{
  "bibcode": "2014GCN.16359....1X",
  "body": "D. Xu (DARK/NBI), H.-B. Niu, T.-Z. Yang, A. Esamdin, L. Ma (XAO) report:\n\nWe observed the BAT field of GRB 140606A (Stroh et al., GCN 16353)\nusing the 1m telescope located at Nanshan, Xinjiang, China.\nObservations started at 15:49:48 UT on 2014/06/06 (4.86 hr after the\nburst) and a series of 300s/500s R-band frames were obtained.\n\nThe optical afterglow of the burst is not detected within the BAT\nerror circle down to a limiting magnitude of R=20.8 mag, calibrated\nwith the nearby SDSS field.",
  "circularId": 16359,
  "createdOn": 1402097124000,
  "email": "dong.dark@gmail.com",
  "subject": "GRB 140606A: Nanshan optical upper limit",
  "submitter": "Dong Xu at DARK/NBI  <dong.dark@gmail.com>",
  "eventId": "GRB 140606A"
}