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 12314

GRB 110825A: GMG optical observation
2011-08-28T12:03:44Z (13 years ago)
Xiao-hong Zhao at Nanjing University <>
X. H. Zhao (YNAO), D. Xu (WIS), J. M. Bai (YNAO), report on behalf of a larger collaboration:

We observed the XRT field (Zhang & Grupe, GCN 12308) of GRB 110825A
(Hurley et al., GCN 12307) with the 2.4m Gao-Mei-Gu (GMG) telescope
equipped with YFOSC in Yunan, China. Observations started at 19:02:36
UT on 27th August 2011 and 3x1200s R-band images were obtained.
The possible optical afterglow candidate, derived from a weak
detection from a single frame (Xu et al., GCN 12311) is not detected
in our stacked R-band image, which gives rise to a 3sigma upper limit
of R~23.9 mag for the XRT error circle, calibrated with the same USNO
reference star in GCN 12311.

No further observation with the GMG telescope is planned.
Looking for U.S. government information and services? Visit