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GCN Circular 2425

Subject
IPN triangulation of GRB031020 (large error box)
Date
2003-10-23T16:56:06Z (20 years ago)
From
Kevin Hurley at UCBerkeley/SSL <khurley@sunspot.ssl.berkeley.edu>
K. Hurley and T. Cline, on behalf of the Ulysses, Konus, 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:

Ulysses, Mars Odyssey-HEND, and Konus-Wind  observed this GRB at 07811
seconds.  As observed by Ulysses, it had a duration of approximately
45 seconds, a 25-100 keV fluence of approximately  4.4E-06 erg/cm2, and
a peak flux of approximately  4.6E-07 erg/cm2 s over 0.50 seconds.

We have triangulated it to a preliminary, 3 sigma error box whose
approximate area is 5000 sq. arcmin. and whose coordinates are:

    RA(2000)                              DEC(2000)
 ERROR BOX CENTER:  11 h 58 m 30.84 s    -69 o 26 '   9.93 " 
 ERROR BOX CORNER 1: 11 h 45 m 46.63 s    -69 o 40 '  56.36 " 
 ERROR BOX CORNER 2: 10 h 32 m 13.96 s    -69 o 27 '  47.92 " 
 ERROR BOX CORNER 3: 13 h 13 m  6.26 s    -66 o 58 '  57.37 " 
 ERROR BOX CORNER 4: 12 h 10 m 52.13 s    -69 o  7 '  59.60 " 

This error box may be improved, but as Ulysses, Earth, and Mars
are still almost aligned, a small error box cannot be derived
for this event.
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