{
  "bibcode": "2015GCN.17651....1M",
  "body": "J. Mao, J. Zhang, and J.-M. Bai (YNAO) report:\n\n\nWe observed the field of GRB 150120B (D'Elia et al., GCN 17314) with the 2.4-meter optical telescope at Gao-Mei-Gu (GMG) station \nof Yunnan Observatory. Observations began from UT 13:42:43.5 20th, Jan., 2015 (about 6.3 hours after the trigger). \nWe clearly detected the optical counterpart with brightness of R=22.1+/-0.1 mag.\n\n\nJ. Mao apologizes for this very late GCN circular submission.",
  "circularId": 17651,
  "createdOn": 1427617295000,
  "email": "jirongmao_obs@ynao.ac.cn",
  "subject": "GRB 150120B: GMG observation",
  "submitter": "Jirong Mao at Yunnan Obs  <jirongmao_obs@ynao.ac.cn>",
  "eventId": "GRB 150120B"
}