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GCN Circular 1675

Subject
GRB021104(=H2434): A Long, X-Ray-Rich GRB Localized by HETE
Date
2002-11-05T03:59:54Z (22 years ago)
From
Don Lamb at U.Chicago <lamb@oddjob.uchicago.edu>
T. Tamagawa, Y. Shirasaki, C. Graziani, M. Matsuoka, K. Torii,
T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner,
T. Donaghy, Y. Nakagawa, D. Takahashi, M. Suzuki, R. Satoh,
and Y. Urata, 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;

N. Butler, G. Crew, J. Doty, G. Prigozhin, R. Vanderspek, J. Villasenor,
T. Cline, J. G. Jernigan, A. Levine, F. Martel, E. Morgan, 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, C. Barraud and K. Hurley on behalf of
the HETE FREGATE Team;

write:


At 07:01:02.93 UTC (25262.93 s UT) on 4 Nov 2002, the HETE FREGATE
and WXM instruments detected event H2434, a long, X-ray-rich GRB.

Ground analysis of the WXM data for the burst produced a location,
which was reported in a GCN Position Notice at 9:47 UT, 166 minutes
after the burst.  The WXM localization SNR was 5.  The WXM location
can be expressed as a 90% confidence rectangle that is approximately
24 arcminutes in width and 42 arcminutes in length.  The corners of
the rectangle lie at the following J2000 coordinates:

RA = 3h 52m 40.3s, Dec = 38o 19' 26"
RA = 3h 54m 44.6s, Dec = 38o 17' 10"
RA = 3h 54m 56.2s, Dec = 37o 34' 59"
RA = 3h 52m 52.6s, Dec = 37o 37' 12".

The burst duration in the 8-40 keV band was ~26s.  A total of 2120
counts were detected during that interval, corresponding to a fluence
of ~4 x 10-7 ergs cm-2 . The peak flux was >3 x 10-8 ergs cm-2 s-1
(i.e., >1 x Crab flux).

A light curve for GRB021104 is provided at the following URL:

http://space.mit.edu/HETE/Bursts/GRB021104/

This message is citable.
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