GCN Circular 18408
Subject
GRB 151006A: MITSuME Okayama Ks-band upper-limit
Date
2015-10-07T02:58:46Z (9 years ago)
From
Kenshi Yanagisawa at OAO/NAOJ <yanagi@oao.nao.ac.jp>
Kenshi Yanagisawa, Daisuke Kuroda, Yasuhiro Shimizu,
Hideyuki Izumiura(OAO/NAOJ), Michitoshi Yoshida (Hiroshima-U),
Kouji Ohta(Kyoto-U) and Nobuyuki Kawai(Tokyo Tech.) report
on behalf of the MITSuME collaboration:
We observed the field of GRB151006A (Kocevski et al., GCN 18398)
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 17:22 UT on 6th October, 7.4h after
the BAT trigger, to 18:17 UT. The total exposure of 26.5 min
was successfully obtained.
In our co-add image, we did not find any new point source within
the enhanced XRT error circle (Goad et al., GCN 18403) down
to limiting magnitude of Ks=15.2 (Vega, S/N=10). The photometric
calibration was made against 2MASS field stars.
T0+[sec] MID-UT T-EXP[sec] Ks
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+26,819 17:49 1,590 >15.2
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T0+ : Elapsed time after the burt [sec]
T-EXP: Total Exposure time [sec]