MOONS – multi object spectroscopy for the VLT: integration and tests of the field corrector and the rotating front end

Alexandre Cabral; Manuel Abreu; João M. P. Coelho; Pedro Santos; António Oliveira; Inês Leite; José Afonso; Phil Rees; Raziye Artan; David Lee; Oscar González; Stephen Watson; William Taylor; Stephen Chittick; Ian Bryson; Isabelle Guinouard; Michele Cirasuolo; Paolo Spanò

doi:10.1117/12.2628923

29 August 2022 MOONS – multi object spectroscopy for the VLT: integration and tests of the field corrector and the rotating front end

Alexandre Cabral, Manuel Abreu, João M. P. Coelho, Pedro Santos, António Oliveira, Inês Leite, José Afonso, Phil Rees, Raziye Artan, David Lee, Oscar González, Stephen Watson, William Taylor, Stephen Chittick, Ian Bryson, Isabelle Guinouard, Michele Cirasuolo, Paolo Spanò

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121846P (2022) https://doi.org/10.1117/12.2628923
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

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 μm to 1.8 μm. 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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Alexandre Cabral, Manuel Abreu, João M. P. Coelho, Pedro Santos, António Oliveira, Inês Leite, José Afonso, Phil Rees, Raziye Artan, David Lee, Oscar González, Stephen Watson, William Taylor, Stephen Chittick, Ian Bryson, Isabelle Guinouard, Michele Cirasuolo, and Paolo Spanò "MOONS – multi object spectroscopy for the VLT: integration and tests of the field corrector and the rotating front end", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121846P (29 August 2022); https://doi.org/10.1117/12.2628923

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