Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 6961

GRB 071021 : Lulin R-band limit
2007-10-21T15:12:26Z (17 years ago)
Kuiyun Huang at ASIAA <>
W.S. Hsiao, H.C. Lin , Y.H. Lee, Y. Urata, K.Y. Huang on behalf of the
EAFON team

The B,V,R band observations for GRB 071021 field with Lulin 1-m
telescope started at 1.38 hours after the burst. No source was found
at XRT position (Sakamoto et al.; GCN 6958) and optical candidate
position (Guidorzi et al.; GCN 6959) in our combined images. The
R-band limiting magnitude, compared with several USNOB stars, is about
20.4 at 1.87 hours after the burst . This result suggests that the
fading optical source reported by Guidorzi et al. (GCN 6959) is the
optical afterglow of GRB 071021.

this message may be cited

[GCN OPS NOTE(22oct07): Per author's request, "Golenetskii et al.; GCN 6959"
was changed to "Guidorzi et al.; GCN 6959".]
Looking for U.S. government information and services? Visit