GCN Circular 6962
Subject
GRB 071021: Xinglong TNT optical Upper Limit
Event
Date
2007-10-21T17:17:44Z (19 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,
J. Wang and W.K. Zheng on behalf of EAFON report:
We have imaged the field of GRB 071021 (T. Sakamoto, et al.;
GCN 6958) with the TNT 0.8m telescope at Xinglong
Observatory started from 09:55:06.5 UT, 813.8880 after
the burst. A series of White and R band images were
obtained, no new source was found in our combined
image within the error region of the XRT
(T. Sakamoto, et al.; GCN 6958) and the location reported
by C. Guidorzi et al (GCN 6959)
The 3-sigma limit derived from
USNO-B1.0 R2 mag were:
------------------------------------
Band Mid time Exp time Limit Mag
White 0.72 hours 40*20s 20.32
R 1.38 hours 12*300s 20.85
R 3.25 hours 16*600s 21.69
This message may be cited.
[GCN OPS NOTE(21oct07): Per author's request, the names for the 3 references
were changed T. Sakamoto, T. Sakamoto, and C. Guidorzi.]