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

Abstract

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.

8 pages, 3 figures, accepted for publication in ApJ

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Cited by in corpus (21)

• The Afterglows of Swift-era Gamma-Ray Bursts II.: Type I GRB versus Type II GRB Optical Afterglows
• Spectral properties of 438 GRBs detected by Fermi/GBM
• Discovery and confirmation of the shortest gamma ray burst from a collapsar
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• The BATSE 5B Gamma-Ray Burst Spectral Catalog
• Revisiting the Long/Soft-Short/Hard Classification of Gamma-Ray Bursts in the Fermi Era
• Gamma-ray burst prompt correlations: selection and instrumental effects
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• Short vs. Long Gamma-Ray Bursts: A Comprehensive Study of Energetics and Prompt Gamma-Ray Correlations
• Gamma Ray Burst Prompt correlations
• The Epeak-Eiso relation revisited with Fermi GRBs: Resolving a long-standing debate?
• Statistical classification of gamma-ray bursts based on the Amati relation
• A comprehensive statistical study on gamma-ray bursts
• Radial Angular Momentum Transfer and Magnetic Barrier for Short-Type Gamma-Ray Burst Central Engine Activity
• A Significant Problem With Using the Amati Relation for Cosmological Purposes
• Broad band time-resolved E_{p,i}--L_{iso} correlation in GRBs
• On Spectral Peak Energy of Swift Gamma-Ray Bursts
• Observing the prompt emission of gamma-ray bursts
• Spectral evolution of long Gamma Ray Burst prompt emission: electrostatic acceleration and adiabatic expansion
• GRB minimum variability timescales with Fermi/GBM