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    • MOONS – Multi Object Spectroscopy for the VLT: Integration and Tests of the Field Corrector and the Rotating Front End

    Alexandre Cabral,Manuel Abreu,Joao M. P. Coelho,Pedro Santos,Antonio Oliveira,Ines Leite,Jose Afonso,Phil Rees, Raziye Artan,David Lee,Oscar Gonzalez,Stephen Watson,William Taylor,Stephen Chittick,Ian Bryson,Isabelle Guinouard,Michele Cirasuolo,Paolo Spano

    Ground-based and Airborne Instrumentation for Astronomy IX（2022）

    Univ Lisbon

    Cited 3|Views26
    Abstract
    MOONS will be the next Multi-Object Optical and Near-infrared Spectrograph for the Very Large Telescope, able to simultaneously observe 1000 targets, feeding a set of optical fibres which can be placed at user-specified locations on the Nasmyth focal plane using individual robotic positioners. The sub-fields thus selected are then driven by the fibres into two identical cryogenic spectrographs mounted on the Nasmyth platform of one of the ESO VLT 8 m telescopes. The instrument will provide both medium and high-resolution spectral coverage across the wavelength range of 0.65 mu m to 1.8 mu m. In this paper we will describe the manufacturing, integration and tests of the two components that interface with the telescope: the MOONS Field Corrector (FC) and the Rotating Front End (RFE) Assemblies. The FC optics will correct the off-axis aberrations of the telescope, as well as determining the shape of the focal surface and the pupil location. The RFE assembly consists of a rotating part, which will be mounted on the VLT Nasmyth Rotator, and be connected to the two static Spectrographs via fibre assemblies, and all the sub-assemblies that give support to the fibre positioning, metrology and calibration units.
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    Key words
    multi object spectrograph,VLT spectrograph,Field Corrector,Front End
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