{
  "bibcode": "2020GCN.26860....1L",
  "body": "X. Liu, D. Xu, H.J. Wang, Z.P. Zhu, B.Y. Yu (NAOC) report:\n\nWe observed the field of GRB 200122A (Sonbas et al., GCN 26844) using \nthe Xinglong-2.16m telescope equipped with the BFOSC camera. \nObservations started at 22:14:52 UT on 2020-01-22 (i.e., 20.57 h after \nthe BAT trigger), and 5x200 s R-band frames have been obtained.\n\nNo optical afterglow is detected at the Swift XRT's position in our \nstacked image, down to a limiting magnitude of m(R) ~ 22.0, calibrated \nwith the nearby PanSTARRS field.",
  "circularId": 26860,
  "createdOn": 1579742641000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 200122A: Xinglong-2.16m optical upper limit",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 200122A"
}