New probes of GRB prompt emission properties using wide-band spectroscopy by Suzaku Wide-band All-sky Monitor

Details New probes of GRB prompt emission properties using wide-band spectroscopy by Suzaku Wide-band All-sky Monitor New probes of GRB prompt emission properties using wide-band spectroscopy by Suzaku Wide-band All-sky Monitor

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1133..338o&link_type=abstract

GAMMA-RAY BURST: Sixth Huntsville Symposium. AIP Conference Proceedings, Volume 1133, pp. 338-343 (2009).

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Gamma-Ray Sources, Gamma-Ray Bursts, X- And Gamma-Ray Telescopes And Instrumentation, Quasars, Active Or Peculiar Galaxies, Objects, And Systems

Scientific paper

Although the afterglow observations in HETE-2 and Swift era have revealed a lot of afterglow properties of gamma-ray bursts (GRBs), we still have poor understanding of the prompt gamma-ray emission, such as the emission mechanism of the prompt emission and differences between short and long duration GRBs. We have observed many prompt emission of GRBs by Suzaku Wide-band All-sky Monitor in wide energy range of 50-5000 keV, with very large effective area of 400 cm2 even at 1 MeV. Furthermore, a combination of the Suzaku/WAM and Swift data provides us not only wider energy range of 15-5000 keV but also redshift information even for some short GRBs. Thanks to these information, we can firstly investigate an intrinsic correlation for short GRBs like Epeak-Liso relation, and we can derive the same type of relation for time-resolved spectra of long GRBs in finer time-scale with higher statistics than ever before. These results could be used to discuss the differences between short and long GRBs, and our time-resolved Epeak-Liso relation also could be used as both more appropriate redshift indicator and new probe of the fireball dynamics.

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