Can we trust GRB high energy correlations?

Nathaniel R. Butler, Daniel Kocevski, Joshua S. Bloom

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We show that several GRB correlations have common features indicative of an origin in selection effects. We focus on the possible origin of the E pk-Eiso correlation in Swift data due to detector threshold truncation. The existence of faint Swift events calls into question inferences based on pre-Swift surveys which must be subject to complicated incompleteness effects. Also, we show that the Epk-E γ (Ghirlanda) correlation is effectively independent of the GRB redshifts z, which suggests it contains little intrinsic physics.

Original languageEnglish (US)
Title of host publicationGamma-Ray Bursts 2007 - Proceedings of the Santa Fe Conference
Number of pages4
StatePublished - 2008
Externally publishedYes
EventSanta Fe Conference on Gamma-Ray Bursts 2007, GRB 2007 - Santa Fe, NM, United States
Duration: Nov 5 2007Nov 9 2007

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


OtherSanta Fe Conference on Gamma-Ray Bursts 2007, GRB 2007
Country/TerritoryUnited States
CitySanta Fe, NM


  • bursts-methods
  • gamma rays
  • general
  • statistical-Gamma-rays

ASJC Scopus subject areas

  • General Physics and Astronomy


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