Presentation

The timing of radio pulsars provides a tool for studying a wide range of fundamental physical and astro-physical problems. The best results are obtained by regular, frequent timing observations of a large number of sources at various frequencies. The limited availability of observing time at the largest radio telescopes mandates that coordinated efforts be made in Europe and, for this purpose, the "European Pulsar Timing Array" (EPTA) has been established with a MoU signed on early 2006 by the major european pulsar groups. With time, the EPTA project has evolved and gathers today a wider community of astronomers and physicists, including theoretical aspects, data analysis and modeling, in addition to the initial instrumental and observational programmes. The aim is to perform world-class science, fosters the relationship between radio observatories and theoretical groups, towards a first detection of gravitational waves in the micro-nanoHz domain.