A. Lundgren, R. O'Shaughnessy
Current searches for gravitational waves from compact binaries use templates where the binary does not precess. By contrast, generic black hole-neutron star binaries will significantly precess, inducing modulations that nonprecessing searches are particularly ill-suited to recover. In this paper we provide a closed-form representation of the single-spin precessing waveform in the frequency domain by reorganizing the signal as a sum over harmonics, each of which resembles a nonprecessing waveform. This form enables simple analytic calculations (e.g., a Fisher matrix) and computationally fast frequency-domain templates. We have verified that our \texttt{SpinTaylorF2SingleSpin} model is faithful to the time-domain \texttt{SpinTaylorT2} model: for the majority of generic BH-NS binaries, the corresponding signals generated from each model agree to better than 1%. Our waveform model is now available as part of the publicly-available \texttt{lalsimulation} waveform-generation code.
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http://arxiv.org/abs/1304.3332
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