[vsnet-grb-info 12595] GRB 121108A: Weihai observatory optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13955
SUBJECT: GRB 121108A: Weihai observatory optical observations
DATE:    12/11/08 20:02:23 GMT
FROM:    Dong Xu at DARK/NBI  <dong.dark at gmail.com>

D. Xu (DARK/NBI), J.-M. Ai, C. Cao, S.-M. Hu (SDU) report:

We observed the field of GRB 121108A (Ukwatta et al., GCN 13952) using
the 1m telescope located at Weihai, Shandong Province, China.
Observations started at 18:10 UT on 2012-11-08 (i.e., 22 mins after
the BAT trigger) and 4x600s exposures in the R filter were obtained.
No optical source was found within the enhanced XRT error circle down
to a limit of R~20.5 mag (3sigma), calibrated with the USNO B1
catalog.