TITLE:   GCN CIRCULAR
NUMBER:  34999
SUBJECT: GRB 231111A: GMG observation upper limit
DATE:    23/11/12 12:30:52 GMT
FROM:    Jirong Mao at Yunnan Obs <jirongmao@mail.ynao.ac.cn>

B.-T. Wang, R.-Z. Li, J. Mao, X. Ding, J.-M. Bai report:

We observed the field of GRB 231111A ( Melandri et al. GCN 34981) by the GMG telescope in Yunnan observatories. The observation began from UT 11:29:03 Nov 12, 2023, about 21.2 hours from the trigger. We could not observe the optical afterglow down to a magnitude limit of R~20.7.