[vsnet-grb-info 4217] GRB 070107: Suzaku WAM observation of the prompt emission

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  6016
SUBJECT: GRB 070107: Suzaku WAM observation of the prompt emission
DATE:    07/01/13 07:02:33 GMT
FROM:    Masanori Ohno at Hiroshima U  <ohno at hirax7.hepl.hiroshima-u.ac.jp>

T. Takahashi, M. Ohno, T. Asano, T. Uehara, Y. Fukazawa (Hiroshima U.),
Y. Urata, M. Tashiro, K. Abe, K. Onda, Y. Sato, M. Suzuki (Saitama U.),
K. Yamaoka, S. Sugita (Aoyama Gakuin U.), T. Enoto, R. Miyawaki, 
K. Makishima (Univ. of Tokyo), M. Suzuki, T. Tamagawa, Y. Terada (RIKEN),
K. Nakazawa, M. Kokubun, T. Takahashi, (ISAS/JAXA), S. Hong (Nihon U.),
on behalf of the Suzaku WAM team report:

The long GRB 070107 (Stamatikos et al., GCN 5999; Barthelmy et al., 
GCN 6001) triggered the Suzaku Wide-band All-sky Monitor (WAM), 
which covers the energy range of 50 keV - 5 MeV, at 12:05:06 UT(=T0). 
The light curve shows double peaks with a total duration of 
about 92 seconds. The fluence in 100 - 1000 keV of the burst was 
1.57 +- 0.13 x 10^-5 erg/cm2, while the 1-s peak flux was 
1.18 (-0.13, +0.14) photons/cm2/s in the same energy range.

The time-averaged spectrum from T0-66 sec to T0+94 sec is well fitted
by a single power-law model. The power-law photon index of its spectrum 
is 1.75 (-0.13,+0.15). All the quoted errors are at statistical 90%
confidence level, while systematic errors are not included.
 
The WAM light curve of this event is available at
http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/grb_table.html