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 3313

GRB 050421: NIR observations
2005-04-22T02:30:07Z (19 years ago)
Paul Price at IfA,UH <>
P.A. Price (IfA), T. Minezaki (U. Tokyo), L. Cowie (IfA) and Y. Yoshii
(U. Tokyo) report on behalf of the UH-MAGNUM GRB collaboration:

We observed the XRT position of GRB 050421 (Godet et al., GCN #3301)
with the automated MAGNUM telescope + MIP dual-beam optical-NIR imager,
commencing at April 21.57 UTC (9.4 hours after the GRB).  We obtained
9x60 sec images in JHK, reaching limiting magnitudes of J ~ 20.3 mag, H
~ 19 mag, K ~ 18.6 mag (from comparison with a single 2MASS star).  We
do not detect any afterglow candidate in the XRT error circle.

This message may be cited.
Looking for U.S. government information and services? Visit