{
  "bibcode": "2009GCN..9505....1O",
  "body": "N. Ohmori, E. Sonoda, K. Kono, H. Hayashi, K. Noda, A. Daikyuji, \nY. Nishioka, M. Yamauchi (Univ. of Miyazaki),\nM. Ohno, M. Suzuki, M. Kokubun, T. Takahashi (ISAS/JAXA),\nK. Yamaoka, S. Sugita (Aoyama Gakuin U.), Y. E. Nakagawa,\nT. Tamagawa (RIKEN), S. Hong (Nihon U.), N. Vasquez (Tokyo Tech.),\nY. Hanabata, T. Uehara, T. Takahashi, Y. Fukazawa (Hiroshima U.),\nW. Iwakiri, M. Tashiro, Y. Terada, A. Endo, K. Onda,\nT. Sugasahara (Saitama U.), Y. Urata (NCU),\nT. Enoto, K. Nakazawa, K. Makishima (Univ. of Tokyo),\non behalf of the Suzaku WAM team, report:\n\nThe long GRB 090602 (Fermi-GBM trigger 265642344 / 090602564;\nBissaldi et al., GCN9486) triggered the Suzaku Wide-band All-sky \nMonitor (WAM) which covers an energy range of 50 keV - 5 MeV\nat 13:32:23.291 UT (=T0).\n\nThe observed light curve shows a bright multi-peaked structure\nstarting at T0-1 s, ending at T0+12 s. \nThe total T90 duration is about 10 seconds.\n\nThe fluence in 100 - 1000 keV was 3.7 (-1.6, +0.4) x10-6 erg/cm2.\nThe 1-s peak flux measured from T0+3s was 1.0 (-0.7, +0.3)\nphotons/cm2/s in the same energy range.\n\nPreliminary result shows that the time-averaged spectrum from\nT0-1s to T0+11s is well fitted by a power-law with exponential cutoff model:\n  dN/dE ~  E^{-alpha} * exp(-(2-alpha)*E/Epeak) with\n  alpha       0.79(-0.79, +0.95), and\n  Epeak        581(+954,-195) keV (chi2/d.o.f. = 52.9/45).\n\nAll the quoted errors are at statistical 90% confidence level,\nin which the systematic uncertainties are not included.\n\nThe light curves for this burst is available at:\nhttp://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html",
  "circularId": 9505,
  "createdOn": 1244799159000,
  "email": "ohmori@astro.miyazaki-u.ac.jp",
  "subject": "GRB 090602: Suzaku WAM observation of the prompt emission",
  "submitter": "Norisuke Ohmori at Miyazaki U  <ohmori@astro.miyazaki-u.ac.jp>",
  "eventId": "GRB 090602"
}