GRB 020918

K. Hurley, on behalf of the Ulysses GRB team,

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

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

A preliminary analysis of the Konus data for this event (GCN 1546
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 )
indicates that it originated from an ecliptic latitude between +20 and
+40 degrees.  Combining this information with the triangulated position
(an annulus centered at RA, Decl (2000)=171.715, 38.791 degrees, whose
3 sigma radius is 88.681 +/-0.030 degrees) limits the possible arrival
directions to the two sections of the annulus contained between RA,
Decl (2000)= 14.4, 50.3 and 45.4, 38.0 degrees, and between RA, Decl
(2000)= 257.7, -2.9 and 273.8, 16.6 degrees.

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, report:

Ulysses and Konus-Wind  observed this GRB at 47292 seconds.  As
observed by Ulysses, it had a duration of approximately 3 seconds, a
25-100 keV fluence of approximately  6.1E-06 erg/cm2, and a peak flux of
approximately  1.4E-06 erg/cm2 s over 0.25 seconds.

We have triangulated it to a preliminary annulus centered at
RA, Decl (2000)=171.715, 38.791 degrees, whose radius is
88.681 +/-0.030 degrees (3 sigma).

This event was not observed by Mars Odyssey, so we will not
be able to obtain a small error box for it.  We are waiting
for more Konus data, however, which may allow us to determine
the ecliptic latitude and exclude part of the annulus.