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https://hdl.handle.net/2440/107481
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Type: | Journal article |
Title: | A polarized fast radio burst at low Galactic latitude |
Author: | Petroff, E. Burke-Spolaor, S. Keane, E. McLaughlin, M. Miller, R. Andreoni, I. Bailes, M. Barr, E. Bernard, S. Bhandari, S. Bhat, N. Burgay, M. Caleb, M. Champion, D. Chandra, P. Cooke, J. Dhillon, V. Farnes, J. Hardy, L. Jaroenjittichai, P. et al. |
Citation: | Monthly Notices of the Royal Astronomical Society, 2017; 469(4):4465-4482 |
Publisher: | Oxford University Press |
Issue Date: | 2017 |
ISSN: | 0035-8711 1365-2966 |
Statement of Responsibility: | E. Petroff ... The ANTARES Collaboration ... R. Blackwell ... P. deWilt ... J. Hawkes ... J. Lau ... N. Maxted ... G. Rowell ... F. Voisin ... et al. |
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. |
Keywords: | Polarization; methods: data analysis; surveys; ISM: structure |
Description: | Advance Access publication 2017 May 9 |
Rights: | © 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society |
DOI: | 10.1093/mnras/stx1098 |
Grant ID: | http://purl.org/au-research/grants/arc/CE1101020 http://purl.org/au-research/grants/arc/FL150100148 ARC |
Published version: | http://dx.doi.org/10.1093/mnras/stx1098 |
Appears in Collections: | Aurora harvest 3 Physics publications |
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