{
  "bibcode": "2015GCN.18679....1H",
  "body": "Yanhui Han (NAOC/CAS, HUST), Thomas Kruehler (ESO), Dong Xu (NAOC/CAS), \nYoudong Hu (IAA-CSIC), and Yin Qing (Geneva Observatory) report:\n\nWe observed the field of GRB 151210A (Evans et al., GCN 18678) with the \n1-m LCOGT telescope at Cerro Tololo, Chile. Observations started \n03:34:06 UT on 2015-12-10 (i.e., 21.2 mins after the GRB), and we \nobtained 10x240s R-band images.\n\nWithin the XRT error circle (Evans et al., GCN 18678), an uncatalogued \noptical source is detected in our stacked image at coordinates:\n\nR. A. = 04:20:28.048\nDec. = -71:15:02.53\n\nwith an error radius of ~0.5 arcsec. The object roughly has R~21.5 mag, \ncalibrated with the nearby USNO B1 field. We thus consider that the \nsource is very likely the optical afterglow of GRB 151220A.",
  "circularId": 18679,
  "createdOn": 1449725593000,
  "email": "dxu@nao.cas.cn",
  "subject": "GRB 151210A: Optical afterglow candidate from LCOGT-Cerro Tololo",
  "submitter": "Dong Xu at NAOC/CAS  <dxu@nao.cas.cn>",
  "eventId": "GRB 151210A"
}