The joint detection of GW170817/GRB 170817 confirmed the long-standing theory that binary neutron star mergers produce short gamma-ray burst (sGRB) jets that can successfully break out of the surrounding ejecta. At the same time, the association with a kilonova provided unprecedented information regarding the physical properties (such as masses and velocities) of the different ejecta constituents. Combining this knowledge with the observed luminosities and durations of cosmological sGRBs detected by the Burst Alert Telescope onboard the Neil Gehrels Swift Observatory, we revisit the breakout conditions of sGRB jets. Assuming self-collimation of sGRB jets does not play a critical role, we find that the time interval between the binary merger and the launch of a typical sGRB jet is ##IMG## [http://ej.iop.org/images/2041-8205/895/2/L33/apjlab9223ieqn1.gif] {$\lesssim 0.1\,{\rm{s}}$} . We also show that for a fraction of at least ##IMG## {$\sim 3...}

中文翻译：

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准备，设置，发射：双中子星合并和短伽玛射线爆射流形成之间的时间间隔

GW170817 / GRB 170817的联合检测证实了长期存在的理论，即双星中子星合并产生的短伽马射线爆发（sGRB）射流可以成功地脱离周围的喷出物。同时，与千变万化的联系提供了有关不同喷射成分的物理性质（例如质量和速度）的空前信息。将这些知识与Neil Gehrels Swift天文台上的爆炸警报望远镜观测到的宇宙性sGRB的亮度和持续时间相结合，我们将重新审视sGRB射流的爆发条件。假设sGRB喷气机的自准直性不发挥关键作用，我们发现二进制合并与典型sGRB喷气机发射之间的时间间隔为## IMG ## [http：//ej.iop。org / images / 2041-8205 / 895/2 / L33 / apjlab9223ieqn1.gif] {$ \ lesssim 0.1 \，{\ rm {s}} $}。我们还显示出至少## IMG ## {$ \ sim 3 ...}