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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.

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