SIMBAD references

2003ApJ...593L..15V - Astrophys. J., 593, L15-L18 (2003/August-2)

Observational evidence for a correlation between peak luminosities and beaming in gamma-ray bursts.

VAN PUTTEN M.H.P.M. and REGIMBAU T.

Abstract (from CDS):

We calculate the unseen-but-true gamma-ray burst (GRB) event rate from a current flux-limited sample of 33 GRBs with individually measured redshifts. We consider a GRB event rate that is proportional to the star formation rate, in view of the GRB-supernovae association in SN 1998bw and GRB 030329. By fitting a lognormal distribution of GRB peak luminosities, we find a ratio 1/fr≃450 for the true-to-observed GRB event rates. This provides an independent derivation of the GRB beaming factor 1/fb≃500 obtained by Frail et al. from sources with standard GRB energies. We discuss applications to GRB 980425.

Abstract Copyright: ∼

Journal keyword(s): Gamma Rays: Bursts

CDS comments: Table 1 : the redshift given for GB 000301C is that of GB 000214 and vice versa.

Simbad objects: 33

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