GCN Circular 13792
Subject
GRB 120919B: MASTER prompt optical observations
Date
2012-09-21T13:54:00Z (12 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
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)
E. Gorbovskoy, V. Lipunov, V. Kornilov, D. Denisenko, A. Kuznetsov,
D. Kuvshinov, A. Belinski, 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
Ural Federal University
MASTER-ICATE robotic Very Wide Field Cameras (FOV=2x384 square degrees,
D=72mm, f/1.2, 1 pix = 22 arcsec, http://observ.pereplet.ru) located in
Argentina (Observatorio Astronomico Felix Aguilar,
http://93.180.27.230:8080/) were pointed to the GRB120919B by FERMI
369710066 trigger 30 s after notice time and 55 s after GRB time at
2012-09-19 01:15:18 UT.
We cover full IPN-triangulations error-box (K. Hurley et. al. GCN13788)
We haven`t found optical transient within IPN-triangulations error-box
our first (5 s exposure) set and on coadd image with complete exposure
of 45 seconds durnig gamma-burst activity (Golenetskii et al., GCN 13789).
The 5-sigma upper limit on single image has been about 11.7 mag and 12.5
mag on coadded image.
Also, we are marginaly see ~2 sigma OT at position Ra 20:10:26.40 Dec
+37:31:48.00 with magnitude 12.5+-0.5m .
The coverage map and OT image available here
http://master.sai.msu.ru/static/GRB/GRB120919B_2x2deg.png
Our cameras are continuously imaging the sky with 5 sec exposures.
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