{
  "bibcode": "2018GCN.23406....1L",
  "body": "J.H. Liu (XAO), Z.P. Zhu, D. Xu (NAOC), X. Zhang, F.F. Song, Z.X. Li, \nJ.Y. Bai, H.B. Niu, J.Z. Liu, A. Esamdin, L. Ma, Y. Zhang (XAO) report:\n\nWe observed the field of GRB 181103A (Tohuvavohu et al., GCN 23402) \nusing the Nanshan-1m telescope located at Nanshan, Xinjiang, China. We \noptained 5��300s, 1��400s, 1��600s R-band frames, starting at 23:07:05 UT \non 2018-11-03, i.e, 18.73 hr after the Swift trigger.\n\nNo optical source was detected in the stacked image at the XRT position \n(Evans et al, GCN 23403), down to a limiting magnitude of R ~ 21.3 mag \nat the median time of 19.31hr post-burst, calibrated with the nearby \nSDSS field.",
  "circularId": 23406,
  "createdOn": 1541332289000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 181103A: Nanshan-1m optical upper limit",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 181103A"
}