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GCN Circular 484

Subject
Refined IPN localization of GRB991216
Date
1999-12-18T05:34:16Z (24 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley, on behalf of the Ulysses GRB team, and M. Feroci,
on behalf of the BeppoSAX GRB team, report:

We have obtained a refined IPN annulus for GRB991216, approximately
two times narrower than the one reported in the automated GCN/IPN/
Huntsville localization circulated earlier today.  The annulus center
is at RA(2000), Decl.(2000) = 346.505, +31.230, and the radius is
84.915 +/- 0.016 degrees (3 sigma).  The annulus reduces the area of
the RXTE error box reported in the GCN/RXTE_PCA burst position notice
circulated earlier today, and its center line passes approximately
3 arcseconds from the optical transient position reported by
Halpern et al. (GCN 472).   This annulus can be refined further.

Due to hacker activity, a map cannot be posted immediately on
the IPN website.  Contact khurley@sunspot.ssl.berkeley.edu for
one.
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