GCN Circular 15960
Subject
GRB 140311B: final MASTER OT light curve
Date
2014-03-12T10:53:33Z (10 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University
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
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 GRB140311B (Racusin et al., GCN
15945) 29 sec after notice time and 107 sec after trigger time (Gorbovskoy
et. al GCN 15948 ) and made observations during ~ 1.5 h before sunrise.
We see OT (Xu et. al. GCN 15949) only on several coadditional images. On
all of them the object is close to limit and has s/n from 3 to 6.
Our preliminary ligth curve available in table below and on image here
http://master.sai.msu.ru/static/GRB/grb140311B.png.
T_start T_t-T_m Exptime Mag. Coadd
[s] [s] [m]
21:17:12 326 220 19.4 4
21:18:18 432 300 19.0 4
21:16:16 557 650 19.4 8
21:19:44 557 380 18.7 4
21:19:44 661 550 18.9 5
21:21:19 708 490 18.9 4
21:18:18 834 960 19.4 8
21:25:40 1485 1380 19.8 8
21:25:40 1702 1740 20.0 10
T_t is GRB trigger time, T_m is middle time of our exposure.
Our unfiltered magnitude is well described by a parity 0.8R + 0.2B (USNO
B1)
The power low index alpha from 380 to 1740 seconds after the trigger is
1.07+-0.10 (F ~ t-apha).
We also apologize for an error in the title of our previous telegram (GCN
15948) if it misled somebody.
The message may be cited.
