GCN Circular 12074
Subject
GRB 110610A: Suzaku WAM observation of the prompt emission
Date
2011-06-15T09:43:15Z (13 years ago)
From
Satoshi Sugita at Aoyama Gakuin U. <sugita@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