The 4MOST instrument concept overview

Roger Haynes, Sam Barden, Roelof de Jong, Olivier Schnurr, Olga Bellido, Jakob Walcher, Dionne Haynes, Roland Winkler, Svend-Marian Bauer, Frank Dionies, Allar Saviauk, Cristina Chiappini, Axel Schwope, Joar Brynnel, Matthias Steinmetz, Richard McMahon, Sofia Feltzing, Patrick Francois, Scott Trager, Ian ParryMike Irwin, Nicholas Walton, David King, David Sun, Eduaro Gonzalez-Solares, Ian Tosh, Gavin Dalton, Kevin Middleton, Piercarlo Bonifacio, Pascal Jagourel, Shan. Mignot, Mathieu Cohen, Jean-Philippe Amans, Frederic Royer, Paola Sartoretti, Johan Pragt, Gerrit Gerlofsma, Ronald Roelfsema, Ramon Navarro, Guido Thimm, Walter Seifert, Norbert Christleib, Holger Mandel, Trifon Trifonov, Wenli Xu, Florian Lang-Bardl, Bernard Muschielok, Jeorg Schlichter, Hans-Joachim Hess, Frank Grupp, Hans Boehringer, Thomas Boller, Tom Dwelly, Ralf Bender, Piero Rosati, Olaf Iwert, Gert Finger, Jean-Louis Lizon L'Allemand, Will Saunders, Andrew Sheinis, Gabriella Frost, Tony Farrell, Lew Waller, Eric Depagne, Florence Laurent, Patrick Caillier, Johan Kosmalski, Johan Richard, Roland Bacon, Wolfgang Ansorge

    Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review


    The 4MOST([1]) instrument is a concept for a wide-field, fibre-fed high multiplex spectroscopic instrument facility on the ESO VISTA telescope designed to perform a massive (initially >25x10(6) spectra in 5 years) combined all-sky public survey. The main science drivers are: Gaia follow up of chemo-dynamical structure of the Milky Way, stellar radial velocities, parameters and abundances, chemical tagging; eROSITA follow up of cosmology with x-ray clusters of galaxies, X-ray AGN/galaxy evolution to z similar to 5, Galactic X-ray sources and resolving the Galactic edge; Euclid/LSST/SKA and other survey follow up of Dark Energy, Galaxy evolution and transients. The surveys will be undertaken simultaneously requiring: highly advanced targeting and scheduling software, also comprehensive data reduction and analysis tools to produce high-level data products. The instrument will allow simultaneous observations of similar to 1600 targets at R similar to 5,000 from 390-900nm and similar to 800 targets at R>18,000 in three channels between similar to 395-675nm (channel bandwidth: 45nm blue, 57nm green and 69nm red) over a hexagonal field of view of similar to 4.1 degrees2. The initial 5-year 4MOST survey is currently expect to start in 2020. We provide and overview of the 4MOST systems: opto-mechanical, control, data management and operations concepts; and initial performance estimates.
    Original languageEnglish
    Title of host publicationGround-based and Airborne Instrumentation for Astronomy V
    Publication statusPublished - 2014
    Event5th Conference on Ground-Based and Airborne Instrumentation for Astronomy - Montreal, Canada
    Duration: 2014 Jun 222014 Jun 26

    Publication series

    ISSN (Print)1996-756X
    ISSN (Electronic)0277-786X


    Conference5th Conference on Ground-Based and Airborne Instrumentation for Astronomy

    Subject classification (UKÄ)

    • Astronomy, Astrophysics and Cosmology

    Free keywords

    • 4MOST
    • VISTA
    • spectroscopic facility
    • wide field MOS
    • multi-object
    • optical fibre
    • system design


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