GCN Circular 44065
Subject
GRB 260310A / AT 2026fgk: KAIT optical observations
Event
Date
2026-03-21T06:49:53Z (a month ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
Via
email
WeiKang Zheng (UCB) 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 251022A (Fermi GBM
Team, GCN 43951; Salunke et al., GCN 43958) on March 13, 14, 18
19, 20 UT. A set of B, V, R, I and clear (roughly R) filter images
were obtained. We clearly detected the optical afterglow (O'Neill
et al. 2026, TNS Discovery Report 294132; Konno et al., GCN 43974;
Hinds et al., GCN 43977; Lipunov et al., GCN 43978;Martin-Carrillo
et al., GCN 43979; Méndez et al., GCN 43980;de Ugarte Postigo
et al., GCN 43984; Hsu et al., GCN 43986; Pursiainen et al., GCN
43990; Becerra et al., GCN 43991; Li et al., GCN 43993; Jayaraman
et al., GCN 43994; Stein et al., GCN 43996;Martin-Carrillo et al.,
GCN 44000; Moreno Méndez et al., GCN 43980; Becerra et al., GCN
43991; Li et al., GCN 43993; Stein et al., GCN 43996; Watson et al.,
GCN 44001; Lai et al., GCN 44002; Izzo et al., GCN 44003; Brivio
et al., GCN 44004; Moskvitin et al., GCN 44006; Romanov, GCN 44020;
Brosio et al., GCN 44021; Pawar et al., GCN 44022; Belkin et al.,
GCN 44043; Li et al., GCN 44044; Gupta et al., GCN 44051; Salunke
et al., GCN 43958; Becerra et al., GCN 44059; Volnova et al., GCN
44060; Busmann et al., GCN 44061) in our coadd images and photometry
in R band gives the following result:
t-t0(d) Mag err
------------------
3.21 17.98 0.03
4.25 18.31 0.02
8.24 18.34 0.02
9.22 18.30 0.02
10.20 18.54 0.03