Parkes observations for project P958 semester 2018OCTS_26

A major breakthrough in fast radio burst (FRB) astronomy was recently made when the repeating FRB 121102 was localized to sub-arcsecond precision. The bursts were found to originate in a bright radio nebula (hypothesized to be a young supernova remnant or pulsar wind nebulae) in a distant dwarf galaxy. These dwarf galaxies are also preferential hosts to superluminous supernova and long gamma-ray bursts, and it has been therefore suggested that the source of the repeating FRB could be a young highly magnetised neutron star. While an understanding of the repeating FRB is emerging, it is still unclear what relationship it has to the rest of the population. Over the last year searches with the Australian Square Kilometre Array Pathfinder (ASKAP) have detected 26 bursts, and over the next six month will likely detect another 12 FRBs, which will be localized to a few arcseconds. Here we propose to search this population for repeats. Our comprehensive sample and a dense monitoring campaign of well localised bursts, at a fluence limit more than 60 times lower than that of their detections, will either confirm the presence of additional repeating FRBs or the uniqueness of FRB 121102 amongst the population.

快速射电暴（fast radio burst, FRB）天文学领域近日取得重大突破：重复暴FRB 121102被精准定位至亚角秒级范围内。该暴源位于一个遥远矮星系内的明亮射电星云中，该星云被推测为年轻超新星遗迹或脉冲星风云。此类矮星系同时也是超亮超新星与长伽马射线暴的优选宿主星系，因此有学者提出，该重复暴的源可能为一颗年轻的强磁化中子星。尽管学界对重复暴的认知正逐步深化，但目前仍不清楚其与该暴群其余成员之间的关联。
过去一年间，依托澳大利亚平方千米阵探路者（Australian Square Kilometre Array Pathfinder, ASKAP）开展的巡天观测已探测到26次射电暴；未来六个月内，该项目还将有望探测到另外12次FRB，其定位精度将达到数角秒级别。
本研究拟针对该暴群开展重复暴搜寻工作。
我们将采用覆盖全面的观测样本，并对定位精度优良的射电暴开展高密度监测计划。本次监测的能流极限较此前探测阈值低60倍以上，该研究将要么证实额外重复暴的存在，要么证明FRB 121102在该暴群中具有独特性。