GCN Circular 1870

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

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, and

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

Ulysses, HETE-FREGATE, and INTEGRAL (SPI-ACS)  observed this GRB at
09942 seconds.  As observed by Ulysses, it had a duration of
approximately  50 seconds, a 25-100 keV fluence of approximately
1.2E-05 erg/cm2, and a peak flux of approximately  1.2E-06 erg/cm2 s
over 0.50 seconds.

We have triangulated it to a preliminary annulus centered  at RA,
Decl(2000)= 171.644, +41.752 degrees, whose radius is 55.349 +/-  0.035
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.