[vsnet-grb-info 12902] GRB 130215A: Suzaku WAM observation of the prompt emission

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14245
SUBJECT: GRB 130215A: Suzaku WAM observation of the prompt emission
DATE:    13/02/21 09:10:52 GMT
FROM:    Makoto Tashiro at Saitama U/Swift  <tashiro at phy.saitama-u.ac.jp>

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

The long GRB 130215A (Elia et al GCN14204; George et al GCN14219) was
detected by the the Suzaku Wide-band All-sky Monitor (WAM) which covers
an energy range of 50 keV - 5 MeV at 01:31:25.437 UT (=T0).

The observed light curve shows a single peak with a duration (T90) of
about 46.0 seconds. The fluence in 100 - 1000 keV was
1.04 (+0.13/-0.13) x 10^-5 erg/cm^2.
The 1-s peak flux measured from T0+1 s was
0.69 (+0.28/-0.36) photons/cm^2/s in the same energy range.

Preliminary result shows that the time-averaged spectrum from T0-7 s to
T0+55 s is well fitted by a single power-law with a photon index of
1.61 (+0.08/-0.07) (chi2/d.o.f = 13.9/14).

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

The light curves for this burst will be available at:

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