MULTI-WAVELENGTH SPECTROSCOPY REQUIREMENTS

How useful are existing Virtual Observatory standards and models for comparing multi-wavelength data? We outline some science use cases involving spectral energy distributions from radio to X-ray and see whether the VO can provide access to the required data and tools and, if so, whether they are easy to find and use. We look at the requirements for handling radio data in more detail, including data cubes, polarisation, and the use of high-resolution maser spectra to investigate circumnuclear ma-terial in distant galaxies