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GCN Circular 18877

Subject
GRB 160117B: MASTER-Amur OT observations
Date
2016-01-17T15:09:51Z (9 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V.Yurkov, Yu.Sergienko, D.Varda, E.Sinyakov
Blagoveschensk Educational State University, Blagoveschensk

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

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

V.Krushinski, I.Zalozhnih,  A. Popov
Ural Federal University, Kourovka

A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Senik
Kislovodsk Solar Station of the Pulkovo Observatory

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

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)

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias


MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in Blagoveschensk was pointed to the  GRB160117B  (Sonbas et. al. 
GCN 18875) and made first exposition 19 sec after notice time and 35 sec 
after trigger time at 2016-01-17 14:04:35 UT.
But due to some problem with mount on strong frost  (-40 deg) we have a 
~4 deg. poining error and do not cover GRB160117B error box.
We correct this error and made first (60 sec exposure) image with 
GRB160117B error box at 2016-01-17 14:21:31 i.e. 1323 sec. after the 
trigger with upper limit 17.0.
On one of coadd image (with total exposure 180 sec, 1696 sec after the 
trigger)  we see   GRB160117B optical counterpart (Sonbas et. al. GCN 
18875) with 17.5 mag.
All magnitudes are unfiltered (0.2B+0.8R) with respect to number USNO B1.0 
stars.
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