The ARCHES project
  ARCHES (Astronomical Resource Cross-matching for High Energy Studies) is a FP7-Space funded project whose aim is to provide the international astronomical community with well-characterised multi-wavelength data in the form of spectral energy distributions (SEDs) for large samples of objects extracted from the 3XMM DR5 X-ray catalogue of serendipitous sources. The project has developed new tools implementing fully probabilistic simultaneous cross-correlation of several catalogues for unresolved sources and a multi-wavelength finder for clusters of galaxies for extended sources. These enhanced resources have been tested in the framework of several science cases. 
C. Motch, F. Carrera, F. Genova, F. Jim\'enez- Esteban, M. L\'opez, L.   Michel, B. Mingo, A. Mints, A. Nebot G\'omez-Mor\'a...
astro-ph.IM astro-ph.GA astro-ph.HE