GCN Circular 37733
Subject
EP trigger ID 01709065118: KAIT confirmation of the stellar flare
Date
2024-10-08T04:14:48Z (2 months ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
Via
legacy 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, automatically responded to the EP-WXT trigger
(ID= 01709065118; Zhou et al., GCN 37715) starting at 05:49 UT,
Oct. 05th, ~8 minutes after the trigger. A set of images with 20s
exposure time were obtained in B, V, R I and clear (roughly R)
filters. Observations lasted for about 5 hours. The flare star
1RXS J225817.2-110434, reported by Zhou et al. (GCN 37715) to be
within EP-FXT error circle, was covered by KAIT images. Photometry
of the star show that its brightness decreased from the start of
our observation in all filters, especially in B band which
decreased by 0.6 mag. The light curves became flat after about 1.5
hours after trigger in all bands. We therefore confirm that this
EP-WXT trigger event is truly associated with this stellar flare.