The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design
arxiv(2024)
Abstract
BlueMUSE is a blue-optimised, medium spectral resolution, panoramic integral
field spectrograph under development for the Very Large Telescope (VLT). With
an optimised transmission down to 350 nm, spectral resolution of R∼3500 on
average across the wavelength range, and a large FoV (1 arcmin^2), BlueMUSE
will open up a new range of galactic and extragalactic science cases
facilitated by its specific capabilities. The BlueMUSE consortium includes 9
institutes located in 7 countries and is led by the Centre de Recherche
Astrophysique de Lyon (CRAL). The BlueMUSE project development is currently in
Phase A, with an expected first light at the VLT in 2031. We introduce here the
Top Level Requirements (TLRs) derived from the main science cases, and then
present an overview of the BlueMUSE system and its subsystems fulfilling these
TLRs. We specifically emphasize the tradeoffs that are made and the key
distinctions compared to the MUSE instrument, upon which the system
architecture is built.
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