{
  "bibcode": "2020GCN.28180....1Z",
  "body": "Z.P. Zhu, D. Xu, X. Liu, S.Y. Fu (NAOC), X. Gao (Urumqi No.1 Senior High \nSchool), X. Zhang, J.Z. Liu (XAO) report:\n\nWe observed the field of GRB 200729A (Evans et al., GCN 28165) using the \nNEXT-0.6m telescope located at Nanshan, Xinjiang, China. We obtained \n10x100s frames in the Sloan r-band, starting at 15:51:05 UT on \n2020-07-30, i.e., 20.22 hr after the burst.\n\nNo optical source is detected in our stacked image at the enhanced XRT \nposition (Osborne et al., GCN 28168), down to a limiting magnitude of \nr~20.2, calibrated with the nearby PanSTARRS field.",
  "circularId": 28180,
  "createdOn": 1596150638000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 200729A: Nanshan/NEXT optical upper limit",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 200729A"
}