A crazy question: Can be the apparently brighter gamma-ray bursts at larger distances?

Presentation duration: 15 minutes

Presenter: Attila Meszaros

The natural assumption is that fainter objects should, on average, lie at larger redshifts. Redshifts larger than 5 are rare for bursts with measured redshifts. On the other hand, faint bursts with non-detected redshifts are in majority. Hence, it seems that the majority of bursts should be at redshifts larger than 5. It is shown that this need not be the case, because the apparently fainter bursts need not, in general, lie at large redshifts. The presentation is a recapitulation of the article arXiv:1101.5040

Jakub Ripa,
Felix Ryde