GCN Circular 15932
Subject
GRB 140304A: MASTER OT light curve
Date
2014-03-05T18:41:37Z (10 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
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
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)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Tunka was pointed to the GRB140304A (Evans et. al GCN 15915)
26 sec after notice time and 77 sec after trigger
time at 2014-03-04 13:23:49 UT. We detect OT (Gorbovskoy et. al GCN
15914) in two polarization bands during ~1 h while the source was brighter
than our upper limit.
The preliminary photometry result available in table 1 and here
http://master.sai.msu.ru/static/GRB/grb140304A.png .
Table 1. Preliminary early GRB140304A observations.
T_start(JD) T_trig-T_mid Exptime Mag1 Mag2 Coadd
2456721.05834 82 10 16.8 16.2 -
2456721.05931 172 30 17.2 16.9 -
2456721.06073 294 50 18.0 17.6 -
2456721.06142 358 120 18.1 17.6 2
2456721.06211 413 70 18.3 18.0 -
2456721.06724 894 580 18.5 18.5 4
2456721.08121 2070 1080 19.6 19.0 6
2456721.09812 3526 1080 19.9 19.4 6
Mag1 and Mag2 - Magnitude in two perpendicular polarizations.
The power low index alpha is 0.77+-0.05 (F ~ t-apha).
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Blagoveschensk was pointed to the GRB140304A 5 sec after
notice time and 46 sec after trigger time at 2014-03-04 13:23:17 UT.
The observations on this site made on bad weather conditions and on high
zenith distance. The 5-sigma upper limit On our first (10s exposure) image
has been about 13.0 mag.
The message may be cited.
