{
  "bibcode": "2009GCN.10168....1O",
  "body": "M. Ohno, M. Suzuki, M. Kokubun, T. Takahashi (ISAS/JAXA),\nK. Yamaoka (Aoyama Gakuin U.), S. Sugita (Nagoya U.), Y. E. Nakagawa,\nT. Tamagawa (RIKEN), S. Hong (Nihon U.), N. Vasquez (Tokyo Tech.),\nN. Ohmori, E. Sonoda, K. Kono, H. Hayashi, A. Daikyuji,\nY. Nishioka, K. Noda, M. Yamauchi (Univ. of Miyazaki),\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, H.M Lin (NCU),\nT. Enoto, K. Nakazawa, K. Makishima (Univ. of Tokyo),\non behalf of the Suzaku WAM team, report:\n\n\nThe short GRB 091109B (Swift/BAT trigger #375409 ; Oates et al., GCN  \n10148)\ntriggered the Suzaku Wide-band  All-sky Monitor (WAM) which covers an\n  energy range of 50 keV - 5 MeV at 2009-11-09 21:49:02.83 UT (=T0).\n\nThe observed light curve shows a single peak starting at T0+0.3s, ending\n  at T0+0.6s with a duration (T90) of about 0.19 seconds.\nThe fluence in 100 - 1000 keV was 9.98(-3.69,+0.72) x 10^-7 erg/cm^2.\n  The 1-s peak flux measured from T0 was 1.75(-0.59,+0.14) photons/ \ncm^2/s\nin the same energy range.\n\nPreliminary result shows that the time-averaged spectrum from\nT0s to T0+1s is well fitted by a power-law with exponential cutoff  \nmodel:\n   dN/dE ~  E^{-alpha} * exp(-(2-alpha)*E/Epeak) with\n   alpha       0.91(-0.78,+0.42), and\n   Epeak       1330(-610,+1120) keV (chi^2/d.o.f. = 24.6/24).\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 are available at:\n\n  http://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html",
  "circularId": 10168,
  "createdOn": 1258191039000,
  "email": "ohno@astro.isas.jaxa.jp",
  "subject": "GRB 091109B: Suzaku WAM observation of the prompt emission",
  "submitter": "Masanori Ohno at ISAS/JAXA  <ohno@astro.isas.jaxa.jp>",
  "eventId": "GRB 091109B"
}