{
  "bibcode": "2013GCN.14700....1I",
  "body": "W. Iwakiri(RIKEN), M. Tashiro, Y. Terada, T. Yasuda, Y. Ishida, H. Ueno,\nS. Sugimoto (Saitama U.),\nM. Ohno, K. Takaki, T. Kawano, R. Nakamura, S. Furui, Y. Fukazawa\n(Hiroshima U.),\nM. Yamauchi, N. Ohmori, M. Akiyama (Univ. of Miyazaki),\nK. Yamaoka (Nagoya U.), S. Sugita (Ehime U.), Y. E. Nakagawa, M. Kokubun,\nT. Takahashi (ISAS/JAXA), Y. Hanabata (ICRR),\nY. Urata (NCU), K. Nakazawa, K. Makishima (Univ. of Tokyo)\non behalf of the Suzaku WAM team, report:\n\nThe long, IPN localized GRB 130521B (Hurley et al., GCN 14696;\nKonus-Wind detection : Golenetskii et al., GCN 14698) triggered the\nSuzaku Wide-band All-sky Monitor (WAM) which covers an energy range of\n50 keV - 5 MeV at 21:24:31.599 UT (=T0).\n\nThe observed light curve shows a multi-peaked structure starting at\nT0-0s, ending at T0+25 s with a duration (T90) of about 23 seconds. The\nfluence in 100 - 1000 keV was 1.21 (+0.07/-0.08) x 10^-5 erg/cm^2. The\n1-s peak flux measured from T0+1 s was 4.25 (+1.63/-0.54) photons/cm^2/s\nin the same energy range.\n\nPreliminary result shows that the time-averaged spectrum from T0-0s to\nT0+25 s is well fitted by a single power-law with a photon index of 2.33\n(+0.19/-0.16) (chi^2/d.o.f = 30.0/25).\n\nAll the quoted errors are at statistical 90% confidence level,in which\nthe systematic uncertainties are not included.\n\nThe light curves for this burst are available at:\n\nhttp://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html",
  "circularId": 14700,
  "createdOn": 1369402581000,
  "email": "ohno@hep01.hepl.hiroshima-u.ac.jp",
  "subject": "GRB 130521B: Suzaku WAM observation of the prompt emission",
  "submitter": "Masanori Ohno at Hiroshima U  <ohno@hep01.hepl.hiroshima-u.ac.jp>",
  "eventId": "GRB 130521B"
}