{
  "bibcode": "2020GCN.27081....1X",
  "body": "D. Xu, Z.P. Zhu, X. Liu, B.Y. Yu, Y. Ma (NAOC), X. Gao (Urumqi No.1 \nSenior High School) report:\n\nWe observed the field of GRB 200215A (Bernardini et al., GCN 27079) \nusing the NEXT 0.6m optical telescope located at Nanshan, Xinjiang, \nChina. Observations automatically started at 14:40:59 UT on 2002-02-15, \ni.e., 88 s after the BAT trigger. We obtained 3x40 s,  4x60 s, and 5x90 \ns frames in the Sloan r-filter. Observations then ended due to \nfollow-ups of LIGO/Virgo S200213t.\n\nNo optical afterglow is detected in our images at the XRT position \n(Bernardini et al., GCN 27079) down to a limiting magnitude of r~18.0, \ncalibrated with the nearby PanSTARRS field.",
  "circularId": 27081,
  "createdOn": 1581782890000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 200215A: Nanshan/NEXT optical upper limit",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 200215A"
}