{
  "bibcode": "2015GCN.17518....1B",
  "body": "D.Buckley, S. Potter, A.Kniazev, M.Kotze\nSouth African Astronomical Observatory\n\nE. Gorbovskoy, V. Lipunov,  V.Kornilov,\nN.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov,\nLomonosov Moscow State University,\nSternberg Astronomical Institute, Moscow 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\n\nMASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) \nlocated in SAAO was pointed to the  GRB150301.82 (Lien et al, GCN 17515) \n60 sec after notice time \nand 79 sec after trigger time at 2015-03-01 19:39:23 UT in two \npolarizations. On our first (10s \nexposure)  set we  found 1 optical transient within SWIFT error-box (ra=05 \n56 37 dec=-57 58 35 r=0.050000).\n\n                      T_start      RA            DEC     Exp     unfiltered\n                          s                                      magnitude\n  2015-03-01 19:39:23   79.0   05h 56m 39.94s  -57d 58m  10.0s     15.3\n\nThe error is about 0.5 arcsec. This position is coincidet with UVOT data.\nWe detected OT before maximum brightness.\nThe 5-sigma upper limit has been about 16.8 mag . The telegram is \ngenerated automatically.\nWe have number of the images after maximum in two polarizations. The \nreduction is continuated.\nThe message may be cited.",
  "circularId": 17518,
  "createdOn": 1425243101000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 150301B: MASTER early  OT detection",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 150301B"
}