Establish whether GW231123 exhibits measurable spin precession

Determine whether the gravitational-wave signal GW231123 shows statistically significant spin precession by constructing a robust assessment that overcomes the present ambiguity indicated by precession signal-to-noise ratio and Bayes-factor analyses.

Background

The authors compute Bayes factors favoring precession and a precession SNR, but due to uncertainties and model disagreements they cannot make a confident claim of precession for GW231123.

Clarifying the presence or absence of precession in this event would inform constraints on spin orientations, recoil velocities, and formation scenarios.