[vsnet-grb-info 2300] IPN triangulation of GRB051022 (=H3950)

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4139
SUBJECT: IPN triangulation of GRB051022 (=H3950)
DATE:    05/10/22 18:59:28 GMT
FROM:    Kevin Hurley at UCBerkeley/SSL  <khurley at ssl.berkeley.edu>

K. Hurley and T. Cline, on behalf of the Ulysses and Mars
Odyssey GRB teams,

I. Mitrofanov, S. Charyshnikov, V. Grinkov, A. Kozyrev, M. Litvak,
and A. Sanin, on behalf of the HEND-Odyssey GRB team,

W. Boynton, C. Fellows, K. Harshman, C. Shinohara, and R. Starr,
on behalf of the GRS-Odyssey GRB team, and

E. Mazets and S. Golenetskii, on behalf of the Konus-Wind GRB team,
report:

Mars Odyssey and Konus-Wind observed GRB051022 (=H3950, GCN 4131
and 4137).  We have triangulated it to an annulus centered at
RA, Decl(J2000)=47.9138, +16.5422 degrees, whose radius is
46.4533 +/- 0.0684 degrees (3 sigma).  The center line of this
annulus passes 0.004 degrees from the HETE SXC position, and
the annulus just encompasses the SXC error circle, without
substantially reducing its area.  We also confirm that this
burst was exceptionally bright, and that its duration, as observed
by HEND (>~50 keV), was about 200 s.  More details will follow.