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- W3103149075 abstract "A primary goal of numerical relativity is to provide estimates of the wave strain, $h$, from strong gravitational wave sources, to be used in detector templates. The simulations, however, typically measure waves in terms of the Weyl curvature component, $psi_4$. Assuming Bondi gauge, transforming to the strain $h$ reduces to integration of $psi_4$ twice in time. Integrations performed in either the time or frequency domain, however, lead to secular non-linear drifts in the resulting strain $h$. These non-linear drifts are not explained by the two unknown integration constants which can at most result in linear drifts. We identify a number of fundamental difficulties which can arise from integrating finite length, discretely sampled and noisy data streams. These issues are an artifact of post-processing data. They are independent of the characteristics of the original simulation, such as gauge or numerical method used. We suggest, however, a simple procedure for integrating numerical waveforms in the frequency domain, which is effective at strongly reducing spurious secular non-linear drifts in the resulting strain." @default.
- W3103149075 created "2020-11-23" @default.
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- W3103149075 date "2011-09-14" @default.
- W3103149075 modified "2023-10-03" @default.
- W3103149075 title "Notes on the integration of numerical relativity waveforms" @default.
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- W3103149075 doi "https://doi.org/10.1088/0264-9381/28/19/195015" @default.
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