[vsnet-grb-info 5384] GRB 071112C: Optical and NIR afterglows
observed with KANATA
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Tue Nov 13 05:07:52 JST 2007
TITLE: GCN CIRCULAR
NUMBER: 7062
SUBJECT: GRB 071112C: Optical and NIR afterglows observed with KANATA
DATE: 07/11/12 20:07:47 GMT
FROM: Makoto Uemura at Hiroshima U <uemuram at hiroshima-u.ac.jp>
M. Uemura, M. Sasada, A. Arai, and T. Uehara (Hiroshima Univ.),
report on behalf of the KANATA GRB team:
We performed optical-NIR observations of the field of
GRB 071112C (GCN Circ. 7059) with TRISPEC attached to
the "KANATA" 1.5-m telescope.
We found a fading object at the position of the optical
afterglow detected with UVOT.
Our preliminary results are below:
time(UT) mag. exposure_time
Nov. 2007 (sec)
12.77880 17.76 +/- 0.14 V 30sec * 10
12.77911 16.39 +/- 0.22 J 25sec * 9
12.78674 18.66 +/- 0.20 V 123sec * 5
12.78672 17.16 +/- 0.17 J 120sec * 5
Comparison star:
V-band: GSC2.3 02:36:55.72 +28:21:03.7 V=14.15
J-band: 2MASS 02:36:55.72 +28:21:03.7 J=12.674
The large errors of magnitudes are due to the rapidly
fading trend of the afterglow.
Further observation and analysis are ongoing.
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