Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1000...16b&link_type=abstract
GAMMA-RAY BURSTS 2007: Proceedings of the Santa Fe Conference. AIP Conference Proceedings, Volume 1000, pp. 16-19 (2008).
Physics
Gamma-Ray Sources, Gamma-Ray Bursts, Origin And Formation Of The Universe, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Gamma Transitions And Level Energies
Scientific paper
We show that several GRB correlations have common features indicative of an origin in selection effects. We focus on the possible origin of the Epk-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-Eγ (``Ghirlanda'') correlation is effectively independent of the GRB redshifts z, which suggests it contains little intrinsic physics.
Bloom Joshua S.
Butler Nathaniel R.
Kocevski Daniel
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