GCN Circular 13706
Subject
GRB 120830A: early MASTER optical limit
Date
2012-08-31T09:07:25Z (13 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
H. Levato and C. Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
C. Mallamaci, C. Lopez and F. Podest
Observatorio Astronomico Felix Aguilar (OAFA)
E. Gorbovskoy, V. Lipunov, V. Kornilov, D. Denisenko, A. Kuznetsov,
D. Kuvshinov, A. Belinski, N. Tyurina, N. Shatskiy, P. Balanutsa, D. Zimnukhov,
V.V. Chazov
Lomonosov Moscow State University, Sternberg Astronomical Institute
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. Yurkov, Yu. Sergienko, D. Varda, E. Sinyakov
Blagoveschensk Educational State University, Blagoveschensk
V. Krushinski, I. Zalozhnich, A. Popov, A. Bourdanov, A. Punanova
Ural Federal University
MASTER-ICATE robotic very wide field cameras (FOV=2x384 square degrees, D=72mm,
f/1.2, 1 pix = 22 arcsec, http://observ.pereplet.ru) located in Argentina
(Observatorio Astronomico Felix Aguilar, http://93.180.27.230:8080/) were
pointed to the FERMI GRB120830A (Vianello et al., GCN 13704) 18 s after
notice time and 44 s after GRB time at 2012-08-30 07:07:47 UT(Levato et al., GCN 13703).
We cover IPN (Hurley et al., GCN 13705) and Fermi LAT error boxes.
We haven`t found optical transient on our first (5 s
exposure) set and on coadd image made of 60 images and complete exposure of 300
seconds.
The coverage map is available
http://master.sai.msu.ru/static/GRB120830A_IPN_LAT.jpeg
The 5-sigma upper limit on single image has been about 11.0 mag and 12.0 mag
on coadd image.
Our cameras are continuously imaging the sky with 5 sec exposures.
Weather conditions were not so good (feeble cloudiness).
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