GCN Circular 2713

GRB040916 (= H3558):  Improved Localization from HETE WXM

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

N. Butler, G. Crew, J. Doty, A. Dullighan, 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;

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

report:


By utilizing the WXM data from both peaks of GRB040916 (= H3558; 
Yamazaki et al, GCN2712
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 ), the localization of this unusual XRF has 
been refined to an 90% confidence error box with corners at the 
following coordinates (J2000):

RA = 23 02 01.68,         Dec = -05 50 09.6
RA = 23 00 23.76,         Dec = -05 37 51.6
RA = 23 00 58.80,         Dec = -05 19 51.6
RA = 23 02 36.72,         Dec = -05 32 09.6

The area of the error box is 545 square arc minutes.

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