[vsnet-grb-info 10149] GRB 110120A: MASTER optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  11598
SUBJECT: GRB 110120A: MASTER optical observations 
DATE:    11/01/24 14:56:32 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at observ.inetcomm.ru>

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

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

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

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

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

MASTER very wide field cameras (MASTER-Net: 
http://observ.pereplet.ru, 6 cameras 11 Mpix, 85, 1/1.2. 1 sec 
exposition, comonn FOW is 2400 square degrees) 
located in  Kislovodsk was pointed to the  GRB110120A 24 sec s after 
notice time and  64 sec after GRB time at 2011-01-20 16:00:42.913 UT.
The sky near horizont is not clear. 
On our 60 coaded images  we haven`t found optical transient  within
common area of the FERMI LAT error-box  (Nicola Omodei et al., GCN Circ 
11597) and (Hurley et al., GCN 11595).

The 5-sigma upper limit has been about 10 mag (mean time = 94 sec after 
trigger).
The image is available at 
http://observ.pereplet.ru/images/GRB110120A/grb.html

The MASTER II telescopes FOW  was out 
of the  final error box and our previous results (Gorbovskoy et al., GCN 
Circ 11588) not valid.

  The observations was done at high zenith distance.

mailto: lipunov at sai.msu.ru