GCN Circular 15176
Subject
GRB 130903A: MASTER early optical limit
Date
2013-09-04T10:07:29Z (11 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
E. Gorbovskoy, V. Lipunov, D. Denisenko, V. Kornilov, A.
Kuznetsov, D. Kuvshinov, N. Tyurina, N. Shatskiy, P. Balanutsa, D.
Zimnukhov, V.V. Chazov
Lomonosov Moscow State University, Sternberg Astronomical Institute
A. Tlatov, A.V. Parhomenko, D. Dormidontov, V. Sennik
Kislovodsk Solar Station of the Pulkovo Observatory
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
V. Krushinski, I. Zalozhnich, A. Popov, A. Bourdanov, A. Punanova
Ural Federal University
H. Levato and C. Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
C. Mallamaci, C. Lopez and F. Podest
Observatorio Astronomico Felix Aguilar (OAFA)
MASTER II robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Kislovodsk was pointed to the GRB130903A 240 sec after notice
time and 244 sec after GRB time at 2013-09-03 00:51:36 UT in two
polarizations. Some delay was due to weather condition. On our first (40s
exposure) set we haven`t found optical
transient within INTEGRAL error-box (S.Mereghetti et. al. GCN-15169 ).
The 5-sigma upper limit has been about 15.0 mag in each of polarization.
On best coadd image (with use of the first 12 sets on 6 in each of
polyarization) with total exposition 900 sec and middle time 504 after
GRB time upper limit is 17.5 mag.
More detailed information in the following table:
T_start T_finish T_mid t_mid-t_trig Exptime Filter Limit Coadd
---------------------------------------------------------------------------
00:51:36 00:52:16 00:51:36 264 s 40 s P| 15.0 no
00:51:36 00:52:16 00:51:36 264 s 40 s P- 15.0 no
00:51:36 00:52:16 00:51:36 264 s 80 s P| + P- 15.5 2
00:51:36 01:00:16 00:55:56 504 s 450 s P| 17.0 6
00:51:36 01:00:16 00:55:56 504 s 450 s P- 17.0 6
00:51:36 01:00:16 00:55:56 504 s 900 s P| + P- 17.5 12
P- and P| is a RA and DEC orientated polaroids.
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