the weather conditions became good.\nWe haven`t found optical transient  within Fermi-LAT  (Bissaldi et. al. \nGCN 16069)  and SWIFT-BAT (Cummings et. al GCN 16073) error-boxes on \nsingle and coadd images.\nThe 5-sigma unfiltered upper limit has been about 18.2 mag on single (180 \ns) image and about 19.8 on coadd of 10 images with total exposure 1800 s.\n\nAlso MASTER II  robotic telescope  located in Kislovodsk was twice pointed \nto this GRB by FERMI-GBM two alert coordinates 23 s and ~ 1h after trigger \ntime. But the final Fermi-LAT and SWIFT-BAT position is out of our FOV due \nto big coordinates errors.\n\nThe message may be cited.",
  "circularId": 16074,
  "createdOn": 1396525983000,
  "email": "gcncirc@observ.inetcomm.ru",
  "subject": "GRB 140402A: MASTER optical observations",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>",
  "eventId": "GRB 140402A"
}