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- W2789388218 abstract "We report a new Fast Radio Burst (FRB) discovered in real-time as part of the UTMOST project at the Molonglo Observatory Synthesis Radio Telescope (MOST). FRB170827 is the first detected with our low-latency ($< 24$ s), machine-learning-based FRB detection system. The FRB discovery was accompanied by the capture of voltage data at the native time and frequency resolution of the observing system, enabling coherent dedispersion and detailed off-line analysis, which have unveiled fine temporal and frequency structure. The dispersion measure (DM) of 176.80 $pm$ 0.04 pc cm$^{-3}$, is the lowest of the FRB population. The Milky Way contribution along the line of sight is $sim$ 40 pc cm$^{-3}$, leaving an excess DM of $sim$ 145 pc cm$^{-3}$. The FRB has a fluence $>$ 20 $pm$ 7 Jy ms, and is narrow, with a width of $sim$ 400 $mu$s at 10$%$ of its maximum amplitude. However, the burst shows three temporal components, the narrowest of which is $sim$ 30 $mu$s, and a scattering timescale of $4.1 pm 2.7$ $mu$s. The FRB shows spectral modulations on frequency scales of 1.5 MHz and 0.1 MHz. Both are prominent in the dynamic spectrum, which shows a very bright region of emission between 841 and 843 MHz, and weaker, patchy emission across the entire band. We show the fine spectral structure could arise in the FRB host galaxy, or its immediate vicinity." @default.
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- W2789388218 date "2018-05-03" @default.
- W2789388218 modified "2023-10-18" @default.
- W2789388218 title "FRB microstructure revealed by the real-time detection of FRB170827" @default.
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- W2789388218 doi "https://doi.org/10.1093/mnras/sty1122" @default.
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