[vsnet-grb-info 14221] GRB 131128A: Nanshan afterglow candidate

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15535
SUBJECT: GRB 131128A: Nanshan afterglow candidate
DATE:    13/11/28 15:49:12 GMT
FROM:    Dong Xu at DARK/NBI  <dong.dark at gmail.com>

D. Xu (DARK/NBI), H.-B. Niu, J.-Z. Liu, G.-J. Feng, C.-H. Bai, A.
Esamdin, L. Ma (XAO) report:

We observed the fields of GRB 131128A (Sonbas et al., GCN 15533),
using the 1m telescope located on Mt. Nanshan, Xinjiang, China.
Observations started 880s after the Swift trigger and a series of
R-band frames were obtained.

An optical source is clearly detected at coordinates:

R.A. (J2000) = 23:41:13.75
Dec.(J2000) = +31:18:23.14

Error Radius: ~1 arcsec

which is consistent with the SPER XRT position of this burst
(http://www.swift.ac.uk/sper/), thus it's likely the afterglow of the
GRB.

Note that there is a very bright star (r=14.76 mag from SDSS) just a
few arcsec away from this optical transient. Observations are ongoing.