{
  "bibcode": "2012GCN.13350....1S",
  "body": "A. Sakamoto, M. Tashiro, Y. Terada, W. Iwakiri, T. Yasuda, K. Takahara,\nM. Asahina, S. Kobayashi, H. Ueno (Saitama U.),\nM. Akiyama, N. Ohmori, M. Yamauchi (Univ. of Miyazaki),\nK. Yamaoka, Y. E. Nakagawa (Waseda U.),\nY. Hanabata, T. Kawano, K. Takaki, R. Nakamura, Y.Tanaka, M. Ohno,\nY. Fukazawa (Hiroshima U.), S. Sugita (Nagoya U.), M. Kokubun,\nT. 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 GRB 120519A (IPN; Pal'shin et al., GCN 13313, Konus-Wind;\nGolenetskii et al., GCN 13315) triggered the Suzaku Wide-band All-sky \nMonitor (WAM) which covers an energy range of 50 keV - 5 MeV at \n17:18:14.64 UT (=T0).\n\nThe observed light curve shows a multi-peaked structure starting at\nT0-0.2 s, ending at T0+0.6 s, with a duration (T90) of about 0.72 \nseconds. The fluence in 100 - 1000 keV was 1.45(-0.28 +0.09) x 10^-6 \nerg/cm^2. The 1-s peak flux measured from T0-0.5s was 2.76(-0.33 +0.18) \nphotons/cm^2/s in the same energy range.\n\nPreliminary result shows that the time-averaged spectrum from T0-0.5s to\nT0+0.5s is well fitted by a power-law with exponential cutoff model:\ndN/dE ~ E^{-alpha} * exp(-(2-alpha)*E/Epeak) with\nalpha 0.41(-0.41 +0.58), and Epeak 736(-141 +226) keV\n(chi^2/d.o.f. = 16.9/24).\n\nIn case we fit the same spectrum by a GRB Band model with a fixed\nbeta of 2.5, the best fit parameters and their errors are,\nlow-energy photon index alpha: -0.10(-0.92 +1.60),\nand the peak energy Epeak: 611(-146 +279) keV (chi^2/d.o.f = 20.0/24).\n\n\nAll the quoted errors are at statistical 90% confidence level,\nin which the systematic uncertainties are not included.\n\n----\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": 13350,
  "createdOn": 1338362950000,
  "email": "tashiro@phy.saitama-u.ac.jp",
  "subject": "GRB 120519A: Suzaku WAM observation of the prompt emission",
  "submitter": "Makoto Tashiro at Saitama U/Swift  <tashiro@phy.saitama-u.ac.jp>",
  "eventId": "GRB 120519A"
}