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arXiv 1409.8149astro-ph.HEgr-qc
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联合观测引力波和短伽马射线暴的前景

Prospects for joint gravitational wave and short gamma-ray burst observations

J. Clark, H. Evans, S. Fairhurst, I. W. Harry, E. Macdonald, D. Macleod, P. J. Sutton, A. R. Williamson

摘要:

我们提出了一个详细的评估联合引力波和短伽马射线暴(GRB)的观测在未来几年的预期率。我们首先评估的距离灵敏度的引力波搜索,所产生的使用伽玛射线暴观测限制的时间和天空的位置的源的改进。我们认为,这给了25%的灵敏度增加相比,全天,所有的时间搜索,相应的可检测的引力波信号的数量增加了一倍以上与伽玛射线暴。利用这一点,我们提出了与先进的LIGO和Virgo仪器联合观测的预期速率,同时考虑到引力波探测器网络的预期演变。我们表明,在早期的高级引力波探测器观测运行中,从2015年到2017年,只有很小的机会进行联合观测。然而,随着探测器接近其设计灵敏度,如果费米和行星际网络等广域伽马射线暴卫星继续运行,就有很好的机会进行联合观测。这个速率也将严重依赖于祖先的性质,中子星-黑洞系统比双中子星系统可观测到更远的距离。双星合并和暴的相对速率取决于暴的喷流张开角。因此,联合观测,以及准确测量的伽玛暴率和二进制合并率,将允许一个改进的估计伽玛暴的张开角。

英文摘要:

We present a detailed evaluation of the expected rate of joint gravitational-wave and short gamma-ray burst (GRB) observations over the coming years. We begin by evaluating the improvement in distance sensitivity of the gravitational wave search that arises from using the GRB observation to restrict the time and sky location of the source. We argue that this gives a 25% increase in sensitivity when compared to an all-sky, all-time search, corresponding to more than doubling the number of detectable gravitational wave signals associated with GRBs. Using this, we present the expected rate of joint observations with the advanced LIGO and Virgo instruments, taking into account the expected evolution of the gravitational wave detector network. We show that in the early advanced gravitational wave detector observing runs, from 2015-2017, there is only a small chance of a joint observation. However, as the detectors approach their design sensitivities, there is a good chance of joint observations provided wide field GRB satellites, such as Fermi and the Interplanetary Network, continue operation. The rate will also depend critically upon the nature of the progenitor, with neutron star--black hole systems observable to greater distances than double neutron star systems. The relative rate of binary mergers and GRBs will depend upon the jet opening angle of GRBs. Consequently, joint observations, as well as accurate measurement of both the GRB rate and binary merger rates, will allow for an improved estimation of the opening angle of GRBs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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