A universal scaling for short and long gamma-ray bursts: EX,iso−Eγ ,iso−Epk

M. G. Bernardini*, Raffaella Margutti, E. Zaninoni, G. Chincarini

*Corresponding author for this work

Research output: Contribution to journalConference article

Abstract

The comprehensive statistical analysis of Swift X-ray light-curves, collecting data from six years of operation, revealed the existence of a universal scaling among the isotropic energy emitted in the rest frame 1 − 104 keV energy band during the prompt emission (Eγ ,iso), the rest frame peak of the prompt emission energy spectrum (Epk), and the X-ray energy emitted in the rest frame 0.3 − 30 keV observed energy band (EX,iso). We show that this scaling is shared by long, short, and low-energetic GRBs, and thus reflects the existence of some properties which are shared by the GRB class as a whole. A simpler and more physically intuitive form the relation could be expressed is as a two-parameter correlation between the GRB efficiency and Epk.

Original languageEnglish (US)
JournalProceedings of Science
Volume2012-May
StatePublished - Jan 1 2012
Event2012 Gamma-Ray Bursts Conference, GRB 2012 - Munich, Germany
Duration: May 7 2012May 11 2012

ASJC Scopus subject areas

  • General

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