GRB 031107

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

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

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

D. M. Smith, R. P. Lin, J. McTiernan, R. Schwartz, C. Wigger, W.
Hajdas, and A. Zehnder, on behalf of the RHESSI GRB team, report:

Konus-Wind, Mars Odyssey - HEND, and RHESSI observed this ~25 s long
burst at 66246 s.  We have triangulated it to a preliminary annulus
centered at RA, Decl (2000) = 342.257, -9.639 degrees, whose radius is
50.513 +/- 0.446 degrees (3 sigma).  In addition, the Konus ecliptic
latitude response limits the arrival direction to ecliptic latitudes
between -50 and -20 degrees, that is, to those portions of the annulus
between RA, Decl = 23, -46 and 34, -8 degrees, and 297, -41 and 355,
-59 degrees.

As this burst was not observed by Ulysses due to a high solar
proton-induced background, only minor improvements to this localization
are possible.