GCN Circular 3013

GRB050209 (=U11568):  A Long GRB Detected by HETE

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

T. Donaghy, E. Fenimore, M. Galassi, C. Graziani, M. Matsuoka, Y. 
Nakagawa, T. Sakamoto, R. Sato, Y. Shirasaki, M. Suzuki, T. Tamagawa, 
Y. Urata, T. Yamazaki, Y. Yamamoto, and A. Yoshida, on behalf of the 
HETE WXM Team;

N. Butler, G. Crew, J. Doty, G. Prigozhin, R. Vanderspek, J. 
Villasenor, J. G. Jernigan, A. Levine, 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;

report that:

Post-processing analysis of HETE data has revealed the presence of 
GRB 050209, an untriggered GRB (=U11568) detected as HETE was 
entering the SAA. The burst was detected at 01:31:41 UT and had a 
duration of approximately 40 seconds.  The GRB has been localized to 
a circle of radius 7' (90% confidence) centered at:

RA = 08h 26m 09s, DEC = +19d 41m 02s (J2000).

Light curves in four spectral bands and a skymap for GRB 050209 are
provided at the following URL:

http://space.mit.edu/HETE/Bursts/GRB050209

Because of the proximity of the SAA, extraction of spectral data 
requires manual processing, and will be provided in a follow-up GCN 
Circular.

This message may be cited.