E. Gorbovskoy, V. Lipunov, V.Kornilov, A.Belinski, N.Shatskiy, N.Tyurina,
D.Kuvshinov, P.Balanutsa, V.V.Chazov, P.V.Kortunov, A.Kuznetsov
Sternberg Astronomical Institute, Moscow State University
Irkutsk State University
A. Tlatov, A.V. Parhomenko,
Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalognih, T.Kopytova
Ural State University, Kourovka
There are 6 MASTER Very Wide Field cameras located at Kislovodsk and Irkutsk
with common FOW = 2000 + 1680 square degrees (http://observ.pereplet.ru/).
Four MASTER Very Wide Field Cameras located at Kislovodsk
(4 Carl Zeiss Planar T* 85/1.4 ZF, 4x420 square degrees, 11 Mpx, 22" per
pix with 4 polarizers) responded to
the bright GRB 090820 (Fermi TRIGGER_NUM:272421498, V. Connaughton, GCN
9829), producing images beginning 9 s after the GRB Time (first alert notice).
We took 1300 images with 5 sec exposition in different polarizations.
Individual images have limiting magnitudes~11.
Our unfiltered images are calibrated relative to Tycho stars (V) and very close
to V band.
Other observations are required for independ error box elaboration.
The reduction is continued.
The message may be cited.