A New Discriminator for Gamma-Ray Burst Classification: The Epeak-Fluence Energy Ratio

Details A New Discriminator for Gamma-Ray Burst Classification: The Epeak-Fluence Energy Ratio A New Discriminator for Gamma-Ray Burst Classification: The Epeak-Fluence Energy Ratio

2010-09-10

arxiv.org/abs/1009.2105v1

Astrophysical Journal 721 (2010) 1329-1332

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

8 pages, 3 figures, accepted for publication in ApJ

Scientific paper

10.1088/0004-637X/721/2/1329

Using the derived gamma-ray burst E_peak and fluences from the complete BATSE 5B Spectral Catalog, we study the ensemble characteristics of the E_peak-fluence relation for GRBs. This relation appears to be a physically meaningful and insightful fundamental discriminator between long and short bursts. We discuss the results of the lower limit test of the E_peak-E_iso relations in the E_peak-fluence plane for BATSE bursts with no observed redshift. Our results confirm the presence of two GRB classes as well as heavily suggesting two different GRB progenitor types.

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