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