GRB 031024

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, and

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

Ulysses and Mars Odyssey (GRS) observed this burst at 33817 s
+/- 55 s (the uncertainty is due to the fact that no near-Earth
spacecraft has reported this event yet).  From the limited data
available at this time, the duration appears to be >~350 s,
the 25-100 keV fluence ~5 x 10^-6 erg/cm^2, and the peak flux
over 0.5 s ~2 x 10^-6 erg cm^2 s^-1.

We have triangulated it to a preliminary annulus centered
at RA, Decl.(2000)=168.621, +16.880, whose radius is 65.036 +/- 0.019
degrees (3 sigma).

This localization can be improved, particularly if the event
was observed by any near-Earth spacecraft.

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

A. von Kienlin, G. Lichti, and A. Rau, on behalf of the INTEGRAL
SPI-ACS GRB team, report:

Konus-Wind  and INTEGRAL (SPI-ACS) also observed this burst (GCN
2426
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 ).  The Earth-crossing time was 33855 s.  We have triangulated it
to a preliminary, 3 sigma error box with approximate area 350 square
arcminutes whose coordinates are:


    RA(2000)                              DEC(2000)
 ERROR BOX CENTER:  15 h  1 m 46.96 s    -16 o  9 '  34.86 " 
 ERROR BOX CORNER 1: 15 h  2 m 48.10 s    -15 o 44 '   7.45 " 
 ERROR BOX CORNER 2: 14 h 58 m  8.52 s    -17 o 43 '  29.45 " 
 ERROR BOX CORNER 3: 15 h  5 m 22.96 s    -14 o 31 '  30.06 " 
 ERROR BOX CORNER 4: 15 h  0 m 45.64 s    -16 o 34 '  43.88 " 

This error box may be improved.