{
  "submitter": "liuxing@nao.cas.cn",
  "createdOn": 1780468887223,
  "body": "X. Liu, J. An, L.B. He, S.Q. Jiang, Z.P. Zhu, D. Xu (NAOC), S.Y. Fu (HUST), J.P.U. Fynbo (DAWN/NBI), A. M. Kadela report (NOT):\n\nWe observed the field of GRB260601B/EP260601a (Yang et al., GCN 44766; Yu et al., GCN 44767; Waratkar et al., GCN 44771; Sugita et al., 44773), using the 2.56m Nordic Optical Telescope (NOT) equipped with the NOTCam near-infrared camera. Observation started at 2026-06-03 00:53:22 UT, i.e., 29.67 hr post-burst, and 25x60s J-band frames were obtained.\n\nThe previously reported optical counterpart (Liu et al., GCN 44764; Guelfand et al., GCN 44765; Li et al., GCN 44769) was detected in our stacked image with a brightness of J = 20.7 +/- 0.1 (Vega) at a median time of 29.94 hr post-trigger, calibrated with the 2MASS catalog and not corrected for Galactic extinction.\n\nWe acknowledge the excellent support from the NOT staff, in particular A. M. Kadela.",
  "submittedHow": "web",
  "circularId": 44789,
  "format": "text/plain",
  "eventId": "GRB 260601B",
  "subject": "GRB260601B/EP260601a: NOT near-infrared observations"
}