Can We Trust GRB High Energy Correlations?


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-E$_γ$ (``Ghirlanda’') correlation is effectively independent of the GRB redshifts z, which suggests it contains little intrinsic physics.

American Institute of Physics Conference Series