GCN Circular 9658
Subject
GRB 090709A: Xinglong TNT optical upper limit
Date
2009-07-12T03:16:43Z (16 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
L.P. Xin, W.K. Zheng, Y.L. Qiu, J.Y. Wei, J. Wang,
J.S. Deng and J.Y. Hu on behalf of EAFON report:
We have observed GRB 090709A (Morris et al.GCN 9625)
with Xinglong TNT telescope from July 9, 13:41:18 (UT),
6.04 hour after the burst. After combined 10*600s R
band images, no new source or afterglow counterpart (Morgan et al.GCN
9635;Guidorzi et al. GCN 9648) was
found in our combined image within the XRT errorbox (Morris et al. GCN
9625).
The uplimit is estimated to be about 20.6 mag at the mean time
of 6.816 hours since the trigger.
This message may be cited.
For more information about Xinglong GRBs Follow-up
observations, please visit the website:
http://www.xinglong-naoc.org/grb/