Cosmological Time Dilation in Gamma Ray Bursts?

Details Cosmological Time Dilation in Gamma Ray Bursts? Cosmological Time Dilation in Gamma Ray Bursts?

1994-07-01

arxiv.org/abs/astro-ph/9407007v1

Astronomy and Astrophysics

Astrophysics

11 pages, AASTeX, figures upon request from dlbbat@cass09.ucsd.edu

Scientific paper

10.1086/187502

Norris et al. (1994) report that the temporal structure of faint gamma ray bursts is longer than that of bright bursts, as expected for time dilation in the cosmological models of burst origin. I show that the observed trends can easily be produced by a burst luminosity function and thus may not result from cosmological effects. A cosmological signature may be present, but the tests Norris et al. present are not powerful enough to detect these signatures.

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