[vsnet-grb-info 17613] GRB 160221A: MASTER-SAAO early observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19049
SUBJECT: GRB 160221A: MASTER-SAAO early observations 
DATE:    16/02/22 10:13:47 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

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

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

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

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

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

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


MASTER II  robotic telescope (MASTER-Net: http://observ.pereplet.ru) 
located in SAAO was pointed to the  GRB160221A (Mereghetti et. al GCN 
19046) 61 sec after notice time and 74 sec after trigger time at 
2016-02-21 23:51:04 UT. On our second (10s exposure)  set we haven`t found 
optical transient  within INTEGRAL error-box (ra=15 28 19 dec=-28 26 40 
r=0.053100).
The 5-sigma upper limit has been about 16.5 mag on single (10 s images) 
and 19.0 on coadd image with total exposure 150 s.

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