article · Figshare
An ultra-bright fast radio burst was detected during a brief 3.4-day pilot survey using the Australian Square Kilometre Array Pathfinder. Operating in a wide-field fly's-eye configuration, the telescope utilised phased-array-feed technology to observe an instantaneous area of 160 square degrees, ultimately accumulating an exposure of 13,200 square degree hours. The detected event, designated FRB 170107, was mapped to a constrained sky region with a measured fluence of 58 plus or minus 6 Jansky milliseconds. Its radio spectrum exhibited a sharp cutoff above 1400 megahertz, an effect that could stem from scintillation or represent an intrinsic property of the burst itself. This detection provides direct evidence confirming that an ultra-bright population of fast radio bursts exists in the cosmos.
Fast radio bursts are intense, brief flashes of radio emission from deep space whose origins remain largely mysterious. Detecting an exceptionally bright event demonstrates the effectiveness of wide-field phased-array-feed survey methods in radio astronomy. Confirming that ultra-bright bursts exist provides astrophysicists with vital parameters to test physical models regarding how these extreme energetic phenomena are generated across the universe.
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We report the detection of an ultra-bright fast radio burst (FRB) from a modest, 3.4-day pilot survey with the Australian Square Kilometre Array Pathfinder. The survey was conducted in a wide-field fly's-eye configuration using the phased-array-feed technology deployed on the array to instantaneously observe an effective area of 160 deg2, and achieve an exposure totaling 13200 deg2 hr . We constrain the position of FRB 170107 to a region in size (90% containment) and its fluence to be 58 ±6 Jy ms. The spectrum of the burst shows a sharp cutoff above 1400 MHz, which could be due to either scintillation or an intrinsic feature of the burst. This confirms the existence of an ultra-bright (∼ Jy ms) population of FRBs.
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DOI: 10.25916/sut.26230226.v1
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