We compare the luminosity function and rate inferred from the BATSE Short Hard Bursts (SHBs) peak flux distribution with the redshift and luminosity distributions of SHBs observed by Swi/i/HETE-2. The Swift/H.ETE-2 SHB sample is incompatible with a SHB population that follows the star formation rate. However, it is compatible with a distribution of delay times after the SFR. This would be the case if SHBs are associated with the mergers of Double Neutron Star (DNS) systems. DNS may be "primordial" or can form dynamically by binary exchange interaction in globular clusters during core collapse. The implied SHB rates that we find range from ~ 8 to ~ 30/170 Gpc~3y~1. This rate is much higher than what was previously estimated and, when beaming is taken into account, it is comparable to the rate of neutron star mergers estimated from statistics of binary pulsars. If short GRBs are produced in mergers the implied rate practically guarantees detection by LIGO II and possibly even by LIGO I.
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机译：我们将BATSE短硬爆裂（SHBs）峰值通量分布与Swi / i / HETE-2观测到的SHBs的红移和发光度分布相比较，得出了光度函数和速率。 Swift / H.ETE-2 SHB样本与遵循恒星形成速率的SHB种群不兼容。但是，它与SFR之后的延迟时间分布兼容。如果SHB与Double Neutron Star（DNS）系统的合并相关联，就是这种情况。 DNS可能是“原始的”，也可能是在核心崩溃期间通过球状群集中的二进制交换交互来动态形成的。我们发现隐含的SHB速率从〜8到〜30/170 Gpc〜3y〜1。这个速率比以前估计的要高得多，并且考虑到波束，它可以与根据双星脉冲星的统计估计的中子星合并的速率相媲美。如果合并中产生了简短的GRB，则隐含利率实际上可以确保由LIGO II甚至可能由LIGO I进行检测。
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