[vsnet-grb-info 16408] GRB 150413A: MASTER bright OT detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17689
SUBJECT: GRB 150413A: MASTER bright OT detection 
DATE:    15/04/13 14:21:11 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

K.Ivanov, S.Yazev, N.M.Budnev, O.Gres, O.Chuvalaev, V.A.Poleshchuk
Irkutsk State University

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

D.Buckley, S. Potter, A.Kniazev, M.Kotze
South African Astronomical Observatory


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


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 
Tunka was pointed to the  GRB150413A (Markwardt et al. GCN 17688) 
132 sec  after trigger time at 2015-04-13 13:57:10 UT in two 
polarizations.

We see bright OT at:

RA, Dec = 12 41 41.98   +71 50 28.0
Mag = 16.1 (unfiltered 0.2B +0.8R UsnoB1)

The discovery image is available at
https://master.sai.msu.ru/static/OT/grb150413A.jpg
The message may be cited.