[vsnet-grb-info 14197] GRB 131122A: Nanshan optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15511
SUBJECT: GRB 131122A: Nanshan optical upper limit
DATE:    13/11/22 23:13:04 GMT
FROM:    Dong Xu at DARK/NBI  <dong.dark at gmail.com>

D. Xu (DARK/NBI), G.-J. Feng, X. Zhang, A. Esamdin, L. Ma (XAO) report:

We observed the IBIS/ISGRI field of GRB 131122A (Gotz et al., GCN
15510) using the 1m telescope located on Mt. Nanshan, Xinjiang, China.
We obtained 6x360s R-band frames at a mean time of 22:28:18 UT on
2013-11-22, i.e., 1.055 hr after the INTEGRAL trigger.

Visual inspect of the Intergral 1.6 arcmin error circle against DSS II
and SDSS shows that no new optical source is detected down to a
limiting magnitude of R=20.6 mag.