TITLE:   GCN CIRCULAR
NUMBER:  8618
SUBJECT: GRB 081203A: Optical observations of Xinglong TNT telescope
DATE:    08/12/05 07:57:42 GMT
FROM:    L.P. Xin at NAOC  <xlp@bao.ac.cn>

H. Liu, J. Wang, L.P. Xin, Y.L. Qiu, J.Y. Wei, J.Y. Hu, 
J.S. Deng, W.K. Zheng and Y. Urata on behalf of EAFON report:

We have observed GRB081203A (Parsons et al., GCN 8595) 
with Xinglong TNT telescope from Dec.03th,13:57:11(UT),
6.43 hr after the burst to Dec.03,22:19:37.67 (UT).
A series of R band and V band have been obtained.
The optical afterglow was clearly detected in all the images.

Further observations of GRB081203A were also made with 
Xinglong TNT telescope from Dec.04th,21:29:30.409(UT). The 
OT was still marginal detected after combined 11*600s images.

we found the afterglow dacayed from R=19.0 at 7.25 hr to 
R=21.1 at 24.6 hr. The decay slope index is about 1.59, which is
consistent with the index derived from Volkov et al,(GCN 8604).

Further observations are encouraged.

This message may be cited.

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