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A polarized fast radio burst at low Galactic latitude

A polarized fast radio burst at low Galactic latitude
A polarized fast radio burst at low Galactic latitude
We report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 ± 0.8 pc cm-3, a pulse duration of 2.8^{+1.2}_{-0.5} ms, and a measured peak flux density assuming that the burst was at beam centre of 0.7^{+0.2}_{-0.1} Jy. The FRB originated at a Galactic longitude and latitude of 24.66°, 5.28° and 25° away from the Galactic Center. The burst was found to be 43 ± 5 per cent linearly polarized with a rotation measure (RM) in the range -9 <RM <12 rad m-2 (95 per cent confidence level), consistent with zero. The burst was followed up with 11 telescopes to search for radio, optical, X-ray, γ-ray and neutrino emission. Neither transient nor variable emission was found to be associated with the burst and no repeat pulses have been observed in 17.25 h of observing. The sightline to the burst is close to the Galactic plane and the observed physical properties of FRB 150215 demonstrate the existence of sight lines of anomalously low RM for a given electron column density. The Galactic RM foreground may approach a null value due to magnetic field reversals along the line of sight, a decreased total electron column density from the Milky Way, or some combination of these effects. A lower Galactic DM contribution might explain why this burst was detectable whereas previous searches at low latitude have had lower detection rates than those out of the plane.
polarization, methods: data analysis, surveys, ISM: structure
0035-8711
4465-4482
Petroff, E.
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Burke-Spolaor, S.
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Keane, E. F.
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McLaughlin, M. A.
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Miller, R.
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Andreoni, I.
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Bailes, M.
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Barr, E. D.
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Bernard, S. R.
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Bhandari, S.
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Bhat, N. D. R.
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Burgay, M.
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Caleb, M.
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Champion, D.
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Chandra, P.
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Cooke, J.
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Dhillon, V. S.
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Farnes, J. S.
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Hardy, L. K.
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Jaroenjittichai, P.
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Johnston, S.
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Kasliwal, M.
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Kramer, M.
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Littlefair, S. P.
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Macquart, J. P.
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Mickaliger, M.
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Possenti, A.
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Pritchard, T.
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Ravi, V.
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Rest, A.
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Rowlinson, A.
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Sawangwit, U.
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Stappers, B.
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Sullivan, M.
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Tiburzi, C.
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van Straten, W.
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Albert, A.
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André, M.
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Anghinolfi, M.
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Anton, G.
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Ardid, M.
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Aubert, J.-J.
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Avgitas, T.
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Baret, B.
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Barrios-Martí, J.
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Basa, S.
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Bertin, V.
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Biagi, S.
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Bormuth, R.
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Bourret, S.
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ANTARES Collaboration
H.E.S.S. Collaboration
Petroff, E.
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Burke-Spolaor, S.
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Keane, E. F.
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McLaughlin, M. A.
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Miller, R.
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Andreoni, I.
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Bailes, M.
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Barr, E. D.
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Bernard, S. R.
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Bhandari, S.
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Bhat, N. D. R.
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Burgay, M.
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Caleb, M.
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Champion, D.
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Chandra, P.
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Cooke, J.
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Dhillon, V. S.
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Farnes, J. S.
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Hardy, L. K.
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Jaroenjittichai, P.
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Johnston, S.
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Kasliwal, M.
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Kramer, M.
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Littlefair, S. P.
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Macquart, J. P.
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Mickaliger, M.
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Possenti, A.
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Pritchard, T.
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Ravi, V.
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Rest, A.
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Rowlinson, A.
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Sawangwit, U.
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Stappers, B.
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Sullivan, M.
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Tiburzi, C.
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van Straten, W.
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Albert, A.
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André, M.
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Anghinolfi, M.
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Anton, G.
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Ardid, M.
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Aubert, J.-J.
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Avgitas, T.
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Baret, B.
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Barrios-Martí, J.
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Basa, S.
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Bertin, V.
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Biagi, S.
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Bormuth, R.
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Bourret, S.
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Petroff, E., Burke-Spolaor, S., Keane, E. F., McLaughlin, M. A., Miller, R., Andreoni, I., Bailes, M., Barr, E. D., Bernard, S. R., Bhandari, S., Bhat, N. D. R., Burgay, M., Caleb, M., Champion, D., Chandra, P., Cooke, J., Dhillon, V. S., Farnes, J. S., Hardy, L. K., Jaroenjittichai, P., Johnston, S., Kasliwal, M., Kramer, M., Littlefair, S. P., Macquart, J. P., Mickaliger, M., Possenti, A., Pritchard, T., Ravi, V., Rest, A., Rowlinson, A., Sawangwit, U., Stappers, B., Sullivan, M., Tiburzi, C., van Straten, W., Albert, A., André, M., Anghinolfi, M., Anton, G., Ardid, M., Aubert, J.-J., Avgitas, T., Baret, B., Barrios-Martí, J., Basa, S., Bertin, V., Biagi, S., Bormuth, R. and Bourret, S. , ANTARES Collaboration and H.E.S.S. Collaboration (2017) A polarized fast radio burst at low Galactic latitude. Monthly Notices of the Royal Astronomical Society, 469 (4), 4465-4482. (doi:10.1093/mnras/stx1098).

