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The past decade and a half has seen the design and execution of severalground-based spectroscopic surveys, both Galactic and Extra-galactic.Additionally, new surveys are being designed that extend the boundaries ofcurrent surveys. In this context, many important considerations must be donewhen designing a spectrograph for the future. Among these is the determinationof the optimum wavelength coverage. In this work, we present a new code fordetermining the wavelength ranges that provide the optimal amount ofinformation to achieve the required science goals for a given survey. In itsfirst mode, it utilizes a user-defined list of spectral features to compute afigure-of-merit for different spectral configurations. The second mode utilizesa set of flux-calibrated spectra, determining the spectral regions that showthe largest differences among the spectra. Our algorithm is easily adaptablefor any set of science requirements and any spectrograph design. We apply thealgorithm to several examples, including 4MOST, showing the method yieldsimportant design constraints to the wavelength regions.

A new algorithm for optimizing the wavelength coverage for spectroscopic studies: Spectral Wavelength Optimization Code (SWOC)