[vsnet-grb-info 14432] GRB 140103A: MASTER-Net early OT detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15746
SUBJECT: GRB 140103A:  MASTER-Net early OT detection
DATE:    14/01/16 15:20:24 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <gcncirc at observ.inetcomm.ru>

E. Gorbovskoy,  V. Lipunov, D.Denisenko, V.Kornilov, D.Kuvshinov, N.Tyurina, 
P.Balanutsa,  A.Kuznetsov
Lomonosov  Moscow State University, Sternberg Astronomical Institute

A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory

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

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 Kislovodsk was pointed to the SWIFT GRB 140103A (V. Mangano et. 
al. GCN 15656) 22 sec after notice  time and 303 sec after trigger time at 
00:35:54 UT (Gorbovskoy et al., GCN 15660).
We finaly processed our data and found faint optical afterglow on ours 
coadd images starting from t_0 + 303 sec (exp=240 sec) the position 
reported by Volnova et. al. ( GCN 15744).
The afterglow have a local maximum near 1560 sec after the burst, which, 
in the principle, can be result of long  plato-like X-ray activity.

Out photometry data available at table below.

t_start     t_mid   t_finish  t-t0   Exp.    Mag.  S/N coadd
--------+----------+---------+------+-----+-------+---+-----
00:35:45  00:36:45  00:37:59   458    240   19.4   3.6    3
00:35:45  00:36:45  00:41:50   689    670   20.2   2.6    6
00:40:24  00:42:24  00:44:09   828    430  <20.7   ---    3
00:38:33  00:40:13  00:44:50   869    710   20.3   3.0    5
00:51:29  00:54:29  00:56:23  1562    540   19.8   4.3    3
00:48:06  00:51:06  00:58:08  1667   1080   20.2   3.8    6
01:08:39  01:11:39  02:11:41  6080   6660   22.0   2.5   37

The light curve available here 
http://master.sai.msu.ru/static/GRB/GRB140103A.png


The message may be cited.