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GCN Circular 2211

Subject
GRB030429 (=H2695): A Long GRB Localized by the HETE WXM and SXC
Date
2003-05-06T19:25:01Z (21 years ago)
From
Don Lamb at U.Chicago <lamb@oddjob.uchicago.edu>
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
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