{
  "bibcode": "2015GCN.18697....1R",
  "body": "R. Rebolo, M. Serra-Ricart, N. Lodieu, G. Israelian, L. Suarez-Andres\nThe Instituto de Astrofisica de Canarias\n\nE. Gorbovskoy, V. Lipunov, N.Tyurina, D. Vlasenko, V.Kornilov, \nP.Balanutsa, A.Kuznetsov, D. Vlasenko\nLomonosov Moscow State University, Sternberg Astronomical Institute\n\nO. Gress, K. Ivanov, N.M. Budnev, V.A. Poleshchuk, S.A. Yazev\nIrkutsk State University\n\nV.Yurkov, Yu.Sergienko, A.Gabovich, E.Sinyakov\nBlagoveschensk Educational State University, Blagoveschensk\n\nreport on behalf of the MASTER Team:\n\nMASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru, \nLipunov et al., \"MASTER Global Robotic Net\", Advances in Astronomy, 2010, \n34917111)  located in IAC was pointed to the  GRB151215A (Gibson et al. \nGCN 18691) 18 sec after notice time and 33 sec after trigger time at 2015-12-15 03:02:05 \nUT with 10s exposition in two perpendicular polarization  planes.\nWe detect  OT  (Cenko et al GCN 18691, Wiseman et al. GCN 18694)  in first \nimage with magnitude 17.8 +- 0.5 at a growing stage (midle time 38 sec \nafter trigger).\nWe definetely see OT on all images  till 1500-th second.\n\nThe GRB optical light curve have a maximum at third image (110 s after \ntriger time) with 17.0 +- 0.1 mag.\nThe automatic light curve in one polarization available here\nhttp://master.sai.msu.ru/static/GRB151215A_v1.png\nAll magnitudes are unfiltered (0.2B+0.8R) with respect to number USNO B1.0 \nstars.\n\nThis is preliminary results.\nThe message may be cited.",
  "circularId": 18697,
  "createdOn": 1450181975000,
  "email": "lipunov@xray.sai.msu.ru",
  "subject": "GRB 151215A: MASTER  early OT detection and light curve",
  "submitter": "Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>",
  "eventId": "GRB 151215A"
}