The Interpretation and Uses of E_peak from Gamma-Ray Burst Spectra

Details The Interpretation and Uses of E_peak from Gamma-Ray Burst Spectra The Interpretation and Uses of E_peak from Gamma-Ray Burst Spectra

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.0203p&link_type=abstract

American Astronomical Society, HEAD meeting #11, #2.03; Bulletin of the American Astronomical Society, Vol. 41, p.653

Astronomy and Astrophysics

Astronomy

Scientific paper

The completion of the BATSE 5B Spectroscopy Catalog, containing peak flux and fluence spectral fits for 2141 gamma-ray bursts observed by BATSE, allows for unprecedented studies of the spectral shape parameters that may lead to a better understanding of the emission properties of bursts. I will focus on the properties of E_peak. First of all, the reported narrow width of the observed distribution must be verified, as well as the general trend of the distribution centroid as a function of observed intensity. Next, I will look at the the newly-found hardness/fluence ratio classification parameter, where E_peak plays a key role. Finally, I will examine new physical interpretations for E_peak, in light of recent Fermi observations.

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