M. Ohno, T. Takahashi, Y. Fukazawa (Hiroshima U.),
K. Yamaoka, S. Sugita (Aoyama Gakuin U.),
Y. Terada, T. Tamagawa (RIKEN), S. Hong (Nihon U.),
K. Abe, Y. Endo, K. Onda, M. Tashiro (Saitama U.),
G. Sato, K. Nakazawa, T. Takahashi (ISAS/JAXA),
R. Miyawaki, M. Kokubun, K. Makishima (Univ. of Tokyo)
and the HXD-II team report:
The short hard burst, GRB 060429 (Hurley et al., GCN 5039,
Golenetskii et al., GCN 5067), triggered the Suzaku
Wide-band All-sky Monitor (WAM) which is sensitive to an
energy band of 50 keV - 5 MeV at 12:19:51 (UT).
The observed light curve shows a single-peak structure
with a duration (T90) of 0.11 seconds.
The fluence in 100 - 1000 keV was 1.97 +- 0.17 X10^-6 erg/cm2.
The 1-sec peak flux was 3.2 +- 0.3 photons/cm2/sec
in the same energy range.
Preliminary result shows that the time-averaged spectrum
is well fitted by a single power law with a photon index
of 1.07 +- 0.13.
All the quoted errors are at statistical 90% confidence level.
The WAM in-flight calibration is still under way, and systematic
errors, such as the flux calibration uncertainties of about 20%,
are not included in the errors.
The WAM light curve of this event is available at
Further detailed analysis and the refinement are in progress.