TITLE:   GCN CIRCULAR
NUMBER:  19489
SUBJECT: GRB160601A: Kanata Telescope I- and Ks-bands upper limits
DATE:    16/06/02 13:51:17 GMT
FROM:    Michitoshi Yoshida at HASC,Hiroshima U  <yoshidam@hiroshima-u.ac.jp>

T. Nakaoka, Hirochi, J., Yoshida, M. and Kawabata, K. S. (Hiroshima
Univ.) report on behalf of the OISTER collaboration

We performed I and Ks bands imaging observations around the error
circle of GRB 160601A (Kocevski et al., GCNC 19478) with the optical
infrared simultaneous camera HONIR attached to Kanata telescope of
Hiroshima University. We started the observations at 2016-06-01 16:42
UT. We did not find any optical-infrared counterpart of the burst. Five
sigma upper limits (Vega magnitude) are listed below.

# T0+[day]  MID-UT    T-EXP(I)   T-EXP(Ks)     I      Ks
-----------------------------------------------------------
0.08249     17:25:14    4025s      3500s     >20.6   >17.0
-----------------------------------------------------------
T0+ : Elapsed time after the burst [day]
T-EXP: Total Exposure time [sec]