GCN Circular 40065
Subject
GRB 250403A: KAIT optical observations
Event
Date
2025-04-04T18:53:09Z (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 GRB 250403A (Julakanti
et al., GCN 40026; Fermi GBM team, GCN 40025) with a set of
120x60s images in the clear (roughly R) filters, at a mid time
of 16.0 hours after the trigger. We marginally detected the optical
afterglow (Starling et al., GCN 40028; Wu et al., GCN 40029;
Du et al., GCN 40031; Li et al., GCN 40032, Julakanti et al.,
GCN 40034; Ghosh et al., GCN 40039; Jiang et al., GCN 40041;
Pérez-Fournon et al., GCN 40043; Brivio et al., GCN 40044;
Xin et al., GCN Circ. 40045) in the coadd image with a brightness
of 21.2 +/- 0.4 mag (Vega).