[vsnet-grb-info 15712] GRB 141031B: Nanshan optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17000
SUBJECT: GRB 141031B: Nanshan optical upper limit
DATE:    14/10/31 16:33:01 GMT
FROM:    Dong Xu at DARK/NBI  <dong.dark at gmail.com>

D. Xu (DARK/NBI), C.-H. Bai, T.-Z. Yang, A. Esamdin, L. Ma (XAO) report:

We observed the field of GRB 141031B (Gompertz et al., GCN 16998),
using the 1m telescope located at Nanshan, Xinjiang, China. We
obtained 2x300s and 1x600s R-band images, starting at 16:02:08 UT on
2014-10-31 (i.e., 1.090 hr after the burst).

No optical source is detected at the XRT position (R.A.=23:47:37.24,
Dec.=+41:21:07.7, Err. Rad.=2.4"), down to a limiting magnitude of
R=20.6 mag.