GCN Circular 12762

E. Sinykov, V.Yurkov, Yu.Sergienko, D.Varda,
  Blagoveschensk Educational State University, Blagoveschensk

  E. Gorbovskoy, V. Lipunov, V.Kornilov, D.Kuvshinov, A.Belinski,
N.Tyurina, N.Shatskiy, P.Balanutsa, V.V.Chazov,  A.Kuznetsov,
D.Zimnukhov, M. Kornilov, A.Kuznetsov, D.Zimnukhov, M. Kornilov,
A.Sankovich, S. Shurpakov
  Sternberg Astronomical Institute, Moscow State University

  K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev, O.Gres, 
O.Chuvalaev,E.Konstantinov,
  Irkutsk State University

  A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
  Kislovodsk Solar Station of the Pulkovo Observatory

  V.Krushinski, I.Zalozhnich, A. Popov
  Ural State University, Kourovka



  2 cameras MASTER VFW (FOV=2x420 sq.deg.) located in Blagoveschensk  made 
observations synchronously with this GRB111228.45 (Trigger Number 346779932)  from it 
cover 3-sigma error-box. The detailed map of a covering is available here 
http://master.sai.msu.ru/static/GRB/Amur/FERMI/Amur.grb_1_235392.png and 
on following table 1

  Table 1. Synchronous GRB observations
   ID_CAM ID_SET    RA. [deg]    Dec.[deg]  Limit Exptime
   29009  21381    21.566667    21.999722   11.5    5.00
  100627   3913    15.201755    18.989718   11.5    5.00



  MASTER-2 and MASTER VFW  pointed to  GRB111228.45  54 sec  after the 
trigger time and 24 sec  after the notice time. The MASTER-2 (FOV=4 
sq.deg.) first image upper limit is 15. 7 .
MASTER  VWF cover 1 and 3 sigma errorboxes.The detailed map of a covering is available here 
http://master.sai.msu.ru/static/GRB/Amur/FERMI/Amur.grb_2_235392.png and 
on following table 2:

  Table 2. GRB follow up observations.
  ID_CAM ID_SET    RA. [deg]    Dec.[deg]  Limit Exptime
   29009  21382   346.616940     9.675031   11.2    5.00
  100627   3914   335.179167    10.132500   11.2    5.00



The reduction is continuated.

The message may be cited.