{
  "bibcode": "2014GCN.16994....1X",
  "body": "D. Xu (DARK/NBI), G.-J. Feng, X. Zhang, A. Esamdin, L. Ma (XAO) report:\n\nWe observed the field of the three X-ray afterglow candidates (see\nhttp://www.swift.ac.uk/xrt_products/TILED_GRB00031/) of GRB 141029A\ndetected by MAXI/GSC (Nakahira et al., GCN16981), using the 1m\ntelescope located at Nanshan, Xinjiang, China. We obtained 2x300s and\n1x600s R-band images, starting at 19:37 UT on 2014-10-29 (i.e., 15.09\nhr after the trigger).\n\nAs reported, the X-ray source 1 (S1) and source 2 (S2) have catalogued\noptical counterparts already, and the X-ray source 3 (S3) located at\nR.A. = 04:37:20.17, Dec. = -16:08:09.3  (with Error Radius=8.8������)\ndoesn't have a catalogued optical counterpart. However, no optical\nsource is detected at the S3 position in the Nanshan images, down to a\nlimiting magnitude of R=20.5 mag.",
  "circularId": 16994,
  "createdOn": 1414696111000,
  "email": "dong.dark@gmail.com",
  "subject": "GRB 141029A: Nanshan optical upper limit",
  "submitter": "Dong Xu at DARK/NBI  <dong.dark@gmail.com>",
  "eventId": "GRB 141029A"
}