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Precision of localization of single gravitational-wave source with pulsar timing array

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arxiv 2308.10419 v2 pith:WZSDIWPQ submitted 2023-08-21 gr-qc astro-ph.HE

Ryo Kato , Keitaro Takahashi This is my paper · ORCID
classification gr-qcastro-ph.HE
keywords sourceprecisionlocationptastimingdistanceexpectedgravitational
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Pulsar Timing Arrays (PTAs) are expected to be able to detect gravitational waves (GWs) from individual supermassive black hole binaries in the near future. In order to identify the host galaxy of a gravitational wave source, the angular resolution of PTAs should be much better than that expected from the conventional methodology of PTAs. We study the potential usefulness of precise pulsar-distance measurements in the determination of the sky location of a single GW source. Precise distance information from external observations such as astrometry by Very Long Baseline Interferometry is incorporated as priors in the PTA analysis and we evaluate the precision of the sky location of a GW source by simulating PTA data of 12 milli-second pulsars with only the GW signal and the Gaussian white noise in the timing residuals. We show that only a few pulsars with a distance precision of 1 pc will improve the precision of the source location by more than 1 order in the presence of white noise of 10 ns.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Unlocking Gravity and Gravitational Waves with Radio Pulsars: Advances and Challenges

    astro-ph.HE 2025-07 conditional novelty 4.0 of 10

    This review summarizes pulsar-based gravity tests and updates simulations predicting that the Double Pulsar will yield a neutron star moment of inertia measurement to about 5% by 2038.

  2. The SKAO Pulsar Timing Array

    astro-ph.IM 2026-07 accept novelty 3.5 of 10

    An SKAO PTA with ~174 millisecond pulsars can dominate nanohertz GW sensitivity within four years and enable continuous-wave detections plus anisotropy maps of the gravitational-wave background.

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