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Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run

Citation

Abbott, BP and Abbott, R and Palfreyman, J and Siellez, K and Weltervrede, P, LIGO Scientific Collaboration and Virgo Collaboration, Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run, Physical Review D: covering particles, fields, gravitation, and cosmology, 99, (12) Article 122002. ISSN 2470-0010 (2019) [Refereed Article]


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Copyright Statement

2019 American Physical Society. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. Must link to published article.

DOI: doi:10.1103/PhysRevD.99.122002

Abstract

Isolated spinning neutron stars, asymmetric with respect to their rotation axis, are expected to be sources of continuous gravitational waves. The most sensitive searches for these sources are based on accurate matched filtering techniques that assume the continuous wave to be phase locked with the pulsar beamed emission. While matched filtering maximizes the search sensitivity, a significant signal-to-noise ratio loss will happen in the case of a mismatch between the assumed and the true signal phase evolution. Narrow-band algorithms allow for a small mismatch in the frequency and spin-down values of the pulsar while coherently integrating the entire dataset. In this paper, we describe a narrow-band search using LIGO O2 data for the continuous wave emission of 33 pulsars. No evidence of a continuous wave signal is found, and upper limits on the gravitational wave amplitude over the analyzed frequency and spin-down ranges are computed for each of the targets. In this search, we surpass the spin-down limit, namely, the maximum rotational energy loss due to gravitational waves emission for some of the pulsars already present in the LIGO O1 narrow-band search, such as J1400−6325, J1813−1246, J1833−1034, J1952+3252, and for new targets such as J0940−5428 and J1747−2809. For J1400−6325, J1833−1034, and J1747−2809, this is the first time the spin-down limit is surpassed.

Item Details

Item Type:Refereed Article
Keywords:Narrow-band search, gravitational waves, pulsars, LIGO, neutron stars
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:General relativity and gravitational waves
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Palfreyman, J (Ms Jane Palfreyman)
UTAS Author:Siellez, K (Dr Karelle Siellez)
ID Code:151936
Year Published:2019
Web of Science® Times Cited:35
Deposited By:Physics
Deposited On:2022-08-09
Last Modified:2022-09-26
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