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Gaia Radial Velocity Spectrometer

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arxiv 1804.09369 v1 pith:4RB4XZKH submitted 2018-04-25 astro-ph.IM

Gaia Radial Velocity Spectrometer

M. Cropper , D. Katz , P. Sartoretti , T. Prusti , J.H.J. de Bruijne , F. Chassat , P. Charvet , J. Boyadijan
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M. Perryman G. Sarri P. Gare M. Erdmann U. Munari T. Zwitter M. Wilkinson F. Arenou A. Vallenari A. G\'omez P. Panuzzo G. Seabroke C. Allende Prieto K. Benson O. Marchal H. Huckle M. Smith C. Dolding K. Jan{\ss}en Y. Viala R. Blomme S. Baker S. Boudreault F. Crifo C. Soubiran Y. Fr\'emat G. Jasniewicz A. Guerrier L.P. Guy C. Turon A. Jean-Antoine-Piccolo F. Th\'evenin M. David E. Gosset Y. Damerdji
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keywords performancedescriptiondesigngaiainstrumentradialspacespectrometer
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This paper presents the specification, design, and development of the Radial Velocity Spectrometer (RVS) on the European Space Agency's Gaia mission. Starting with the rationale for the full six dimensions of phase space in the dynamical modelling of the Galaxy, the scientific goals and derived top-level instrument requirements are discussed, leading to a brief description of the initial concepts for the instrument. The main part of the paper is a description of the flight RVS, considering the optical design, the focal plane, the detection and acquisition chain, and the as-built performance drivers and critical technical areas. After presenting the pre-launch performance predictions, the paper concludes with the post-launch developments and mitigation strategies, together with a summary of the in-flight performance at the end of commissioning.

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  1. Radial velocity and atmospheric parameter calculations for the GaiaNIR spectrograph

    astro-ph.IM 2026-07 conditional novelty 6.0

    For GaiaNIR, a 1926–1968 nm K-band window at R≈16,000–20,000 offers the best simulated balance of radial-velocity precision, atmospheric-parameter precision, and low interstellar extinction.