[vsnet-grb-info 11527] GRB 120211A: MITSuME Okayama Ks-band upper limit
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sun Feb 12 01:11:52 JST 2012
TITLE: GCN CIRCULAR
NUMBER: 12923
SUBJECT: GRB 120211A: MITSuME Okayama Ks-band upper limit
DATE: 12/02/11 16:11:45 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 GRB120211A (Sonbas et al., GCNC 12920) in
Ks-band with a wide-field NIR camera at Okayama Astrophysical
Observatory (Japan). The camera has an effective aperture of 0.91m.
Observations started from 12:08 UT on 11th Feburuary, 10.1 min after
the BAT trigger, to 13:22 UT. The total exposure of 60 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 12922) down to limiting
magnitude of Ks= 15.5(Vega, S/N=3). The photometric calibration was
made against 2MASS field stars.
T0+[min] MID-UT T-EXP[min] Ks
---------------------------------------------------
+47.1 12:45 60.0 >15.5 (S/N=3)
---------------------------------------------------
T0+ : Elapsed time after the burst [sec]
T-EXP: Total Exposure time [sec]
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