Parkes observations for project P958 semester 2019APRS_32

Fast radio bursts (FRBs) continue to raise more questions than they answer. Until a few months ago, only one burst – the only one known to repeat - had been localized to a bright radio nebula (either a young supernova remnant or pulsar wind nebulae) in a distant dwarf galaxy.
Over the last year searches with the Australian Square Kilometre Array Pathfinder (ASKAP) have detected 28 bursts, two of which have been localised to host galaxies at redshifts > 0.3. These bursts and their hosts are very unlike the repeater, suggesting there may be a dichotomy in the population. Over the next six months we expect to detect another 12 FRBs, which will also have sub-arcsecond localisations. 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 Bursts, FRBs）始终是问题多于答案。直到数月前，仅发现一个暴——已知唯一的重复暴——被定位到遥远矮星系中的明亮射电星云（可能是年轻超新星遗迹或脉冲星风云）。

过去一年中，利用澳大利亚平方千米阵探路者（Australian Square Kilometre Array Pathfinder, ASKAP）开展的搜索已探测到28个暴，其中两个被定位到红移大于0.3的宿主星系。这些暴及其宿主星系与重复暴存在显著差异，表明该种群可能存在二分性。未来六个月内，我们预计将再探测到12个FRB，它们也将具备亚角秒级的定位精度。在此，我们提议对该种群开展重复暴搜索。我们的综合样本以及针对定位明确暴的密集监测计划——其流量密度下限比探测时低60余倍——将要么证实存在更多重复FRB，要么确认FRB 121102在该种群中的独特性。