{
  "bibcode": "2022GCN.32727....1M",
  "body": "J. Mao, K.-X. Lu, X.-H. Zhao, and J.-M. Bai (YNAO) report:\n\n\n\n\nWe observed the field of GRB 221009A (Dichiara et al. GCN 32632) with the 2.4-meter optical\n\ntelescope at Gao-Mei-Gu (GMG) station of Yunnan Observatories. The observation began at\n\nUT 14:34:40, 12, Oct. 2022, about 3 days after the trigger. We marginally detected the\n\nafterglow. The preliminary magnitude was measured to be z~18.9. We caution that the magnitude\n\nhas a relatively large uncertainty due to the very poor seeing.",
  "circularId": 32727,
  "createdOn": 1665630114000,
  "email": "jirongmao_obs@ynao.ac.cn",
  "subject": "GRB 221009A: GMG observation",
  "submitter": "Jirong Mao at Yunnan Obs  <jirongmao_obs@ynao.ac.cn>",
  "eventId": "GRB 221009A"
}