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

LIGO Scientific Collaboration and Virgo Collaboration

Research output: Contribution to JournalArticleAcademicpeer-review

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.

Original languageEnglish
Article number122002
Pages (from-to)1-20
Number of pages20
JournalPhysical Review D
Volume99
Issue number12
DOIs
Publication statusPublished - 27 Jun 2019

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LIGO (observatory)
pulsars
gravitational waves
narrowband
continuous radiation
metal spinning
neutron stars
signal to noise ratios
energy dissipation
sensitivity

Cite this

LIGO Scientific Collaboration and Virgo Collaboration. / Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run. In: Physical Review D. 2019 ; Vol. 99, No. 12. pp. 1-20.
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title = "Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run",
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.",
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Zhang and C. Zhao and M. Zhou and Z. Zhou and Zhu, {X. J.} and Zucker, {M. E.} and J. Zweizig and M. Keith and M. Kerr and L. Kuiper and Harding, {A. K.} and A. Lyne and J. Palfreyman and B. Stappers and P. Weltervrede and {LIGO Scientific Collaboration and Virgo Collaboration}",
year = "2019",
month = "6",
day = "27",
doi = "10.1103/PhysRevD.99.122002",
language = "English",
volume = "99",
pages = "1--20",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "12",

}

Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run. / LIGO Scientific Collaboration and Virgo Collaboration.

In: Physical Review D, Vol. 99, No. 12, 122002, 27.06.2019, p. 1-20.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run

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AU - Palfreyman, J.

AU - Stappers, B.

AU - Weltervrede, P.

AU - LIGO Scientific Collaboration and Virgo Collaboration

PY - 2019/6/27

Y1 - 2019/6/27

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85068965834&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068965834&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.99.122002

DO - 10.1103/PhysRevD.99.122002

M3 - Article

VL - 99

SP - 1

EP - 20

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 12

M1 - 122002

ER -