ESPRESSO: A High Resolution Spectrograph for the Combined Coudé Focus of the VLT

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In the frame of the call for proposal for the E-ELT instrumentation studies, the CODEX team carried out the feasibility study for a spectrograph for extremely stable Doppler measurements. The CODEX project and its scientific goals are described in [L. Pasquini, S. Cristiani et al. in Messenger 122, 10 (2005)]. During the development of this study, the CODEX team recognized that a CODEX-like instrument would be of high scientific interest also on the VLT. The ESPRESSO concept was born. The contribution by J. Liske in this volume highlights the direct links between the two instruments (see also [J. Liske, A. Grazian, E. Vanzella et al. in 2008MNRAS.tmp..460L, in press]).