TITLE:   GCN CIRCULAR
NUMBER:  6722
SUBJECT: GRB 070808: Xinglong TNT optical Upper Limit
DATE:    07/08/08 20:20:33 GMT
FROM:    W.K. Zheng at NAOC  <zwk@bao.ac.cn>

Y.Q. Lou, X.F. Wang, L.P. Xin, M.Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu,
J.S. Deng, Y. Urata, and W.K. Zheng on behalf of EAFON report:

We have imaged the field of GRB 070808 (Cummings  et al., GCN 6718)
with the Xinglong TNT 80cm telescope. Observation started from
18:29:55, 115s after the burst with White and R band. No new
object was seen in our combined image within XRT error circle.
The 3 sigam limit is ~19.7 in our co-added White image derived
from USNO-A2.0, with mean time ~330s after the burst. Observation
is on going. 

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