{
  "bibcode": "2013GCN.15409....1X",
  "body": "D. Xu (DARK/NBI), G.-J. Feng, H.-B. Niu, A. Esamdin, L. Ma (XAO) report:\n\nWe observed the field of the LAT error circle of GRB 131029A (Racusin\net al., GCN 15399) using the 1m telescope located at Mt. Nanshan,\nXinjiang, China, equipped with a 1.2x1.2 deg^2 CCD camera. Three\nR-band frames with exposures of 180s, 240s, and 300s were obtained at\na mean time of 13.656 hr after the Fermi/LAT trigger.\n\nAt the reported three sub-threshold XRT positions (Evans, GCN 15400),\nno optical transient is detected down to a limiting magnitude of\nR=19.5 mag, calibrated with nearby SDSS field.",
  "circularId": 15409,
  "createdOn": 1383176496000,
  "email": "dong.dark@gmail.com",
  "subject": "GRB 131029A: Nanshan optical observations",
  "submitter": "Dong Xu at DARK/NBI  <dong.dark@gmail.com>",
  "eventId": "GRB 131029A"
}