GCN Circular 41587
Subject
EP-WXT trigger 01709200800 : KAIT optical observations
Date
2025-08-29T06:20:25Z (3 months ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
Via
email
WeiKang Zheng (UCB), Xuhui Han (NAOC), Pinpin Zhang (NAOC) and
Alexei V. Filippenko (UCB) report on behalf of the KAIT GRB team:
The 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at
Lick Observatory, observed the field of EP-WXT trigger 01709200800
(Ni et al., GCN 41561) starting at 11:39, Aug 27 UT, about 17
minutes after the trigger. A set of clear (roughly R) filter images
were obtained and lasted for ~70 minutes. We performed the photometry
on the suggested flare star LSPM J0220+3320 and saw some variation in
the magnitude, which faded from 11.92 +/- 0.03 mag to 11.99 +/- 0.03
mag during our observation. The field was observed again on the
following night at ~21.98 hours and lasted for ~2 hours. We saw similar
variation in magnitude but in rising phase, suggesting it is a variable
star.