[vsnet-grb-info 14294] GRB 131224A: MASTER-Net early optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15608
SUBJECT: GRB 131224A: MASTER-Net early optical observations
DATE:    13/12/25 08:14:39 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  GRB131224A 33 sec after notice 
time and 39 sec after trigger time at 2013-12-24 16:55:24 UT in two 
polarizations.
Observations were made on high (z=75 deg) zenith distance and on the 
extremely stars rich  field (with galactic latitude  b=3 deg).
On our first (10s exposure) set we haven`t found optical transient  within 
INTEGRAL error-box (S.Mereghetti et. al. GCN 15607).
The 5-sigma upper limit has been about 15.5 mag
The message may be cited.