[vsnet-grb-info 12594] GRB 121108A: MASTER early prompt optical limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13954
SUBJECT: GRB 121108A: MASTER early prompt optical limit
DATE:    12/11/08 19:33:45 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at observ.inetcomm.ru>

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

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

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 Kislovodsk was pointed to the  GRB121108A (Ukwatta et. al. 
GCN13952)  36 sec after notice  time and 54 sec after GRB time at 
2012-11-08 17:48:33.174 UT in two  polarizations. On our first (10s 
exposure) set we haven`t found optical transient  within SWIFT  error-box.
The 5-sigma upper limit has been about 15.8 mag
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