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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 7.
Bounds from the FTI and TIGER tests on the PN coefficients in the inspiral part of the signal. For higher-order PN terms, the bounds improve on similar previously presented constraints from GW170817 (B. P. Abbott et al. 2019) and in some cases are tighter than bounds from the entire GWTC-2 and GWTC-3 populations (R. Abbott et al. 2025, 2021). The FTI analysis employs uniform priors in the range [−1, 1] for ﹩\delta {\hat{\chi }}_{-2}﹩ and [−20, 20] for all other parameters. The TIGER analysis employs uniform priors in the ranges [−0.1, 0.1] for ﹩\delta {\hat{\chi }}_{-2}﹩; [−5.0, 5.0] for ﹩\delta {\hat{\chi }}_{0}﹩; [−2.0, 2.0] for ﹩\delta {\hat{\chi }}_{1}﹩, ﹩\delta {\hat{\chi }}_{2}﹩, and ﹩\delta {\hat{\chi }}_{3}﹩; [−20.0, 20.0] for ﹩\delta {\hat{\chi }}_{4}﹩, ﹩\delta {\hat{\chi }}_{5l}﹩, and ﹩\delta {\hat{\chi }}_{6}﹩; and [−30.0, 30.0] for ﹩\delta {\hat{\chi }}_{6l}﹩ and ﹩\delta {\hat{\chi }}_{7}﹩.
© 2026. The Author(s). Published by the American Astronomical Society.