Record type: Article

Abstract

We report on the discovery of a new fast radio burst (FRB), FRB 150215, with the Parkes radio telescope on 2015 February 15. The burst was detected in real time with a dispersion measure (DM) of 1105.6 ± 0.8 pc cm-3, a pulse duration of 2.8^{+1.2}_{-0.5} ms, and a measured peak flux density assuming that the burst was at beam centre of 0.7^{+0.2}_{-0.1} Jy. The FRB originated at a Galactic longitude and latitude of 24.66°, 5.28° and 25° away from the Galactic Center. The burst was found to be 43 ± 5 per cent linearly polarized with a rotation measure (RM) in the range -9 <RM <12 rad m-2 (95 per cent confidence level), consistent with zero. The burst was followed up with 11 telescopes to search for radio, optical, X-ray, γ-ray and neutrino emission. Neither transient nor variable emission was found to be associated with the burst and no repeat pulses have been observed in 17.25 h of observing. The sightline to the burst is close to the Galactic plane and the observed physical properties of FRB 150215 demonstrate the existence of sight lines of anomalously low RM for a given electron column density. The Galactic RM foreground may approach a null value due to magnetic field reversals along the line of sight, a decreased total electron column density from the Milky Way, or some combination of these effects. A lower Galactic DM contribution might explain why this burst was detectable whereas previous searches at low latitude have had lower detection rates than those out of the plane.

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Accepted/In Press date: 4 May 2017
e-pub ahead of print date: 9 May 2017
Published date: 1 August 2017
Keywords: polarization, methods: data analysis, surveys, ISM: structure

Identifiers

Local EPrints ID: 413726
URI: https://eprints.soton.ac.uk/id/eprint/413726
ISSN: 0035-8711
PURE UUID: dad8e240-9a4f-4b66-b426-0eff39e20f6a
ORCID for M. Sullivan: ORCID iD orcid.org/0000-0001-9053-4820

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Date deposited: 01 Sep 2017 16:31
Last modified: 20 Jul 2019 00:40

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Contributors

Author: E. Petroff
Author: S. Burke-Spolaor
Author: E. F. Keane
Author: M. A. McLaughlin
Author: R. Miller
Author: I. Andreoni
Author: M. Bailes
Author: E. D. Barr
Author: S. R. Bernard
Author: S. Bhandari
Author: N. D. R. Bhat
Author: M. Burgay
Author: M. Caleb
Author: D. Champion
Author: P. Chandra
Author: J. Cooke
Author: V. S. Dhillon
Author: J. S. Farnes
Author: L. K. Hardy
Author: P. Jaroenjittichai
Author: S. Johnston
Author: M. Kasliwal
Author: M. Kramer
Author: S. P. Littlefair
Author: J. P. Macquart
Author: M. Mickaliger
Author: A. Possenti
Author: T. Pritchard
Author: V. Ravi
Author: A. Rest
Author: A. Rowlinson
Author: U. Sawangwit
Author: B. Stappers
Author: M. Sullivan ORCID iD
Author: C. Tiburzi
Author: W. van Straten
Author: A. Albert
Author: M. André
Author: M. Anghinolfi
Author: G. Anton
Author: M. Ardid
Author: J.-J. Aubert
Author: T. Avgitas
Author: B. Baret
Author: J. Barrios-Martí
Author: S. Basa
Author: V. Bertin
Author: S. Biagi
Author: R. Bormuth
Author: S. Bourret

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