GCN Circular 40338
Subject
GRB 250502A: KAIT optical observations
Date
2025-05-04T08:20:51Z (13 hours 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 SVOM GRB 250502A (Wang
et al., GCN 40313) starting at 08:58, May 02 UT, about 12 minutes
after the burst. Observations were performed in 3 x 3 tiling mode,
a set of clear (roughly R) filter images were obtained. We detected
the optical afterglow (Rakotondrainibe et al., GCN 40315; An et al.,
GCN 40319; Li et al., GCN 40320; Gosh et al., GCN 40322; de Ugarte
Postigo et al., GCN 40328; Perez-Fournon et al., GCN 40330; Odeh &
Guessoum, GCN 40331; Bochenek & Perley, GCN 40333; Corcoran et al.,
GCN 40334 and Leonini et al., GCN 40337), which decayed from
17.4 +/- 0.1 mag (Vega) at 963s to 18.7 +/- 0.2 mag at 7.6ks after
the burst.