TITLE:   GCN CIRCULAR
NUMBER:  20193
SUBJECT: GRB 161117A: GMG observation limit
DATE:    16/11/18 05:31:04 GMT
FROM:    Jirong Mao at Yunnan Obs  <jirongmao_obs@ynao.ac.cn>

J. Mao, X. Yu, and J.-M. Bai (YNAO) report:


We observed the field of GRB 161117A (Cummings et al., GCN 20179) with the 2.4-meter optical telescope at Gao-Mei-Gu (GMG)
station of Yunnan Observatories. Observations began from 11:07:21 UT, Nov. 17th, 2016, about 9.5 hours after the trigger. 
We did not detect any source at the afterglow position down to a limit of R~20.6 mag.