{
  "bibcode": "2016GCN.18969....1X",
  "body": "D. Xu, L.-P. Xin, J. Wang (NAOC/CAS) report on behalf of a larger \ncollaboration:\n\nWe observed the optical afterglow of GRB 160131A (e.g., Page et al., GCN \n18951; Yurkov et al., GCN 18952; Guidorzi et al., GCN 18953; Xin et al., \nGCN 18954) using the 2.16m telescope located at Xinglong, Heibei, China, \nequipped with the BFOSC camera. A 2400s spectrum was acquired with the \nG4+385LP grism covering the range of 3500 - 8500 AA, starting at \n13:49:08 UT on 2016-01-31.\n\nThe spectrum shows a continuum across the whole range, superimposed with \nabsorption features of Mg II, Ca II H+K at a common redshift of 0.97, \nbeing consistent with measurements by Malesani et al. (GCN 18965) and de \nUgarte Postigo et al. (GCN 18966).\n\nWe thank the excellent support of the Xinlong 2.16m staff, in particular \nMeng Zhai and Junjun Jia.",
  "circularId": 18969,
  "createdOn": 1454297882000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 160131A: Xinglong/BFOSC spectroscopy",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 160131A"
}