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GCN Circular 15238

Subject
Fermi Trigger 401326696: MASTER prompt optical observations
Date
2013-09-21T12:42:39Z (11 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, A. Punanova
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/) 
synchronously observed 35% part of FERMI GRB130919A (trigger 401326696) 
error box before, during and after the trigger.

Since 40 sec after the trigger cameras pointed to FERMI alert our FOV 
cover 95% part of error box.
We haven`t found optical transient  within
FERMI error-box  our first (5 s exposure) set.
The 5-sigma upper limit has been about 12.0 mag.
The 5-sigma upper limit on coadd first 30 images is about 13.0 mag.

The first seconds  movie locate here 
http://master.sai.msu.ru/static/GRB130919A.gif

Our cameras are continuously imaging the sky with 5 sec exposures.

The more accurat error box (by IPN) is requied.
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