TITLE:   GCN CIRCULAR
NUMBER:  31364
SUBJECT: GRB 220101A: GMG observation
DATE:    22/01/02 03:43:02 GMT
FROM:    Jirong Mao at Yunnan Obs  <jirongmao_obs@ynao.ac.cn>

J. Mao, B.-L. Lun, and J.-M. Bai (YNAO) report:




We observed the field of GRB 220101A (Tohuvavohu et al. GCN 31347) with the 2.4-meter optical

telescope at Gao-Mei-Gu (GMG) station of Yunnan Observatories. The observation began at

UT 12:31:35, 1, Jan. 2022, about 7.3 hours after the trigger. We clearly detected the afterglow.

The preliminary magnitude was measured to be R~19.0. The weather turned to be cloudy, and it

prevented us from further observations.




We appreciate all the astronomers working during the holidays. Happy new year!