{
  "bibcode": "2007GCN..6810....1B",
  "body": "L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC),\nE. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA),\nC. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC),\nT. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU),\nJ. Tueller (GSFC), T. Ukwatta (GWU)\non behalf of the Swift-BAT team,\n\nM. Ohno, T. Uehara, T. Takahashi, Y. Fukazawa, C. Kira (Hiroshima U.),\nY. E. Nakagawa, K. Yamaoka, S. Sugita (Aoyama Gakuin U.),\nY. Terada, T. Tamagawa (RIKEN), K. Morigami, N. Kodaka, K. Onda,\nM. Tashiro, M. Suzuki, Y. Urata, A. Endo (Saitama U.), T. Enoto,\nR. Miyawaki, K. Nakawaza, K. Makishima (Univ. of Tokyo), E. Sonoda,\nM. Yamauchi, S. Maeno, H. Tanaka, R. Hara (Univ. of Miyazaki),\nM. Kokubun, M. Suzuki, T. Takahashi (ISAS/JAXA), S. Hong (Nihon U.),\non behalf of the Suzaku-WAM team,\n\nreport:\n\nWe performed the Swift/BAT, and Suzaku/WAM joint fit spectral\nanalysis of GRB 070911 (Swift-BAT trigger #290624; Krimm, et al.,\nGCN Circ. 6777).  The time interval of the spectral data for each\ninstrument is chosen from T0(WAM)-56 to T0(WAM)+149 sec where\nT0(WAM) is the trigger time of WAM at 05:58:20.069 UTC.\nThe energy ranges which we used in the joint spectral analysis\nare 14-150 keV and 100-1000 keV for Swift/BAT and Suzaku/WAM\nrespectively.  The spectral data of two instruments are fit\nwith the spectral model multiplied by the constant factor to\ntake into account the systematic uncertainties in the response\nmatrices of each instrument.\n\nThe spectrum is well fit with a power-law with exponential cutoff\nmodel (dN/dE ~ E^{alpha} * exp(-(2+alpha)*E/Epeak)).  The constant\nfactors of each instrument agree within 10%.  No systematic residual\nfrom the best fit model is seen in the spectral data of each instrument.\nThe best fit spectral parameters are: alpha = -1.6 +- 0.1 and\nEpeak = 170 (-50/+280) keV (chi2/dof = 59/74).  The energy fluence\nin the 15-1000 keV band calculated by a power-law with exponential\ncutoff model for this 205 sec interval is 2.1 (-0.2/+0.4) x 10^-5 erg/cm2\n(assuming the constant factor of the BAT is fixed to 1).\n\nAll the quoted errors are at the 90% confidence level.",
  "circularId": 6810,
  "createdOn": 1190380484000,
  "email": "takanori@milkyway.gsfc.nasa.gov",
  "subject": "GRB 070911: Swift/BAT and Suzaku/WAM joint spectral analysis",
  "submitter": "Takanori Sakamoto at NASA/GSFC  <takanori@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 070911"
}