GRB formation rate derived by the E p -luminosity relation

Details GRB formation rate derived by the E p -luminosity relation GRB formation rate derived by the E p -luminosity relation

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ncimc..28..701y&link_type=abstract

Il Nuovo Cimento C, vol. 28, Issue 4, p.701

Physics

Scientific paper

We estimate a GRB formation rate based on the new relation between the spectral peak energy (Ep) and the peak luminosity. This relation is derived combining the data of Ep and the peak luminosities by BeppoSAX and BATSE, and it looks considerably tighter and more reliable than the relations suggested by the previous works. Using the new Ep-luminosity relation, we estimate redshifts of the 689 GRBs without known distances in the BATSE catalog and derive a GRB formation rate as a function of the redshift. For the redshift range of 0≤z≤2, the GRB formation rate increases and is well correlated with the star formation rate while it keeps constant toward z ˜ 12.

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