TITLE:   GCN CIRCULAR
NUMBER:  16957
SUBJECT: GRB 141026A: MASTER early optical observations 
DATE:    14/10/26 12:24:38 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc@observ.inetcomm.ru>

E. Gorbovskoy, V. Lipunov, M.Pruzhinskaya,  V.Kornilov, D.Kuvshinov, N.Tyurina, 
P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Denisenko
Lomonosov Moscow State University,
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, A. Gabovich
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  GRB141026A 22 sec after notice time and 99 sec 
after trigger time at 2014-10-26 02:38:31 UT in two polarizations. On our first 
single and coadd images we haven`t found optical transient  within SWIFT 
error-box (Hagen et. al. GCN 16950). The 5-sigma upper limit has been about 
16.5 on single (20s exposure) and 17.5 on coadd image (from first 3 images with 
total exposure 80 sec). The message may be cited.

The publication delay was due to time zone changes during this night.

This message may be cited.