{
  "subject": "GRB 250314A: Keck/NIRC2 J-band upper limit",
  "submitter": "Weikang Zheng at UC Berkeley <weikang@berkeley.edu>",
  "body": "WeiKang Zheng, Alexei V. Filippenko (UC Berkeley), Chris Fassnacht,\n\nPrayaag Katta (UC Davis), D. B. Malesani (DAWN/NBI) and Jing Wang (NAOC),\n\nreport on behalf of the KAIT GRB team:\n\n\nWe observed the field of the SVOM GRB 250314A (Wang et al., GCN 39719)\n\nwith the NIRC2 camera on the Keck II 10 m telescope. The observations\n\nwere performed in the J band (without AO) starting on 2025 March 16 at\n\n12:54:21 UTC (i.e., 2.0 days after the burst), and consisted of 2x120 s\n\nexposures. At the reported NIR afterglow position (Malesani et al.,\n\nGCN 39727; Malesani et al., GCN 39732), we do not detect any counterpart\n\nwith an upper limit of J > 19.4 mag (Vega).\n",
  "createdOn": 1742540125002,
  "eventId": "GRB 250314A",
  "submittedHow": "email",
  "bibcode": "2025GCN.39797....1Z",
  "circularId": 39797
}