Developing an integrated concept for the E-ELT Multi-Object Spectrograph   (MOSAIC): design issues and trade-offs
  We present a discussion of the design issues and trade-offs that have been considered in putting together a new concept for MOSAIC, the multi-object spectrograph for the E-ELT. MOSAIC aims to address the combined science cases for E-ELT MOS that arose from the earlier studies of the multi-object and multi-adaptive optics instruments. MOSAIC combines the advantages of a highly-multiplexed instrument targeting single-point objects with one which has a more modest multiplex but can spatially resolve a source with high resolution (IFU). These will span across two wavebands: visible and near-infrared. 
Myriam Rodrigues, Gavin Dalton, Ewan Fitzsimons, Fanny Chemla, Tim   Morris, Francois Hammer, Mathieu Puech, Christopher Eva...
astro-ph.IM