[vsnet-grb-info 15711] GRB 141031B: MASTER early optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16999
SUBJECT: GRB 141031B: MASTER early optical observations
DATE:    14/10/31 15:23:47 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

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

E. Gorbovskoy, V. Lipunov,  M.Pruzhinskaya, V.Kornilov, D.Kuvshinov, 
N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov, A.Kuznetsov, V.V.Chazov, 
D.Denisenko, A.Sankovich
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University

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

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

V.Krushinsky, I.Zalozhnih,  A. Popov
Ural Federal University, Yekaterinburg, 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 Tunka was pointed to the  GRB141031B 33 sec after notice time 
and 88 sec after trigger time at 2014-10-31 14:58:13 UT in two 
polarizations. On our first (20s exposure) set we haven`t found optical 
transient  within SWIFT error-box (Gompertz et al GCN 16998).
The 5-sigma upper limit has been about 16.0 mag

MASTER II  robotic telescope located in Kislovodsk was pointed  to the 
GRB141031B 23 sec after notice time and 77 sec after trigger time at 
2014-10-31 14:58:03 UT in two polarizations. On our first (20s exposure) 
set we haven`t found optical transient  within SWIFT error-box. The 
5-sigma upper limit has been about 15.5 mag.

The message may be cited.