Multimode Kerr Ringdown Fitting for Precessing BBH Mergers

Multimode fitting of the ringdown signal for a precessing BBH merger system is investigated. We explore numerically generated waveforms from the Simulating eXtreme Spacetimes(SXS) catalog. Fitting cases with different combinations of simulation modes and QNM modes are explored. The overall quality of the fits and the fidelity of the QNM expansion coefficients extracted from the fitting is investigated from two perspectives, that of the relative and the absolute amplitudes.