GCN Circular 32727
Subject
GRB 221009A: GMG observation
Date
2022-10-13T03:01:54Z (2 years ago)
From
Jirong Mao at Yunnan Obs <jirongmao_obs@ynao.ac.cn>
J. Mao, K.-X. Lu, X.-H. Zhao, and J.-M. Bai (YNAO) report:
We observed the field of GRB 221009A (Dichiara et al. GCN 32632) with the 2.4-meter optical
telescope at Gao-Mei-Gu (GMG) station of Yunnan Observatories. The observation began at
UT 14:34:40, 12, Oct. 2022, about 3 days after the trigger. We marginally detected the
afterglow. The preliminary magnitude was measured to be z~18.9. We caution that the magnitude
has a relatively large uncertainty due to the very poor seeing.