Correlative Analysis of GRBs detected by Swift and Suzaku-WAM

Hans Krimm*, Kazutaka Yamaoka, Masanori Ohno, Makoto Tashiro, Kaori Onda, Goro Sato, Takanori Sakamoto, Satoshi Sugita

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Since most gamma-ray bursts (GRBs) have a peak energy (Epeak) above the energy range (15-150 keV) of the Burst Alert Telescope (BAT) on Swift, a full understanding of the prompt emission from Swift GRBs requires spectral fits over as broad an energy range as possible. This can be done for bursts which are simultaneously detected by Swift BAT and the Suzaku Wide-band All-Sky Monitor (WAM), which covers the energy range from 50-5000 keV. Since the launch of Suzaku in July 2005, there have been 33 gamma-ray bursts (GRBs) which have triggered both Swift and WAM. A joint BAT-WAM team has cross-calibrated the two instruments using GRBs, and we are now able to perform joint fits on these bursts to determine spectral parameters including Epeak. The results of broad spectral fits allows us to understand the distribution of Epeak for Swift bursts and to calibrate Epeak estimators when Epeak is within the BAT energy range. For those bursts with spectroscopic redshifts, we can calculate the isotropic energy and study various correlations between Epeak and other global burst parameters. Here we present preliminary results of joint Swift/BAT-Suzaku/WAM spectral fits.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Number of pages4
Publication statusPublished - 2008
EventSanta Fe Conference on Gamma-Ray Bursts 2007, GRB 2007 - Santa Fe, NM
Duration: 2007 Nov 52007 Nov 9


OtherSanta Fe Conference on Gamma-Ray Bursts 2007, GRB 2007
CitySanta Fe, NM


  • bursts
  • gamma rays

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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