{
  "bibcode": "2019GCN.23910....1Z",
  "body": "Z.P. Zhu, D. Xu, B.Y. Yu (NAOC), J.H. Liu (XAO) report:\n\nWe observed the field of GRB 190219A (Beardmore et al., GCN 23902) using \nthe NEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained \n10x90s frames in the R filter, started at 19:57:52 UT on 2019-02-19, \ni.e., 18.43 min after the burst.\n\nNo optical source is detected at the XRT position (Beardmore et al., GCN \n23902 & 23907) in our stacked image, down to a 3 sigma limiting \nmagnitude of R~17.5.",
  "circularId": 23910,
  "createdOn": 1550648513000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 190219A: NEXT-0.6m optical upper limit",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 190219A"
}