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Shannon, R M; Macquart, J-P; Bannister, K W; Ekers, R D; James, C W; Osłowski, S; Qiu, H; Sammons, M; Hotan, A W; Voronkov, M A; Beresford, R J; Brothers, M; Brown, A J; Bunton, J D; Chippendale, A P; Haskins, C; Leach, M; Marquarding, M; McConnell, D; Pilawa, M A; Sadler, E M; Troup, E R; Tuthill, J; Whiting, M T; Allison, J R; Anderson, C S; Bell, M E; Collier, J D; Gürkan, G; Heald, G; Riseley, C J
Nature, 10/2018, Letnik: 562, Številka: 7727Journal Article
Despite considerable efforts over the past decade, only 34 fast radio bursts-intense bursts of radio emission from beyond our Galaxy-have been reported . 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 , and its subsequent localization 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 .
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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