[vsnet-grb-info 4098] GRB 061202: Suzaku WAM observation of the prompt emission

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  5907
SUBJECT: GRB 061202: Suzaku WAM observation of the prompt emission
DATE:    06/12/11 16:06:02 GMT
FROM:    Kazutaka Yamaoka at Aoyama Gakuin U  <yamaoka at phys.aoyama.ac.jp>

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

The bright, long burst, GRB 061202 (Sakamoto et al., GCN 5886; 5887),
triggered the Suzaku Wide-band All-sky Monitor (WAM),
which covers the energy range of 50 keV - 5 MeV, at 08:12:59.625 (UT).
A FRED type peak and following weak and broad hump were seen in the 
 WAM light curve. The T90 duration was about 64 seconds. The fluence 
in 100 - 500 keV was (5.0 +- 0.6)x10^-6 erg/cm2, while the 1-s peak
flux was 0.80 +- 0.05 photons/cm2/s in the same energy range.

Preliminary result shows that the spectrum of the main peak, integrated
during T0 to T0+50s is well-described with a single power-law model with 
the photon index of 1.78 (-0.22, +0.21). 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