GCN Circular 15983
Subject
GRB 140311C: MASTER optical observations
Date
2014-03-14T15:01:38Z (11 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
E. Gorbovskoy, V. Lipunov, M. Pruzhinskaya, D.Denisenko, V.Kornilov,
N.Tyurina, P.Balanutsa, A.Kuznetsov, V.V.Chazov, D.Kuvshinov
Lomonosov Moscow State University, Sternberg Astronomical Institute
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
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
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)
As previously reported (Yurkov et. al. GCN 15981) MASTER VWF robotic very
wide field cameras (FOV=2x384 square degrees, D=72mm, f/1.2, 1 pix = 22
arcsec) installed on MASTER-II robotic telescope in Tunka covered full
FERMI GBM error-box (M. Stanbro, GCN15977) before, during and after GRB.
We haven`t found credible optical transient with 3-sigma upper limit
10.5m.
We also didn't find credible optical counterpart on the survey (Yurkov et.
al. GCN 15981) of part of error box carried out directly after GRB on
MASTER-II robotic telescope up to 18 mag.
The synchronous move of FERMI GBM error-box available here
http://master.sai.msu.ru/static/GRB/GRB140311C_FERMI.gif
http://master.sai.msu.ru/static/GRB/GRB140311C_diff.gif
The circle on move is the Fermi GBM 1 sigma+3 degrees systematic error
box.
Also very wide field cameras covered a place of possible iPTF
counterpart (Singer et. al. GCN 15971).
Unfortunately the bright star is projected into OT place. We didn't find a
noticeable brightening of this star.
The syncronous move from very wide field cameras of possible iPTF
counterpart place available here
http://master.sai.msu.ru/static/GRB/GRB140311C_IPTF.gif
This place was not covered on MASTER-II survey.
The Prompt Optical to Gamma Fluence Ratio during this burst is:
F_opt/F_gamma <~ 1 : 820.
The covarege map is available at
http://master.sai.msu.ru/static/GRB/GRB140311C_map1.png .
The message may be cited.