FRB microstructure revealed by the real-time detection of FRB170827

W. Farah^*, C. Flynn, M. Bailes, A. Jameson, K. W. Bannister, E. D. Barr, T. Bateman, S. Bhandari, M. Caleb, D. Campbell-Wilson, S. W. Chang, A. Deller, A. J. Green, R. Hunstead, F. Jankowski, E. Keane, J. P. Macquart, A. Möller, C. A. Onken, S. OslowskiA. Parthasarathy, K. Plant, V. Ravi, R. M. Shannon, B. E. Tucker, V. Venkatraman Krishnan, C. Wolf

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

109 Citations (Scopus)

Original language	English
Pages (from-to)	1209-1217
Number of pages	9
Journal	Monthly Notices of the Royal Astronomical Society
Volume	478
Issue number	1
DOIs	https://doi.org/10.1093/mnras/sty1122
Publication status	Published - 21 Jul 2018

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10.1093/mnras/sty1122

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Farah, W., Flynn, C., Bailes, M., Jameson, A., Bannister, K. W., Barr, E. D., Bateman, T., Bhandari, S., Caleb, M., Campbell-Wilson, D., Chang, S. W., Deller, A., Green, A. J., Hunstead, R., Jankowski, F., Keane, E., Macquart, J. P., Möller, A., Onken, C. A., ... Wolf, C. (2018). FRB microstructure revealed by the real-time detection of FRB170827. Monthly Notices of the Royal Astronomical Society, 478(1), 1209-1217. https://doi.org/10.1093/mnras/sty1122

@article{15524f43ad284616a8f6bdc0e208299e,

title = "FRB microstructure revealed by the real-time detection of FRB170827",

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.",

keywords = "Instrumentation: interferometers, Methods: data analysis, Radio continuum: transients",

author = "W. Farah and C. Flynn and M. Bailes and A. Jameson and Bannister, {K. W.} and Barr, {E. D.} and T. Bateman and S. Bhandari and M. Caleb and D. Campbell-Wilson and Chang, {S. W.} and A. Deller and Green, {A. J.} and R. Hunstead and F. Jankowski and E. Keane and Macquart, {J. P.} and A. M{\"o}ller and Onken, {C. A.} and S. Oslowski and A. Parthasarathy and K. Plant and V. Ravi and Shannon, {R. M.} and Tucker, {B. E.} and Krishnan, {V. Venkatraman} and C. Wolf",

note = "Publisher Copyright: {\textcopyright} 2018 The Author(s).",

year = "2018",

month = jul,

day = "21",

doi = "10.1093/mnras/sty1122",

language = "English",

volume = "478",

pages = "1209--1217",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "1",

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Farah, W, Flynn, C, Bailes, M, Jameson, A, Bannister, KW, Barr, ED, Bateman, T, Bhandari, S, Caleb, M, Campbell-Wilson, D, Chang, SW, Deller, A, Green, AJ, Hunstead, R, Jankowski, F, Keane, E, Macquart, JP, Möller, A, Onken, CA, Oslowski, S, Parthasarathy, A, Plant, K, Ravi, V, Shannon, RM, Tucker, BE, Krishnan, VV & Wolf, C 2018, 'FRB microstructure revealed by the real-time detection of FRB170827', Monthly Notices of the Royal Astronomical Society, vol. 478, no. 1, pp. 1209-1217. https://doi.org/10.1093/mnras/sty1122

TY - JOUR

T1 - FRB microstructure revealed by the real-time detection of FRB170827

AU - Farah, W.

AU - Flynn, C.

AU - Bailes, M.

AU - Jameson, A.

AU - Bannister, K. W.

AU - Barr, E. D.

AU - Bateman, T.

AU - Bhandari, S.

AU - Caleb, M.

AU - Campbell-Wilson, D.

AU - Chang, S. W.

AU - Deller, A.

AU - Green, A. J.

AU - Hunstead, R.

AU - Jankowski, F.

AU - Keane, E.

AU - Macquart, J. P.

AU - Möller, A.

AU - Onken, C. A.

AU - Oslowski, S.

AU - Parthasarathy, A.

AU - Plant, K.

AU - Ravi, V.

AU - Shannon, R. M.

AU - Tucker, B. E.

AU - Krishnan, V. Venkatraman

AU - Wolf, C.

PY - 2018/7/21

Y1 - 2018/7/21

N2 - 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.

AB - 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.

KW - Instrumentation: interferometers

KW - Methods: data analysis

KW - Radio continuum: transients

UR - http://www.scopus.com/inward/record.url?scp=85051495790&partnerID=8YFLogxK

U2 - 10.1093/mnras/sty1122

DO - 10.1093/mnras/sty1122

M3 - Article

SN - 0035-8711

VL - 478

SP - 1209

EP - 1217

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -

FRB microstructure revealed by the real-time detection of FRB170827

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