Continuous-Wave Strain from a Single Nearby Supermassive Binary

This paper asks a single question: What strain would one nearby supermassive binary present to a timing array, and how far is that from published single-source sensitivities? Working from the published common-process amplitude of 2.4e-15 in characteristic strain at one cycle per year and the standard binary spectral index of thirteen thirds, the study computes the relevant quantities by the continuous-wave strain from a circular binary at luminosity distance D with chirp mass M_c and observed frequency f. The headline computed values are strain_at_100Mpc = 5.517400302105543e-15. These values are compared throughout with the published pulsar-timing values from the North American, European, Parkes and Chinese arrays. The calculation is fully reproducible from the deposited code, and every headline number appears in the accompanying results file. This study is simulated and computed from stated assumptions; it is not a measurement, and no new timing data are presented.