期刊
NATURE
卷 562, 期 7727, 页码 386-390出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41586-018-0588-y
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资金
- Australian Research Council (ARC) [FL150100148]
- ARC [CE170100004, DP18010085]
- Commonwealth Scientific and Industrial Research Organisation (CSIRO) Office of the Chief Executive (OCE)
- ARC Centre of Excellence for All-Sky Astrophysics (CAASTRO) [CE110001020]
- Australian Government
- National Collaborative Research Infrastructure Strategy
- Government of Western Australia
- Science and Industry Endowment Fund
- NASA
Despite considerable efforts over the past decade, only 34 fast radio bursts-intense bursts of radio emission from beyond our Galaxy-have been reported(1,2). 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 source(3), and its subsequent localization(4) 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 surveys(5).
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