{
  "bibcode": "2020GCN.27161....1X",
  "body": "D. Xu, X. Liu, Z.P. Zhu, B.Y. Yu, Y. Ma (NAOC), X. Gao (Urumqi No.1 \nSenior High School) report:\n\nWe observed the field of the possible X-ray afterglow by Swift/XRT \n(Burrows et al., GCN 27157) of GRB 200219C detected by Fermi/GBM and \nFermi/LAT (GCN 27145; Dirirsa et al., GCN 27151), using the 0.6m NEXT \ntelescope located at Nanshan, Xinjiang, China. Observations started at \n22:45:55 UT on 2020-02-20 (i.e., 22.8 h after the Fermi trigger) and \n10x300 s Sloan r-band frames were obtained.\n\nNo optical counterpart is detected in our stacked image at the Swift XRT \nposition, down to a limiting magnitude of r~21.0.\n\nInspection of PanSTARRS reveals a faint, extended source within the XRT \nerror circle. It's localized at coordinates: R.A. (J2000) = 17:30:02.21, \nDec.(J2000) = +10:32:22.69, and has r = 22.70 +/- 0.15 mag. Thus is may \nbe the host galaxy of the GRB, if the Swift XRT detection is the \nafterglow of the GRB.",
  "circularId": 27161,
  "createdOn": 1582262146000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 200219C: Nanshan/NEXT optical upper limit and possible host galaxy from PanSTARRS",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 200219C"
}