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

The LIGO Scientific Collaboration, The Virgo Collaboration, Abbott, B. P., Abbott, R., Abbott, T. D., Abraham, S., et al. (2019). Narrow-band search for gravitational waves from known pulsars using the second LIGO observing run. Physical Review D, 99 (12 ): 122002. doi:10.1103/PhysRevD.99.122002.

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### Creators

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Creators:
The LIGO Scientific Collaboration, Author
The Virgo Collaboration, Author
Abbott, B. P., Author
Abbott, R., Author
Abbott, T. D., Author
Abraham, S., Author
Acernese, F., Author
Ackley, K., Author
Affeldt, C.1, Author
Agathos, M., Author
Agatsuma, K., Author
Aggarwal, N., Author
Aguiar, O. D., Author
Aiello, L., Author
Ain, A., Author
Ajith, P., Author
Allen, G., Author
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010
2Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290
3AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, Hannover, DE, ou_24009
4Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011
5Binary Merger Observations and Numerical Relativity, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_2461691
6Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24013
7Computational Relativistic Astrophysics, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_2541714

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Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM
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 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 integrating coherently the entire data set. In this paper we describe a narrow-band search using LIGO O2 data for the continuous wave emission of 33 pulsars. No evidence for a continuous wave signal has been found and upper-limits on the gravitational wave amplitude, over the analyzed frequency and spin-down volume, have been computed for each of the targets. In this search we have surpassed the spin-down limit for some of the pulsars already present in the O1 LIGO narrow-band search, such as J1400\textminus6325 J1813\textminus1246, J1833\textminus1034, J1952+3252, and for new targets such as J0940\textminus5428 and J1747\textminus2809. For J1400\textminus6325, J1833\textminus1034 and J1747\textminus2809 this is the first time the spin-down limit is surpassed.

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Dates: 2019-02-222019-02-252019
Publication Status: Published in print
Pages: 6 figures, 4 tables
Publishing info: -
Rev. Type: -
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Degree: -

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### Source 1

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Title: Physical Review D
Source Genre: Journal
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Pages: - Volume / Issue: 99 (12 ) Sequence Number: 122002 Start / End Page: - Identifier: -