http://arxiv.org/abs/1706.05639
Progenitors of short gamma-ray bursts are thought to be neutron stars coalescing with their companion black hole or neutron star. These compact binary coalescing systems are one of main targets of ground-based gravitational wave observations. To reveal the nature of short gamma-ray bursts, we devise a Bayesian framework for combining astrophysical and gravitational wave information that allows us to probe short gamma-ray burst luminosities. We show that combined short gamma-ray burst and gravitational wave observations not only improve progenitor distance and inclination angle estimates, they also allow the isotropic luminosities pf short gamma-ray bursts to be determined without the need for host galaxy or light curve information. We characterise our approach by simulating 1000 joint short gamma-ray burst and gravitational wave detections by Advanced LIGO and Advanced Virgo. We compare isotropic luminosities obtained via our analysis with the ideal scenario where the distance to the short gamma-ray burst is known exactly. We show that ${\sim}90\%$ of the simulations have uncertainties on short gamma-ray burst isotropic luminosity estimates that are within a factor of 2 of the ideal scenario. Therefore, isotropic luminosities can be confidently determined for joint short gamma-ray burst and gravitational wave observations with Advanced LIGO and Advanced Virgo. Planned enhancements to Advanced LIGO will extend its range and likely produce several joint detections of short gamma-ray bursts and gravitational waves. Additionally, third-generation gravitational wave detectors will allow for isotrpic luminosity estimates for the majority of the short gamma-ray burst population within a redshift of $z{\sim}1$.
X. Fan, C. Messenger and I. Heng
Tue, 20 Jun 17
45/72
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