GCN Circular 1833

K. Hurley and T. Cline, on behalf of the Ulysses and HETE teams,

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

G. Ricker, J-L Atteia, N. Kawai, D. Lamb, S. Woosley, J. Doty, R. Vanderspek, 
J. Villasenor, G. Crew, G. Monnelly, N. Butler, J.G. Jernigan, A. Levine, 
F. Martel, E. Morgan, G. Prigozhin, J. Braga, R. Manchanda, G. Pizzichini,
Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa, K. Torii,
T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, T. Donaghy,
M. Boer, J-F Olive, and J-P Dezalay, on behalf of the HETE GRB team, report:

Ulysses, INTEGRAL (SPI-ACS) and HETE-FREGATE  observed this GRB at
45157 seconds.  As observed by Ulysses, it had a duration of
approximately  50 seconds, a 25-100 keV fluence of approximately
2.9E-05 erg/cm2, and a peak flux of approximately  1.6E-06 erg/cm2 s
over 0.25 seconds.

We have triangulated it to a preliminary annulus centered  at RA,
Decl(2000)= 357.725 -40.065 degrees, whose radius is 66.291 +/-  0.017
degrees (3 sigma).

This annulus may be constrained and/or improved but it is not known at
this point whether this event was observed by Mars Odyssey, and thus
whether a small error box can be derived for it.