[vsnet-grb-info 12611] GRB 121117A: MASTER prompt optical limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13971
SUBJECT: GRB 121117A: MASTER  prompt optical limit 
DATE:    12/11/18 07:56:13 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at 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, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, D.Denisenko, 
A.Sankovich
Sternberg Astronomical Institute, Moscow State University

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

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

V.Krushinski, I.Zalozhnih,  A. Popov
Ural Federal University, Kourovka

Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

Claudio Mallamaci, Carlos Lopez and Federico Podest
Observatorio Astronomico Felix Aguilar (OAFA)


MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in Blagoveschensk was pointed to the  GRB121117A 47 sec after 
GRB time at 2012-11-17 08:51:43.208 UT. On our first (10s exposure) set we 
haven`t found optical transient  within SWIFT error-box (Cummings et 
al., GCN Circ.  13967).

The 5-sigma upper limit has been about 13.7 mag

This is the prompt limit because our observations was done during 
Gamma-ray activity (Cummings et al., GCN Circ.  13970).

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