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GCN Circular 4550

GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
2006-01-21T23:53:39Z (18 years ago)
Don Lamb at U.Chicago <>
GRB 060121:  A bright short/hard GRB localized by HETE-2 WXM

M. Arimoto, G. Ricker, J-L. Atteia, N. Kawai, D. Lamb, and S. Woosley,
on behalf of the HETE Science Team;
T. Donaghy, E. Fenimore, M. Galassi, C. Graziani, N. Ishikawa,
A. Kobayashi, J. Kotoku, M. Maetou, M. Matsuoka, Y. Nakagawa,
T. Sakamoto, R. Sato, T. Shimokawabe, Y. Shirasaki, S. Sugita,
M. Suzuki, T. Tamagawa, K. Tanaka, and A. Yoshida, on behalf of the
N. Butler, G. Crew, J. Doty, G. Prigozhin, R. Vanderspek,
J. Villasenor, J. G. Jernigan, A. Levine, G. Azzibrouck, J. Braga,
R. Manchanda, G. Pizzichini, and S. Gunasekera, 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

At 22:24:54.5 UTC (80694.5 SOD) on 21 January 2006 the HETE FREGATE,
WXM, and SXC instruments detected event H4010, a bright short/hard GRB.

The WXM flight location was distributed in a GCN Notice at 22:25:08 
UTC, 13 seconds after the start of the burst.  Ground analysis of the
WXM data yields a best-fit location

R.A. = +09h 10m 04s ; Dec. = +45d 41' 24" (J2000),

with a 90% confidence error radius of 8 arcminutes.

The T90 duration of the burst is approximately 2 s in the FREGATE
80-400 keV energy band.

Further analyses are in progress.  Further information about this burst
will be available at the following URL:
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