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GW230814: Investigation of a Loud Gravitational-wave Signal Observed with a Single Detector
A. G. Abac et al 2026 The Astrophysical Journal Letters 1004 .
Caption: Figure 17.
Distribution of ﹩{\mathrm{log}}_{10}{{ \mathcal B }}_{{\rm{SEOBNR}}}^{{\rm{pSEOBNR}}}﹩ vs. ﹩1-{\rm{CI}}(\delta {\hat{f}}_{220}=\delta {\hat{\tau }}_{220}=0)﹩, the posterior exclusion of the GR-consistent values of damping time and frequency from the pSEOBNR pipeline. Shown are results from zero-noise NRSur injections (blue), Gaussian noise SEOBNR injections (green), and real-noise injections using either SEOBNR (red) or NRSur (yellow). Gaussian noise or waveform systematics alone do not yield Bayes factors as large as GW230814’s. In contrast, real noise, especially when combined with systematics, can reproduce or exceed GW230814’s Bayes factor in 50% of the cases.
© 2026. The Author(s). Published by the American Astronomical Society.