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GCN Circular 11960

Subject

GRB 110422A: MASTER earlier OT polarization observations

Date

2011-04-22T21:09:53Z (14 years ago)

From

Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>

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

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

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

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

V.Yurkov, Yu.Sergienko, D.Varda, I.Kudelina
Blagoveschensk Educational State University, Blagoveschensk

  MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Tunka (Baykal lake) was pointed to the  GRB 110422A 34 sec 
after notice time and 53 sec after GRB time at 2011-04-22 15:42:48.507 UT. 
On our first (10s exposure) double  set we  found optical transient 
within SWIFT error-box (Palmer et al.11959). The position coincided with 
Elunko et al. GCN 11958Loading...
 
 .
The polarizated magnitude in R band is  ~16.5+-0.4 .
We see  OT on all next images in both polarizations.
Is seems some brightenning during first minutes.
The reduction is continuated.
  The message may be cited.