{
  "circularId": 44065,
  "createdOn": 1774075793000,
  "bibcode": "2026GCN.44065....1Z",
  "subject": "GRB 260310A / AT 2026fgk: KAIT optical observations",
  "body": "WeiKang Zheng (UCB) and Alexei V. Filippenko (UCB) report on\n\nbehalf of the KAIT GRB team:\n\n\nThe 0.76-m Katzman Automatic Imaging Telescope (KAIT), located at\n\nLick Observatory, observed the field of GRB 251022A (Fermi GBM\n\nTeam, GCN 43951; Salunke et al., GCN 43958) on March 13, 14, 18\n\n19, 20 UT. A set of B, V, R, I and clear (roughly R) filter images\n\nwere obtained. We clearly detected the optical afterglow (O'Neill\n\net al. 2026, TNS Discovery Report 294132; Konno et al., GCN 43974;\n\nHinds et al., GCN 43977; Lipunov et al., GCN 43978;Martin-Carrillo\n\net al., GCN 43979; Méndez et al., GCN 43980;de Ugarte Postigo\n\net al., GCN 43984; Hsu et al., GCN 43986; Pursiainen et al., GCN\n\n43990; Becerra et al., GCN 43991; Li et al., GCN 43993; Jayaraman\n\net al., GCN 43994; Stein et al., GCN 43996;Martin-Carrillo et al.,\n\nGCN 44000; Moreno Méndez et al., GCN 43980; Becerra et al., GCN\n\n43991; Li et al., GCN 43993; Stein et al., GCN 43996; Watson et al.,\n\nGCN 44001; Lai et al., GCN 44002; Izzo et al., GCN 44003; Brivio\n\net al., GCN 44004; Moskvitin et al., GCN 44006; Romanov, GCN 44020;\n\nBrosio et al., GCN 44021; Pawar et al., GCN 44022; Belkin et al.,\n\nGCN 44043; Li et al., GCN 44044; Gupta et al., GCN 44051; Salunke\n\net al., GCN 43958; Becerra et al., GCN 44059; Volnova et al., GCN\n\n44060; Busmann et al., GCN 44061) in our coadd images and photometry\n\nin R band gives the following result:\n\n\nt-t0(d) Mag    err\n\n------------------\n\n3.21    17.98  0.03\n\n4.25    18.31  0.02\n\n8.24    18.34  0.02\n\n9.22    18.30  0.02\n\n10.20   18.54  0.03\n",
  "submitter": "Weikang Zheng at UC Berkeley <weikang@berkeley.edu>",
  "eventId": "GRB 260310A",
  "submittedHow": "email"
}