GCN Circular 16487
Subject
GRB140629A: Kanata/HOWPol optical observation
Date
2014-06-29T23:33:24Z (11 years ago)
From
Koji Kawabata at HASC,Hiroshima U <kawabtkj@hiroshima-u.ac.jp>
K. Takaki, T. Nakaoka, Y. Moritani, K. S. Kawabata (Hiroshima Univ.) report
on behalf of Kanata team:
We performed a series of optical imaging polarimetry for the optical
afterglow of GRB140629A (Yurkov et al., GCN 16478, Xin et. al GCN 16480,
Bikmaev et al., GCN 16482) from 73 sec after the Swift/BAT trigger
(Lien et al., GCN 16477) with HOWPol attached to the 1.5-m Kanata telescope
at Higashi-Hiroshima Observatory, Japan.
Calibrated with USNO-B1 catalogue, our quick-look photometry indicates that
the R-band magnitude of the optical afterglow was 14.0 at the beginning of
our observation, reached its peak brightness of 13.3 mag around 160 sec,
and then smoothly declined. Further analysis is ongoing.