2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/124073We discuss the transition from quasi-circular inspiral to plunge of a system of two nonrotating black holes of masses $m_1$ and $m_2$ in the extreme mass ratio limit $m_1m_2\ll (m_1+m_2)^2$. In this limit, we compare the merger waveforms obtained by two different methods: a {\it numerical} (Regge-Wheeler-Zerilli) one, and an {\it analytical} (Effective One Body) one. This is viewed as a contribution to the matching between analytical and numerical methods.3 pages, 1 figure. Revised version. To appear in the proceedings of the 11th Marcel Grossmann Meeting on General Relativity, Berlin, July 23-29 2006General Relativity and Quantum Cosmologytext