{
  "bibcode": "2014GCN.15722....1I",
  "body": "W. Iwakiri (RIKEN), M. Tashiro, Y. Terada, T. Yasuda, Y. Ishida, H. Ueno,\nS. Sugimoto (Saitama U.), M. Yamauchi, N. Ohmori, M. Akiyama,\nR. Kinoshita (Univ. of Miyazaki), M. Ohno, K. Takaki, T. Kawano,\nR. Nakamura, S. Furui, Y. Fukazawa (Hiroshima U.), K. Yamaoka (Nagoya U.),\nS. Sugita (Ehime U.), Y. E. Nakagawa, M. Kokubun, T. Takahashi (ISAS/JAXA),\nY. Hanabata (ICRR), Y. Urata (NCU), K. Nakazawa, K. Makishima (Univ. of Tokyo)\non behalf of the Suzaku WAM team, report:\n\n\nThe long GRB 140104B (Fermi-LAT detection: Vianello et al., GCN 15684;\nFermi-GBM observation: Xiong, GCN 15687) triggered the Suzaku Wide-band\nAll-sky Monitor (WAM) which covers an energy range of 50 keV - 5 MeV at\n17:32:13.926 UT (=T0).\n\nThe observed light curve shows a multi-peaked structure starting at\nT0-14 s, ending at T0+200 s with a duration (T90) of about 185 seconds.\nThe fluence in 100 - 1000 keV was 1.86 (+0.83/-0.77) x 10^-5 erg/cm^2.\nThe 1-s peak flux measured from T0+179 s was 1.34 (+0.52/-0.45)\nphotons/cm^2/s in the same energy range.\n\nPreliminary result shows that the time-averaged spectrum from\nT0-14 s to T0+200 s is well fitted by a power-law with exponential cutoff model:\ndN/dE ~ E^{-alpha} * exp(-(2-alpha)*E/Epeak) with\nalpha 0.42 (+1.17/-1.78), and\nEpeak 351 (+75/-102) keV (chi^2/d.o.f. = 12.5/14).\n\nAll the quoted errors are at statistical 90% confidence level.\n\nThe light curves for this burst are available at:\nhttp://www.astro.isas.jaxa.jp/suzaku/HXD-WAM/WAM-GRB/grb/trig/grb_table.html",
  "circularId": 15722,
  "createdOn": 1389452763000,
  "email": "yasuda@heal.phy.saitama-u.ac.jp",
  "subject": "GRB 140104B: Suzaku WAM observation of the prompt emission",
  "submitter": "Tetsuya Yasuda at Saitama U  <yasuda@heal.phy.saitama-u.ac.jp>",
  "eventId": "GRB 140104B"
}