Rest frame light curves of Swift GRBs

Mangano, V
La Parola, V
Troja, E
Cusumano, G
Mineo, T
Burrows, D
Campana, S
Capalbi, M
Chincarini, G
Gehrels, N
Giommi, P
Moretti, A
Perri, M
Romano, P

Publication date

January 2007

Abstract

We have computed the luminosity rest frame light curves of the first 40 Gamma-ray bursts (GRBs) detected by Swift with well established redshift. We studied average properties of the light curves in the four subsamples of bursts given by z=4. We conclude that all the last three subsamples share the same morphology and the same luminosity range. Very high redshift (z>=4) GRBs detected up to now are not intrinsically longer than lower redshift long GRBs. Nearby long GRBs (z<1) are fainter than average. Possible selection effect are under investigation