GCN Circular 7015
Subject
GRB071028: Xinglong EST V-band upper limit
Date
2007-10-29T03:32:13Z (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,
J. Wang and W.K. Zheng on behalf of EAFON report:
We have imaged the field of GRB071028 (J. L. Racusin, GCN7012 ; J. Cummings,
GCN7013; J. Racusin, GCN7014) with EST 1m telescope at Xinglong Observatory.
The observations were started from 17:57:16 UT, 16.25min after the burst.
A series of V-band images were obtained . No new source was found in our
combined images within the error region of the XRT (J. L. Racusin, GCN7012)
but We found the location reported by J. Racusin(GCN7014) was consisting with
a very bright star in USNO-B1.0.
The 3 sigma limit of our V-band combined images derived from USNO-B1.0 R2mag
were :
------------------------------------
Band Mid time Exp time Limit Mag
V 30min 19*60 19.8
V 1.19hours 9*300s 19.98
V 2.98hours 14*600s 20.09
This message may be cited