GCN Circular 1649

T. Sakamoto, Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa,
K. Torii, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, and
T. Donaghy, on behalf of the HETE WXM Team;

G. Ricker, J-L Atteia, N. Kawai, D. Lamb, and S. Woosley on behalf of
the HETE Science Team;

J. Villasenor, R. Vanderspek, J. Doty, G. Crew, G. Monnelly, N. Butler,
T. Cline, J.G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin,
G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf of
the HETE Operations and HETE Optical-SXC Teams;

M. Boer, J-F Olive, J-P Dezalay, and K. Hurley on behalf of the HETE
FREGATE Team;

write:


At 18:43:00.00 UTC (67380.00 s UT) on 21 Oct 2002, the HETE FREGATE
and WXM instruments detected a faint, untriggered XRF.

Ground analysis of the WXM data for the burst produced a location,
which was reported in a GCN Notice at 10:58:44 UT on 22 Oct 2002,
about 16 hours after the burst.  The WXM localization SNR was 6.
The WXM location can be expressed as a 90% confidence circle that
is 20 arcminutes in radius and is centered at

RA = 00h 17m 23s, Dec = -01d 37' 00" (J2000).

In the WXM 2-25 keV band, the burst had a duration of ~13 seconds.
The spectrum of the burst is soft, making estimates of its peak
flux and fluence uncertain.

A light curve for GRB021021 is provided at the following URL:

http://space.mit.edu/HETE/Bursts/GRB021021.

This message is citable.