qnmfits and KerrRingdown are two independently written, cross-verified software packages for performing multimode ringdown fits to numerical relativity waveforms.
General existence proof for rest frame systems in asymptotically flat space-time
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abstract
We report a new result on the nice section construction used in the definition of rest frame systems in general relativity. This construction is needed in the study of non trivial gravitational radiating systems. We prove existence, regularity and non-self-crossing property of solutions of the nice section equation for general asymptotically flat space times. This proves a conjecture enunciated in a previous work.
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Multimode ringdown modelling with $\texttt{qnmfits}$ and $\texttt{KerrRingdown}$
qnmfits and KerrRingdown are two independently written, cross-verified software packages for performing multimode ringdown fits to numerical relativity waveforms.