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GCN Circular 15390

Subject
GRB 131024B: MASTER prompt optical observation
Date
2013-10-27T11:38:44Z (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
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  GRB131024B 27 sec s after notice 
time and 36 sec after GRB time at 2013-10-24T21-36-07.864 UT. On our first 
(10s exposure) set we haven`t found optical transient  within SWIFT 
error-box (Krimm et. al GCN15371).
The 5-sigma upper limit has been about 17.2 mag.
This is the prompt observations becaus GRB duration time T_90 = 64+-22 sec 
(Baumgartner et al., GCN Baumgartner).
Such long circular delay was due to with daily power cut on observatory.
The message may be cited.
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