-`precession` is an Python module to study the dynamics of precessing black-hole binaries using multi-timescale methods. The code provides a comprehensive toolbox to (i) capture the black-hole dynamics on the spin-precession timescale in closed form, (ii) average generic quantities over a precession period, (iii) numerically integrate the binary inspiral using both orbit- and precession-averaged approximations, (v) evaluate spin-precession estimators to be used in gravitational-wave astronomy, and (vi) estimate the remnant properties. Key applications include propagating gravitational-wave posterior samples as well as population-synthesis predictions of astrophysical nature.
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