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GCN Circular 1682

Subject
GRB021112 (=H2448): A Long GRB Localized by HETE
Date
2002-11-12T15:54:15Z (21 years ago)
From
George Ricker at MIT <grr@space.mit.edu>
GRB021112 (=H2448): A Long GRB Localized by HETE

E. Fenimore, Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa, K. 
Torii, T. Sakamoto, A. Yoshida, 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 03:28:15.89 UTC (12495.89 s UT) on 12 Nov 2002, the HETE FREGATE 
and WXM instruments detected event H2448, a long GRB.

Ground analysis of the WXM data for the burst produced a location 
which was reported in a GCN Position Notice at 04:49 UT, 81 minutes 
after the burst.  Further ground analysis of the WXM data produced a 
refined location, which was reported in a second GCN Position Notice 
at 05:29 UT. At the time that the second GCN Position Notice was 
issued, we noted that a transcription error had resulted in an error 
of 1 degree in the value of the declination cited in the 04:49 UT 
Notice.

The WXM localization SNR was 4.  The refined WXM ground location can 
be expressed as a 90% confidence circle that is 20 arcminutes in 
radius and is centered at

RA = +02h 36m 52s, Dec = +48d 50' 56" (J2000).

The burst duration in the 8-40 keV band > 5s. In the 8-40 keV band, 
the burst duration was > 3s, and the peak flux was > 3 x 10-8 ergs 
cm-2 s-1 (ie > 1 x Crab flux). In the 25-400 keV band, the burst 
duration was > 4s.

A light curve for GRB021112 is provided at the following URL:

http://space.mit.edu/HETE/Bursts/GRB021112/

This message is citable.
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