GCN Circular 6424
Subject
GRB 070520: Xinglong EST optical Upper Limit
Date
2007-05-20T15:06:24Z (17 years ago)
From
L.P. Xin at NAOC <xlp@bao.ac.cn>
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 070520 (P. Romano et al., GCN 6423)
with the EST 1m telescope at Xinglong Observatory?
Observation started from 13:14:54 UT, 579s after the burst
with R band filter,
we derieved 3 sigam limit is ~20.6 in our 20*60s co-added images
withmean time ~20minutes.
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