[vsnet-grb-info 3886] GRB 061006 : Suzaku/WAM observation of the prompt emission

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  5717
SUBJECT: GRB 061006 : Suzaku/WAM observation of the prompt emission
DATE:    06/10/08 10:31:51 GMT
FROM:    Yuji Urata at Saitama U  <urata at crystal.heal.phy.saitama-u.ac.jp>

Y. Urata, M. Tashiro, K. Abe, K. Onda, Y. Sato, M. Suzuki (Saitama U)
M. Ohno, T. Takahashi, T. Asano, T. Uehara, Y. Fukazawa (Hiroshima U), 
K. Yamaoka, S. Sugita (Aoyama Gakuin U), Y. Terada, T. Tamagawa, 
M. Suzauki (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 short duration GRB 061006 (Schady et al. #5699, Hurley #5702 ),
triggered the Suzaku Wideband All-sky Monitor (WAM), which covers the
energy range of 50 keV - 5 MeV, at 16:45:27 UT October 6, 2006.  The
duration T90 was about 0.42 second. The fluence in 100 - 1000 keV of
the burst was about 2.55 x 10-6 erg/cm2. Preliminary result shows that
the time-averaged spectrum is well described by a power law with an
exponential cutoff as follows.

  dN/dE ~  E^{-alpha} * exp(-(2-alpha)*E/Epeak)
  alpha       0.75 (-0.34, +0.28), and
  Epeak       966  (-208,   +386) keV.

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 "