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GCN Circular 1545

IPN triangulation of GRB020911 (2 large error boxes)
2002-09-19T17:24:33Z (22 years ago)
Kevin Hurley at UCBerkeley/SSL <>
K. Hurley, on behalf of the Ulysses GRB team,

T. Cline, on behalf of the Ulysses and Konus-Wind GRB teams, and

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

Ulysses and Konus observed this burst at 64815 s.  As observed by
Ulysses, it had a duration of ~5 s, a 25-100 keV fluence of
3x10^-6 erg/cm^2, and a peak flux over 0.5 s of 8.7x10^-7 erg/cm^2 s^-1.
We have triangulated it to an annulus centered at RA, Decl(2000)=350.222,
-39.646 degrees, whose radius is 38.504 +/- 0.087 degrees (3 sigma).
In addition, a preliminary analysis of the Konus ecliptic latitude
response indicates that this burst originated from a region
whose ecliptic latitude was between 0 and -20 degrees.  This
defines two possible sections of the annulus.  One is between
RA, Decl=313.7, -17.4 and 299.1, -41.1 degrees, and the other
is between RA, Decl=356.6, -1.5 and 21.3, -12.6 degrees.

As Mars Odyssey did not observe this event, a small error box
cannot be derived for it.  However, improvements to the annulus
and ecliptic latitude determination are possible.
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