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    A study of spatial correlations in pulsar timing array data

    Access Status
    Fulltext not available
    Authors
    Tiburzi, C.
    Hobbs, G.
    Kerr, M.
    Coles, W.
    Dai, S.
    Manchester, R.
    Possenti, A.
    Shannon, Ryan
    You, X.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Tiburzi, C. and Hobbs, G. and Kerr, M. and Coles, W. and Dai, S. and Manchester, R. and Possenti, A. et al. 2016. A study of spatial correlations in pulsar timing array data. Monthly Notices of the Royal Astronomical Society. 455 (4): pp. 4339-4350.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stv2143
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy (Physics)
    URI
    http://hdl.handle.net/20.500.11937/15433
    Collection
    • Curtin Research Publications
    Abstract

    Pulsar timing array experiments search for phenomena that produce angular correlations in the arrival times of signals from millisecond pulsars. The primary goal is to detect an isotropic and stochastic gravitational wave background. We use simulated data to show that this search can be affected by the presence of other spatially correlated noise, such as errors in the reference time standard, errors in the planetary ephemeris, the solar wind and instrumentation issues. All these effects can induce significant false detections of gravitational waves. We test mitigation routines to account for clock errors, ephemeris errors and the solar wind. We demonstrate that it is non-trivial to find an effective mitigation routine for the planetary ephemeris and emphasize that other spatially correlated signals may be present in the data.

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