Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 6999

GRB071025: Xinglong TNT I-band upper limit
2007-10-25T17:51:37Z (17 years ago)
L.P. Xin at NAOC <>
L.P. Xin, M. Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng,
J. Wang , Y. Urata and W.K. Zheng on behalf of EAFON report:
We have observed the field of GRB071025(C. Pagani , GCN 6986)
with TNT 0.8m telescope at Xinglong observatory, started from
10:27:28.296 UT, about 6.3 hours after the burst. The wheter was
not good. A series of I-band images were obtained, and no new 
source was found in our 18*240s combined image within the
error region of the XRT(C. Pagani, GCN6986 GCN6990) and the 
locations reported by E.S. Rykoff(GCN 6987); S. Covino (GCN 6988);
J. S. Bloom (GCN 6989;).
the 3 sigma limit of our combined image derived from USNO-B1.0 
Imag was I =18.2 mag at the mean time of 7.1 hours after the burst.
This message may be cited.
Looking for U.S. government information and services? Visit