{
  "bibcode": "2021GCN.31232....1M",
  "body": "J. Mao, Y.-X. Xin, and J.-M. Bai (YNAO) report:\n\n\nWe observed the field of GRB 211211A (D'Ai et al. GCN 31202) by the GMG telescope in Yunnan observatories.\n\nThe observation began from UT 22:41:02 Dec 12, 2021, about 33.5 hours from the trigger. We could not observe\n\nthe optical afterglow down to a magnitude limit of r~22.0.",
  "circularId": 31232,
  "createdOn": 1639533651000,
  "email": "jirongmao_obs@ynao.ac.cn",
  "subject": "GRB 211211A: GMG upper limit",
  "submitter": "Jirong Mao at Yunnan Obs  <jirongmao_obs@ynao.ac.cn>",
  "eventId": "GRB 211211A"
}