FRB microstructure revealed by the real-time detection of FRB170827
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Farah, W; Flynn, C.; Bailes, Matthew; Jameson, A; Bannister, Keith; Barr, E D; Bateman, T; Bhandari, S; Caleb, Manisha; Campbell-Wilson, D; Chang, Seo-Won; Deller, A; Green, Anne J; Hunstead, Richard; Moller, Anais; Onken, Christopher; Tucker, Bradley; Wolf, Christian
Description
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. FRB170827 was first detected with our low-latency (< 24 s) and 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 that have unveiled fine temporal and frequency...[Show more]
dc.contributor.author | Farah, W | |
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dc.contributor.author | Flynn, C. | |
dc.contributor.author | Bailes, Matthew | |
dc.contributor.author | Jameson, A | |
dc.contributor.author | Bannister, Keith | |
dc.contributor.author | Barr, E D | |
dc.contributor.author | Bateman, T | |
dc.contributor.author | Bhandari, S | |
dc.contributor.author | Caleb, Manisha | |
dc.contributor.author | Campbell-Wilson, D | |
dc.contributor.author | Chang, Seo-Won | |
dc.contributor.author | Deller, A | |
dc.contributor.author | Green, Anne J | |
dc.contributor.author | Hunstead, Richard | |
dc.contributor.author | Moller, Anais | |
dc.contributor.author | Onken, Christopher | |
dc.contributor.author | Tucker, Bradley | |
dc.contributor.author | Wolf, Christian | |
dc.date.accessioned | 2019-12-20T02:15:06Z | |
dc.date.available | 2019-12-20T02:15:06Z | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.uri | http://hdl.handle.net/1885/196423 | |
dc.description.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. FRB170827 was first detected with our low-latency (< 24 s) and 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 that have unveiled fine temporal and frequency structure. The dispersion measure (DM) of 176.80 ± 0.04 pc cm-3 is the lowest of the FRB population. The Milky Way contribution along the line of sight is ~40 pc cm-3, leaving an excess DM of ~145 pc cm-3. The FRB has a fluence > 20 ± 7 Jyms, and is narrow with a width of ~400 s at 10 per cent of its maximum amplitude. However, the burst shows three temporal components, the narrowest of which is ~30 s, and a scattering time-scale of 4.1 ± 2.7 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 and patchy emission across the entire band. We show that the fine spectral structure could arise in the FRB host galaxy, or its immediate vicinity. | |
dc.description.sponsorship | ATD is supported by an ARC Future Fellowship grant FT150100415. Parts of this work was performed on the gSTAR national facility at Swinburne University of Technology. SkyMapper is owned and operated by The Australian National University’s Research School of Astronomy and Astrophysics. The national facility capability for SkyMapper has been funded through the Australian Research Council LIEF grant LE130100104, awarded to the University of Sydney, the Australian National University, Swinburne University of Technology, the University of Queensland, the University of Western Australia, the University of Melbourne, Curtin University of Technology, Monash University, and the Australian Astronomical Observatory. MC acknowledges funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No 694745). | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_AU | |
dc.publisher | Oxford University Press | |
dc.rights | © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society | |
dc.source | Monthly Notices of the Royal Astronomical Society | |
dc.title | FRB microstructure revealed by the real-time detection of FRB170827 | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 478 | |
dc.date.issued | 2018 | |
local.identifier.absfor | 020106 - High Energy Astrophysics; Cosmic Rays | |
local.identifier.ariespublication | u4485658xPUB246 | |
local.publisher.url | https://academic.oup.com/ | |
local.type.status | Published Version | |
local.contributor.affiliation | Farah, W, Swinburne University of Technology | |
local.contributor.affiliation | Flynn, C., Swinburne University of Technology | |
local.contributor.affiliation | Bailes, Matthew, Swinburne University of Technology | |
local.contributor.affiliation | Jameson, A, Swinburne University | |
local.contributor.affiliation | Bannister, Keith, CSIRO Astronomy and Space Science | |
local.contributor.affiliation | Barr, E D, Max-Plank-Institute fur Radioastronomie | |
local.contributor.affiliation | Bateman, T, University of Sydney | |
local.contributor.affiliation | Bhandari, S, Swinburne University | |
local.contributor.affiliation | Caleb, Manisha, College of Science, ANU | |
local.contributor.affiliation | Campbell-Wilson, D, University of Sydney | |
local.contributor.affiliation | Chang, Seo-Won, College of Science, ANU | |
local.contributor.affiliation | Deller, A, Swinburne University of Technology | |
local.contributor.affiliation | Green, Anne J, University of Sydney | |
local.contributor.affiliation | Hunstead, Richard, University of Sydney | |
local.contributor.affiliation | Moller, Anais, College of Science, ANU | |
local.contributor.affiliation | Onken, Christopher , College of Science, ANU | |
local.contributor.affiliation | Tucker , Bradley, College of Science, ANU | |
local.contributor.affiliation | Wolf, Christian, College of Science, ANU | |
dc.relation | http://purl.org/au-research/grants/arc/FT150100415 | |
dc.relation | http://purl.org/au-research/grants/arc/LE130100104 | |
local.bibliographicCitation.issue | 1 | |
local.bibliographicCitation.startpage | 1209 | |
local.bibliographicCitation.lastpage | 1217 | |
local.identifier.doi | 10.1093/mnras/sty1122 | |
local.identifier.absseo | 970102 - Expanding Knowledge in the Physical Sciences | |
dc.date.updated | 2019-08-04T08:20:19Z | |
local.identifier.scopusID | 2-s2.0-85051495790 | |
dcterms.accessRights | Open Access | |
dc.provenance | http://sherpa.ac.uk/romeo/issn/0035-8711/..."author can archive publisher's version/PDF" from SHERPA/RoMEO site (as at 20/12/19). This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | |
Collections | ANU Research Publications |
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