{
  "bibcode": "2012GCN.13874....1T",
  "body": "K. Takaki, Y. Hanabata,  T. Kawano, Y.Tanaka, R. Nakamura, M. Ohno,\nY. Fukazawa (Hiroshima U.),\nA. Sakamoto, M. Tashiro, Y. Terada, W. Iwakiri, T. Yasuda, K. Takahara,\nM. Asahina, S. Kobayashi, H. Ueno (Saitama U.),\nM. Akiyama, N. Ohmori, E. Mochinaga, M. Yamauchi (Univ. of Miyazaki),\nY. E. Nakagawa (Waseda U.), S. Sugita (Nagoya U.), K. Yamaoka,\nM. Kokubun, T. Takahashi (ISAS/JAXA), Y. Urata, P. Tsai (NCU), K. Nakazawa,\nK. Makishima (Univ. of Tokyo), on behalf of the Suzaku WAM team, report:\n\nThe short, IPN localized GRB 121011B (Golenetskii et al., GCN 13863)\n\ntriggered the Suzaku Wide-band  All-sky Monitor (WAM) which covers an\nenergy range of 50 keV - 5 MeV at 22:32:22.753 UT (=T0).\nThe observed light curve shows  a single peak structure starting at\nT0 s, ending at T0+0.5 s,  with a duration (T90) of about 0.28 seconds.\nThe fluence in 100 - 1000 keV was 1.21 (-0.07, +0.15) x 10^-6 erg/cm^2\nThe 1-s peak flux measured from T0-0.5s  was 2.10 (-0.26, +0.15)\nphotons/cm^2/s in the same  energy range.\n\nPreliminary result shows that the time-averaged spectrum from T0 to\nT0+0.5s is well fitted by a power-law with exponential cutoff model:\n   dN/dE ~  E^{-alpha} * exp(-(2-alpha)*E/Epeak) with\n   alpha       0.45 (-0.59, +0.50), and\n   Epeak       810 (-139, 229) keV (chi^2/d.o.f. = 31.1/24).\n\nWe also shows the results with the same spectrum fitted by a GRB Band\nmodel,\nthe low-energy photon index alpha: -0.39 (-0.53, +0.68),\nthe high-energy photon index beta: <-2.33\nand the peak energy Epeak: 778 (-163, +237) keV\n(chi^2/d.o.f = 30.3/23).\n\nAll the quoted errors are at statistical 90% confidence level,\nin which the systematic uncertainties are not included.\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": 13874,
  "createdOn": 1350378176000,
  "email": "ohno@hep01.hepl.hiroshima-u.ac.jp",
  "subject": "GRB 121011B: Suzaku WAM observation of the prompt emission",
  "submitter": "Masanori Ohno at Hiroshima U  <ohno@hep01.hepl.hiroshima-u.ac.jp>",
  "eventId": "GRB 121011B"
}