An observational upper limit on the rate of gamma-ray bursts with neutron star-black hole merger progenitors
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astro-ph.HE
gr-qc
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burstsgamma-rayprogenitorsholemathrmneutronnsbhbeen
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Compact-object binary mergers consisting of one neutron star and one black hole (NSBHs) have long been considered promising progenitors for gamma-ray bursts, whose central engine remains poorly understood. Using gravitational-wave constraints on the population-level NSBH mass and spin distributions we find that at most $20~\mathrm{Gpc}^{-3}\mathrm{yr}^{-1}$ of gamma-ray bursts in the local universe can have NSBH progenitors.
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