A Deep Targeted Search for Fast Radio Bursts from the Sites of Low-redshift Short Gamma-Ray Bursts
A Deep Targeted Search for Fast Radio Bursts from the Sites of Low-redshift Short Gamma-Ray Bursts
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DOI：
10.3847/1538-4357/ab58c3
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发表时间：
2019-09
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通讯作者：
D. Madison;D. Agarwal;K. Aggarwal;O. Young;H. Cromartie;M. Lam;M. Lam;S. Chatterjee;S. Chatterjee;J. Cordes;J. Cordes;N. Garver-Daniels;D. Lorimer;R. Lynch;M. Mclaughlin;S. Ransom;R. Wharton
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作者：
D. Madison;D. Agarwal;K. Aggarwal;O. Young;H. Cromartie;M. Lam;M. Lam;S. Chatterjee;S. Chatterjee;J. Cordes;J. Cordes;N. Garver-Daniels;D. Lorimer;R. Lynch;M. Mclaughlin;S. Ransom;R. Wharton
一些短伽玛射线暴（SGRB）被认为是由中子星合并引起的，有时可能会产生大质量的中子星星残骸，能够产生河外快射电暴（FRB）。我们从六个低红移SGRB的位置进行了深入的搜索FRB。我们收集了高的时间和频率分辨率的数据，从每个网站的10小时使用2 GHz接收器的绿色银行望远镜（GBT）。两个SGRB网站，我们的目标是可见的阿雷西博射电望远镜，我们进行了额外的10小时的1.4 GHz的观测。我们使用GPU优化的去色散算法heimdall和基于机器学习的软件包Fast Extragalactic Transient Candidate Hunter搜索FRB数据。我们没有发现任何FRB，但会检测到任何峰值通量密度超过87 mJy的GBT或21 mJy的Arecibo，信噪比至少为10。在我们的观测过程中，从这些地点发射的任何FRB的各向同性等效能量都不会超过1038 erg的几倍，与第一个已知的重复FRB 121102的一些最低能量爆发相当。
Some short gamma-ray bursts (SGRBs) are thought to be caused by the mergers of binary neutron stars which may sometimes produce massive neutron star remnants capable of producing extragalactic fast radio bursts (FRBs). We conducted a deep search for FRBs from the sites of six low-redshift SGRBs. We collected high time- and frequency-resolution data from each of the sites for 10 hr using the 2 GHz receiver of the Green Bank Telescope (GBT). Two of the SGRB sites we targeted were visible with the Arecibo Radio Telescope with which we conducted an additional 10 hr of 1.4 GHz observations for each. We searched our data for FRBs using the GPU-optimized dedispersion algorithm heimdall and the machine-learning-based package Fast Extragalactic Transient Candidate Hunter. We did not discover any FRBs, but would have detected any with peak flux densities in excess of 87 mJy at the GBT or 21 mJy at Arecibo with a signal-to-noise ratio of at least 10. The isotropic-equivalent energy of any FRBs emitted from these sites in our bands during our observations must not have exceeded a few times 1038 erg, comparable to some of the lowest energy bursts yet seen from the first known repeating FRB 121102.