{
  "bibcode": "2009GCN..9483....1N",
  "body": "Y. E. Nakagawa, T. Tamagawa (RIKEN), K. Yamaoka, S. Sugita (Aoyama Gakuin U.),\nT. Uehara, Y. Hanabata, T. Takahashi, Y. Fukazawa (Hiroshima U.), M. Ohno,\nM. Suzuki, M. Kokubun, T. Takahashi (ISAS/JAXA), K. Kono, E. Sonoda, M. Yamauchi,\nN. Ohmori, H. Hayashi, K. Noda, A. Daikyuji, Y. Nishioka (Univ. of Miyazaki),\nW. Iwakiri, M. Tashiro, Y. Terada, A. Endo, K. Onda, T. Sugasahara (Saitama U.),\nY. Urata (NCU), T. Enoto, K. Nakazawa, K. Makishima (Univ. of Tokyo),\nS. Hong (Nihon U.), N. Vasquez (Tokyo Tech.), on behalf of the Suzaku WAM team,\nreport:\n\nThe long GRB 090528 (Fermi/GBM trigger 265176543 / 090528173, von Kienlin et al.,\nGCN 9446) was detected by the Suzaku Wide-band All-sky Monitor (WAM) which\ncovers an energy range of 50 keV - 5 MeV at 04:09:01.00 UT (=T0). The observed\nlight curve shows a single-peaked structure lasting from T0-8s, ending at T0+28s,\nwith a duration (T90) of about 26.0 seconds. \n\nThe fluence in 100 - 1000 keV was 1.9 (+0.2/-0.7) * 10^-6 erg/cm^2.\nThe 1-s peak flux measured from T0+2.5s was 0.5 (+0.2/-0.3) photons/cm^2/s\nin the same energy range.\n\nPreliminary result shows that the time-averaged spectrum from T0-4s to T0+22s\nis well fitted by a single power-law with a photon index of 2.6 (+0.7/-0.5)\n(chi^2/d.o.f = 13/13). All the quoted errors are at statistical 90% confidence\nlevel, in which the systematic uncertainties are not included.\n\nThe light curves for this burst are available at:\n\n http://www.astro.isas.ac.jp/suzaku/research/HXD-WAM/WAM-GRB/grb/untrig/grb_table.html",
  "circularId": 9483,
  "createdOn": 1243994134000,
  "email": "yujin@crab.riken.jp",
  "subject": "GRB 090528: Suzaku WAM observation of the prompt emission",
  "submitter": "Yujin E. Nakagawa at RIKEN  <yujin@crab.riken.jp>",
  "eventId": "GRB 090528"
}