GCN Circular 1868

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

These two bursts were detected by the IPN at 40412 s 40588 s.
Their localizations are consistent with a common origin, although
given the uncertainties, this may be due to chance.

The first event was observed by INTEGRAL (SPI-ACS) and HETE-FREGATE.  Its
duration was approximately 30 seconds.  We have triangulated it to a
circle centered at RA, Decl (2000)= 260.895, +26.835 degrees, whose
radius is approximately 90 degrees.

Ulysses, INTEGRAL (SPI-ACS), and HETE-FREGATE  observed the second
event.  As observed by Ulysses, it had a duration of approximately 40
seconds, a 25-100 keV fluence of approximately  2E-05 erg/cm2, and a
peak flux of approximately  8.6E-07 erg/cm2 s over 0.50 seconds.

We have triangulated it to a preliminary annulus centered  at RA,
Decl(2000)= 172.201, +41.659 degrees, whose radius is 63.183 +/-  0.044
degrees (3 sigma ).

These localizations can be improved and/or constrained, but it is not
known at this point whether small error boxes can be derived for these
events.