A Crazy Question: Can Apparently Brighter Gamma-ray Bursts Be Farther Away?

A. Mészáros, J. Řípa, F. Ryde


The cosmological relationships between observed and emitted quantities are determined for gamma-ray bursts (GRBs). The relationship shows that apparently fainter bursts need not, in general, lie at larger redshifts.This is possible when the luminosities (or emitted energies) in a sample of bursts increase faster than the dimming of the observed values with redshift. Four different samples of long bursts suggest that this is what really happens.


cosmology-miscellaneous; gamma-ray bursts.

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ISSN 1210-2709 (Print)
ISSN 1805-2363 (Online)
Published by the Czech Technical University in Prague