TITLE:   GCN CIRCULAR
NUMBER:  12925
SUBJECT: GRB 120211A: MASTER early optical observations
DATE:    12/02/11 19:13:43 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>

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

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, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory

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

H.Levato, C.Mallamaci, C.Saffe
ICATE (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio), 
San Juan, San Juan University, Felix Aguilar Observatory, Argentina



MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in Blagoveschensk was pointed to the  GRB120211A (SWIFT trigger 
514586; Sonbas et al. GCN 12920) 77 sec after GRB 
time at 2012-02-11 11:59:45.629 UT. On our first (20s exposure) set we 
haven`t found optical transient  within SWIFT error-box (ra=05 51 00 
dec=-24 45 36 ).
The 5-sigma upper limit has been about 16.3 mag.

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