GCN Circular 2211

J. Doty, R. Vanderspek, N. Butler, G. Crew, J. Villasenor, G. Monnelly,
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;

Y. Shirasaki, C. Graziani, T. Donaghy, M. Matsuoka, M. Suzuki, T.
Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,
T. Tavenner, Y. Nakagawa, D. Takahashi, 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;

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

write:

At 10:42:22.68 UTC (38542.68 s UT) on 29 April 2003, the HETE FREGATE,
WXM, and SXC instruments detected event H2695, a long GRB.

The burst triggered FREGATE in the 30-400 keV energy band.  No
real-time localization was sent to the GCN, since the weak fluence of
the burst in the WXM energy band resulted in a location that did not
meet the criteria for automatic propagation, and which was, in fact,
incorrect.

Ground analysis of the WXM data produced a localization that was
reported in a GCN Notice at 12:34:28 UT, 112 minutes after the burst.
The WXM ground localization SNR was 6.  The localization can be
expressed as a 90% confidence rectangle, whose center is at:

WXM-Ground: R.A. = 12h 13m 18s, Dec. = -20d 51' 09" (J2000),

and whose corners lie at:

R.A. =  12h 13m 32s, Dec. = -21d 01' 55"
R.A. =  12h 12m 50s, Dec. = -20d 59' 56"
R.A. =  12h 13m 03s, Dec. = -20d 40' 26"
R.A. =  12h 13m 46s, Dec. = -20d 42' 22" (J2000).

Ground analysis of the SXC data produced a localization that was
reported in the same GCN notice.  The SXC ground localization SNR was
6.  The localization can be expressed as a 90% confidence circle that
is 2 arcminutes in radius and is centered at:

R.A. = 12h 13m 06s, Dec. = -20d 56' 00" (J2000).

(The GCN Notice incorrectly reported the radius as 1 arcminute due to
operator error.)

The T_90 duration of the burst in the 30-400 keV band was > 14 s.

A light curve and skymap for GRB030429 is provided at the following
URL:

http://space.mit.edu/HETE/Bursts/GRB030429