[vsnet-grb-info 6310] GRB 080625: Suzaku WAM observation of the prompt emission

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7930
SUBJECT: GRB 080625: Suzaku WAM observation of the prompt emission
DATE:    08/07/03 03:43:57 GMT
FROM:    Takeshi Uehara at Hiroshima U  <uehara at hirax7.hepl.hiroshima-u.ac.jp>

T. Uehara, Y. Hanabata, Y. Fukazawa, T. Takahashi, C. Kira (Hiroshima U.), 
M. Ohno, M. Kokubun, M. Suzuki, T. Takahashi (ISAS/JAXA),
K. Yamaoka, S. Sugita (Aoyama Gakuin U.),
K. Onda, M. Tashiro, Y. Terada, Y. Urata, A. Endo, N. Kodaka,
K. Morigami, T. Sugasahara, W. Iwakiri (Saitama U.),
Y. E. Nakagawa, T. Tamagawa (RIKEN), T. Enoto, K. Nakazawa, 
K. Makishima (Univ. of Tokyo), E. Sonoda, M. Yamauchi, H. Tanaka, 
R. Hara (Univ. of Miyazaki), S. Hong (Nihon U.),
on behalf of the Suzaku WAM team, report:

The long GRB 080625 (SuperAGILE ; Marco et al., GCN 7903)
was detected by the the Suzaku Wide-band  All-sky Monitor (WAM) which covers an
energy range of 50 keV - 5 MeV at 12:28:41 UT on 25 July 2008 (=T0).

The observed light curve shows a single peak, starting at T0s, ending
at T0+62s with a duration
(T90) of about 62 seconds. The fluence in 100 - 1000 keV was 2.3(+1.3/-0.7) E-6 erg/cm^2.
The 1-s peak flux measured from T0+33s was 0.4(+0.2/-0.3) photons/cm^2/s in the same
energy range.

Preliminary result shows that the time-averaged spectrum from T0-15s to
T0+50s is well fitted by a single power-law with a photon index
of 1.7 (+1.2/-0.8) (chi^2/d.o.f = 9.6/8) at the 120 - 500 keV bandpass.

All the quoted errors are at statistical 90% confidence level,
in which the systematic uncertainties are not included.

The light curves with 1-sec time resolution for this burst will be appeared at:

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