[vsnet-grb-info 10646] GRB 110610A: Suzaku WAM observation of the prompt emission

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  12074
SUBJECT: GRB 110610A: Suzaku WAM observation of the prompt emission
DATE:    11/06/15 09:43:15 GMT
FROM:    Satoshi Sugita at Aoyama Gakuin U.  <sugita at phys.aoyama.ac.jp>

S. Sugita (Nagoya U.), K. Yamaoka (Aoyama Gakuin U.), N. Vasquez (Tokyo Tech.),
T. Uehara, Y. Hanabata, T. Takahashi, M. Ohno, Y. Fukazawa (Hiroshima U.),
Y. Terada, M. Tashiro, W. Iwakiri, K. Takahara, T. Yasuda (Saitama U.),
M. Kokubun, T. Takahashi (ISAS/JAXA),
Y. E. Nakagawa (Waseda U.), N. Ohmori, M. Akiyama, M. Yamauchi (Univ.
of Miyazaki),
Y. Urata, P. Tsai, C-J. Chuang (NCU), K. Nakazawa, K. Makishima (Univ.
of Tokyo),
on behalf of the Suzaku WAM team, report:

The long GRB 110610A (Swift/BAT trigger #455155, GCN 12065; Marshall et al.,)
triggered the Suzaku Wide-band  All-sky Monitor (WAM) which covers an
 energy range of 50 keV - 5 MeV at 15:22:6.198 UT (=T0).

The observed light curve shows a multi-peaked structure starting at
T0-53s, ending
 at T0+10s with a duration  (T90) of 47 +/- 10 seconds.
 The fluence in 100 - 1000 keV was  4.57 (-0.60, +0.53) x 10^-6 erg/cm^2.
 The 1-s peak flux measured from T0+1s was 1.44 +/- 0.15
photons/cm^2/s in the same  energy range.

result shows that the time-averaged spectrum from T0-53s to
T0+10s is well fitted by a single power-law with a photon index
of 2.07 (-0.13, 0.15) (chi^2/d.o.f = 34.5/26).

All the quoted errors are at statistical 90% confidence level.

The light curves for this burst are available at:
 http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html