[vsnet-grb-info 11243] GRB111210A: MITSuME Okayama J-band upper-limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  12655
SUBJECT: GRB111210A: MITSuME Okayama J-band  upper-limit
DATE:    11/12/10 22:48:20 GMT
FROM:    Kenshi Yanagisawa at OAO/NAOJ  <yanagi at oao.nao.ac.jp>

Kenshi Yanagisawa, Daisuke Kuroda, Yasuhiro Shimizu, Kiichi Okita
(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 GRB111210A (Siegel et al, GCN12650, Stamatikos
et al, GCN12651) in J-band with a wide-field NIR camera at Okayama
Astrophysical Observatory (Japan). The camera has an effective aperture
of 0.91m.

Observations started from 17:59 UT on 10th December, 3.37 hours after
the BAT trigger, to 19:35 UT.  The total exposure of 73 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., GCNC 12652) down to limiting
magnitude of  J=16.0 (Vega, S/N=10). The photometric calibration was
made against 2MASS field stars.

T0+[s]      MID-UT     T-EXP[sec]      J
---------------------------------------------------
 +15,000   18:47          4,380       >16.0(S/N=10)
---------------------------------------------------
T0+ : Elapsed time after the burst [sec]
T-EXP: Total Exposure time [sec]