The FEROS instrument is a state-of-the-art bench-mounted, high-resolution, Environmentally controlled, astronomical Échelle spectrograph. It is opertated at the European Southern Observatory (ESO) in La Silla, Chile, one of the best astronomical sites in the world.

The high efficiency (~20%), large wavelength range (the complete optical spectral region in one exposure) and high resolution (R=48000) makes possible a large variety of stellar and extra-galactic spectroscopic observation programs requiring high spectral stability can be carried out.

Publications based on data obtained with the FEROS instrument should quote the following reference paper : Kaufer, A. et al. 1999, The Messenger 95, 8.

Note : The FEROS La Silla pipeline data have reduced quality in wavelength calibration during Jan/08/2006 to Jan/17/2006.

PERIOD 79 proposals preparation : The allocation of the service nights assigned for P79 to ESO programmes may be such that it implies that the periods of service may be interrupted by visitor runs or MPI observing periods. Some FEROS monitoring programmes require a significative amount of continuous nights which may lead to difficulties in their execution. These programes will be executed on the best effort basis. However, the proposers of such programmes should during phase 2 take into consideration which time indeed is available for FEROS SM and adapt their programme accordingly.