GCN Circular 16629
Subject
GRB 140723A: MASTER optical observation
Date
2014-07-24T13:49:03Z (11 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
E. Gorbovskoy, D.Denisenko, V. Lipunov, M.Pruzhinskaya, V.Kornilov,
D.Kuvshinov, A.Belinski, N.Tyurina, N.Shatskiy, P.Balanutsa, D.Zimnukhov,
A.Kuznetsov, V.V.Chazov, A.Sankovich
Lomonosov Moscow State University,
Sternberg Astronomical Institute, Moscow State University
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.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 GRB 140723A (Fermi trigger 427772193)
48377 s (~13.4 h) after trigger time at 2014-07-23 15:02:47 UT directly
after sunset. Observations were made at high zenith distance (z ~ 76d)
with the error box setting to the horizon. Therefore we have only two
(180s exposure) successful images.
On our images we have not found optical transient within Fermi-LAT
error-box (Bissaldi et al. GCN 16623, Burns et. al GCN 16626) and IPN
(Hurley et al. GCN 16625, Golenetskii et. al GCN 16628) brighter than
18.3 mag. Thus we can not confirm the LCO-Sutherland OT (Guidorzi et al.
GCN 16627) despite ~2 hours earlier time of observations and our upper
limit being 1 magnitude deeper than the estimated object magnitude.
The 6x6 acrminutes MASTER-Tunka image around probable OT position (Guidorzi et
al. GCN 16627) is available here:
http://master.sai.msu.ru/static/GRB/GRB140723_LAT.png
Our white (clear) band is well described by a parity 0.8R+0.2B (USNO B1).
The message may be cited.