http://arxiv.org/abs/1710.05620
I model the luminosity function of short Gamma Ray Bursts (GRBs) from all short GRBs detected till May, 2017 by estimating the luminosities via the `pseduo-redshifts’ obtained from the Yonetoku correlation, and assuming a standard delay between the cosmic star formation rate and the production rate of their progenitors. While the simple powerlaw and an exponential cutoff powerlaw model are ruled out, the data is fit well by a broken powerlaw model with an evolving break luminosity. Using the derived parameters of this model along with conservative values in the jet opening angles seen from afterglow observations, I derive the true rate of short GRBs. If a short GRB is produced from each binary neutron star merger, a strong lower bound of $\sim 1$ per decade can be placed on their observation rate by the aLIGO/VIRGO gravitational wave detectors.
D. Paul
Tue, 17 Oct 17
23/163
Comments: Submitted to MNRAS, comments are welcome; 7 pages, 5 figures, 3 tables