TITLE:   GCN CIRCULAR
NUMBER:  19479
SUBJECT: GRB 160601A: MASTER-Net observations
DATE:    16/06/01 15:19:26 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov@xray.sai.msu.ru>

A.Gabovich, V.Yurkov, Yu.Sergienko
Blagoveschensk Educational State University, Blagoveschensk

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

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

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

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

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

Hugo Levato and Carlos Saffe
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)

Ricardo Podesta, Claudio Mallamaci, Federico Podest, Carlos Lopez
Observatorio Astronomico Felix Aguilar (OAFA)


MASTER-Amur  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
was pointed to the  GRB160601A (Kocevski et al., GCN19478) 67 sec after 
notice time and 81 sec after trigger time at 2016-06-01 14:44:23 UT.
On our first (20s  and 70s exposures)  set we haven`t found optical 
transient  within SWIFT error-box (ra=15h 39m 44.43s dec=+64d 32' 24.2" 
r=3.3 arcsec) The 5-sigma upper limit is 17.5mag.

MASTER-Tunka  robotic telescope was pointed to the  GRB160601.61 55 sec 
after notice time and 73 sec after trigger time at 2016-06-01 14:44:16 UT, 
on the first images (20s) there is also no OT .

The message may be cited.