GCN Circular 7037
Subject
GRB071101: Optical and NIR upper limits by KANATA
Date
2007-11-02T13:46:56Z (17 years ago)
From
Makoto Uemura at Hiroshima U <uemuram@hiroshima-u.ac.jp>
M. Uemura, 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 071101 (GCN Circ. 7030) with TRISPEC attached to
the "KANATA" 1.5-m telescope.
Our images cover about 70% of the south region of the BAT errorbox,
in which the nearby galaxy reported in GCN Circ. 7031 is not
included and the region of the XRT error circle (GCN Circ. 7034)
is included.
No fading source or afterglow candidate can significantly
be detected in the XRT error circle.
Upper limits of magnitude were estimated from neighbor
USNO B1.0 stars and 2MASS sources, shown below:
time(UT) time after the burst lim. mag. exposure_time
1 Nov. 2007 (sec) (sec)
17:57:36 229 19.7(V) 30
17:57:33 226 17.0(J) 24
17:57:27 220 14.8(Ks) 12
18:16:25 1358 20.8(V) 123
18:16:24 1357 18.0(J) 120
18:16:16 1349 15.5(Ks) 108