Despite considerable efforts over the past decade, only 34 fast radio bursts—intense bursts of radio emission from beyond our Galaxy—have been reported1,2. Attempts to understand the population as a whole have been hindered by the highly heterogeneous nature of the searches, which have been conducted with telescopes of different sensitivities, at a range of radio frequencies, and in environments corrupted by different levels of radio-frequency interference from human activity. Searches have been further complicated by uncertain burst positions and brightnesses—a consequence of the transient nature of the sources and the poor angular resolution of the detecting instruments. The discovery of repeating bursts from one source3, and its subsequent localization4 to a dwarf galaxy at a distance of 3.7 billion light years, confirmed that the population of fast radio bursts is located at cosmological distances. However, the nature of the emission remains elusive. Here we report a well controlled, wide-field radio survey for these bursts. We found 20, none of which repeated during follow-up observations between 185–1,097 hours after the initial detections. The sample includes both the nearest and the most energetic bursts detected so far. The survey demonstrates that there is a relationship between burst dispersion and brightness and that the high-fluence bursts are the nearby analogues of the more distant events found in higher-sensitivity, narrower-field surveys5.A large-scale survey of fast radio bursts—short pulses of radio waves that seem to come from cosmological distances—finds 20 such events, including both the nearest and the most energetic bursts observed so far.

中文翻译：

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来自广域调查的快速射电暴的色散-亮度关系

尽管在过去十年中做出了相当大的努力，但只有 34 次快速射电爆发——来自我们银河系以外的强烈射电爆发——被报道1,2。研究的高度异质性阻碍了了解整个人口的尝试，这些搜索是用不同灵敏度的望远镜、在一系列无线电频率下进行的，并且是在被来自不同水平的无线电频率干扰破坏的环境中进行的。人类活动。不确定的爆发位置和亮度使搜索变得更加复杂——这是源的瞬态性质和检测仪器较差的角分辨率的结果。发现来自一个源 3 的重复爆发，以及随后将其定位 4 到一个距离 37 亿光年的矮星系，证实快速射电暴的群体位于宇宙距离。然而，排放的性质仍然难以捉摸。在这里，我们报告了对这些爆发的控制良好的宽场无线电调查。我们发现了 20 个，在初始检测后 185-1,097 小时的后续观察中没有一个重复。该样本包括迄今为止检测到的最近和最活跃的爆发。调查表明爆发扩散和亮度之间存在关系，并且高通量爆发是在更高灵敏度、更窄视场调查中发现的更远事件的附近类似物5.快速射电爆发的大规模调查——似乎来自宇宙距离的无线电波短脉冲——发现了 20 个这样的事件，