[vsnet-grb-info 13589] GRB 130614A: Suzaku WAM observation of the prompt emission

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14918
SUBJECT: GRB 130614A: Suzaku WAM observation of the prompt emission
DATE:    13/06/22 11:06:17 GMT
FROM:    Makoto Tashiro at Saitama U/Swift  <tashiro at phy.saitama-u.ac.jp>

S. Sugimoto, M. Tashiro, Y. Terada, T. Yasuda, H. Ueno, Y. Ishida
(Saitama U.), M. Ohno, K. Takaki, T. Kawano, R. Nakamura, S. Furui,
Y. Fukazawa (Hiroshima U.), M. Yamauchi, N. Ohmori, M. Akiyama
(Univ. of Miyazaki), K. Yamaoka (Nagoya U.),  S. Sugita (Ehime U.),
Y. E. Nakagawa, M. Kokubun, T. Takahashi (ISAS/JAXA), W. Iwakiri
(RIKEN), Y. Hanabata (ICRR), Y. Urata (NCU), K. Nakazawa, K. Makishima
(Univ. of Tokyo) on behalf of the Suzaku WAM team, report:

The short GRB 130614A (Xiong, GCN 14903) was detected by the the Suzaku
Wide-band All-sky Monitor (WAM) which covers an energy range of
50 keV - 5 MeV at 23:56:9.064 UT (=T0).

The observed light curve shows a single FRED-like peak starting at
T0-1 s,ending at T0+9 s with a duration (T90) of about 4.9 seconds.
The fluence in 100 - 1000 keV was 3.08(+0.34/-0.31)*10^-6 erg/cm^2.
The 1-s peak flux measured from T0+1s was
2.41 (+0.35/-2.9) photons/cm^2/s in the same energy range.

Preliminary result shows that the time-averaged spectrum from T0-1 s to
T0+9 s is well fitted by a single power-law with a photon index
of 2.42 (+0.28/-0.24) (chi^2/d.o.f = 17.6/17).

All the quoted errors are at statistical 90% confidence level,

The light curves for this burst are available at:

http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html