GCN Circular 18819

Subject

GRB 160104A: MITSuME Okayama Ks-band upper-limit

Event

Date

2016-01-04T14:10:03Z (10 years ago)

From

Kenshi Yanagisawa at OAO/NAOJ <yanagi@oao.nao.ac.jp>

K. Yanagisawa, D. Kuroda, Y. Shimizu, H. Izumiura(OAO/NAOJ),
M. Yoshida (Hiroshima), K. Ohta(Kyoto) and N. Kawai(Tokyo Tech.)
report on behalf of the MITSuME collaboration:

We observed the field of GRB 160104A (Melandri et al., GCN 18815Loading...
 
 )
in Ks-band with a wide-field near infrared imager at Okayama
Astrophysical Observatory (Japan).  The imager has effective
aperture of 0.91 m.

Observations started from 11:46 UT on 4th January, 0.38h after
the BAT trigger, to 12:49 UT. The total exposure of 24.0 min
was successfully obtained.

In our co-add image, we did not find any new point source within
the XRT error circle down to the limiting magnitude of
Ks=16.8 (Vega, S/N=3). The photometric calibration was made
against 2MASS field stars.

T0+[sec]    MID-UT     T-EXP[sec]      Ks
---------------------------------------------------
  +3,235    12:18      1440.0          >16.8
---------------------------------------------------
T0+ : Elapsed time after the burt [sec]
T-EXP: Total Exposure time [sec]