GCN Circular 6250
Subject
GRB 070406: Xinglong TNT optical Upper Limit
Event
Date
2007-04-07T00:38:13Z (19 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
W.K. Zheng, M.Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng,
Y. Urata, J.Z. Li and L.P. Xin on behalf of EAFON report:
We have imaged the field of GRB 070406 with the
TNT 0.8m telescope at Xinglong Observatory started
from 20:42:33 UT on Apil. 6, about 19.86 hours after the burst.
seven white band images were obtained,
and no new source was found in our Totally combined image
within the error region of BAT of the Swift.
the 3-sigma limit is ~19.8 derieved form USNO A-2.0.
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