[vsnet-grb-info 12797] GRB 130122A: Xinglong optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14144
SUBJECT: GRB 130122A: Xinglong optical upper limit
DATE:    13/01/23 19:50:21 GMT
FROM:    Dong Xu at DARK/NBI  <dong.dark at gmail.com>

L.P. Xin (NAOC), D. Xu (DARK/NBI), Z.Y. Wu, J.Y. Wei, Y.L. Qiu, T.M.
Zhang, J. Wang, J.S. Deng, C. Wu, X.H. Han (NAOC) report on behalf of
a larger collaboration:

We began to observe the field of GRB 130122A (Lien et.al. GCN 14140)
using the Xinglong 2.16m telescope located in Heibei Province, China
at 18:14:12 UT on 2013-01-23. We obtained 5x300s R-band images in a
poor seeing, with a median time of 19.7 hr after the BAT trigger.

The afterglow is not detected in the stacked image, down to a 3sigma
limit of R~20.2 mag, calibrated with nearby USNO B1 stars.

This message may be cited.

For more information about Xinglong GRBs Follow-up observations,
please visit the website:
http://www.xinglong-naoc.org/grb/