[vsnet-grb-info 5263] GRB071020A: Xinglong TNT Optical afterglow
observations
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Sun Oct 21 07:34:01 JST 2007
TITLE: GCN CIRCULAR
NUMBER: 6956
SUBJECT: GRB071020A: Xinglong TNT Optical afterglow observations
DATE: 07/10/20 22:33:55 GMT
FROM: L.P. Xin at NAOC <xlp at bao.ac.cn>
L.P. Xin, M. Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng,
J. Wang, Y. Urata and W.K. Zheng on behalf of EAFON report:
We have imaged the field of GRB071020A (Barthelymy et al
GCN6949) using the TNT 0.8 telescope at Xinglong observatory.
A series of R-band images were obtained from 17:08:19.4,
10.1 hours after the burst.
In our 15*600s combined image, we detected afterglow
(Schaefer et al GCN6947, Beardmore et al GCN 6955),
The estimated brightness derived from USNO-B1.0 was
R=21.14 +/- 0.08 at 11.5 hours after the burst
(mean time of the stacked image).
Further observations are encouraging.
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