4MOST: 4-metre multi-object spectroscopic telescope

Roelof S. de Jong; Olga Bellido-Tirado; Cristina Chiappini; Éric Depagne; Roger Haynes; Diana Johl; Olivier Schnurr; Axel Schwope; Jakob Walcher; Frank Dionies; Dionne Haynes; Andreas Kelz; Francisco S. Kitaura; Georg Lamer; Ivan Minchev; Volker Müller; Sebastián E. Nuza; Jean-Christophe Olaya; Tilmann Piffl; Emil Popow; Matthias Steinmetz; Ugur Ural; Mary Williams; Roland Winkler; Lutz Wisotzki; Wolfgang R. Ansorge; Manda Banerji; Eduardo Gonzalez Solares; Mike Irwin; Robert C. Kennicutt Jr.; Dave King; Richard G. McMahon; Sergey Koposov; Ian R. Parry; David Sun; Nicholas A. Walton; Gert Finger; Olaf Iwert; Mirko Krumpe; Jean-Louis Lizon; Mainieri Vincenzo; Jean-Philippe Amans; Piercarlo Bonifacio; Mathieu Cohen; Patrick Francois; Pascal Jagourel; Shan B. Mignot; Frédéric Royer; Paola Sartoretti; Ralf Bender; Frank Grupp; Hans-Joachim Hess; Florian Lang-Bardl; Bernard Muschielok; Hans Böhringer; Thomas Boller; Angela Bongiorno; Marcella Brusa; Tom Dwelly; Andrea Merloni; Kirpal Nandra; Mara Salvato; Johannes H. Pragt; Ramón Navarro; Gerrit Gerlofsma; Ronald Roelfsema; Gavin B. Dalton; Kevin F. Middleton; Ian A. Tosh; Corrado Boeche; Elisabetta Caffau; Norbert Christlieb; Eva K. Grebel; Camilla Hansen; Andreas Koch; Hans-G. Ludwig; Andreas Quirrenbach; Luca Sbordone; Walter Seifert; Guido Thimm; Trifon Trifonov; Amina Helmi; Scott C. Trager; Sofia Feltzing; Andreas Korn; Wilfried Boland

doi:10.1117/12.926239

5 October 2012 4MOST: 4-metre multi-object spectroscopic telescope

Roelof S. de Jong, Olga Bellido-Tirado, Cristina Chiappini, Éric Depagne, Roger Haynes, Diana Johl, Olivier Schnurr, Axel Schwope, Jakob Walcher, Frank Dionies, Dionne Haynes, Andreas Kelz, Francisco S. Kitaura, Georg Lamer, Ivan Minchev, Volker Müller, Sebastián E. Nuza, Jean-Christophe Olaya, Tilmann Piffl, Emil Popow, Matthias Steinmetz, Ugur Ural, Mary Williams, Roland Winkler, Lutz Wisotzki, Wolfgang R. Ansorge, Manda Banerji, Eduardo Gonzalez Solares, Mike Irwin, Robert C. Kennicutt Jr., Dave King, Richard G. McMahon, Sergey Koposov, Ian R. Parry, David Sun, Nicholas A. Walton, Gert Finger, Olaf Iwert, Mirko Krumpe, Jean-Louis Lizon, Mainieri Vincenzo, Jean-Philippe Amans, Piercarlo Bonifacio, Mathieu Cohen, Patrick Francois, Pascal Jagourel, Shan B. Mignot, Frédéric Royer, Paola Sartoretti, Ralf Bender, Frank Grupp, Hans-Joachim Hess, Florian Lang-Bardl, Bernard Muschielok, Hans Böhringer, Thomas Boller, Angela Bongiorno, Marcella Brusa, Tom Dwelly, Andrea Merloni, Kirpal Nandra, Mara Salvato, Johannes H. Pragt, Ramón Navarro, Gerrit Gerlofsma, Ronald Roelfsema, Gavin B. Dalton, Kevin F. Middleton, Ian A. Tosh, Corrado Boeche, Elisabetta Caffau, Norbert Christlieb, Eva K. Grebel, Camilla Hansen, Andreas Koch, Hans-G. Ludwig, Andreas Quirrenbach, Luca Sbordone, Walter Seifert, Guido Thimm, Trifon Trifonov, Amina Helmi, Scott C. Trager, Sofia Feltzing, Andreas Korn, Wilfried Boland

Author Affiliations +

Proceedings Volume 8446, Ground-based and Airborne Instrumentation for Astronomy IV; 84460T (2012) https://doi.org/10.1117/12.926239
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The 4MOST consortium is currently halfway through a Conceptual Design study for ESO with the aim to develop a wide-field ( < 3 square degree, goal < 5 square degree), high-multiplex ( < 1500 fibres, goal 3000 fibres) spectroscopic survey facility for an ESO 4m-class telescope (VISTA). 4MOST will run permanently on the telescope to perform a 5 year public survey yielding more than 20 million spectra at resolution R∼5000 (λ=390–1000 nm) and more than 2 million spectra at R~20,000 (395–456.5 nm and 587–673 nm). The 4MOST design is especially intended to complement three key all-sky, space-based observatories of prime European interest: Gaia, eROSITA and Euclid. Initial design and performance estimates for the wide-field corrector concepts are presented. Two fibre positioner concepts are being considered for 4MOST. The first one is a Phi-Theta system similar to ones used on existing and planned facilities. The second one is a new R-Theta concept with large patrol area. Both positioner concepts effectively address the issues of fibre focus and pupil pointing. The 4MOST spectrographs are fixed configuration two-arm spectrographs, with dedicated spectrographs for the high- and low-resolution fibres. A full facility simulator is being developed to guide trade-off decisions regarding the optimal field-of-view, number of fibres needed, and the relative fraction of high-to-low resolution fibres. The simulator takes mock catalogues with template spectra from Design Reference Surveys as starting point, calculates the output spectra based on a throughput simulator, assigns targets to fibres based on the capabilities of the fibre positioner designs, and calculates the required survey time by tiling the fields on the sky. The 4MOST consortium aims to deliver the full 4MOST facility by the end of 2018 and start delivering high-level data products for both consortium and ESO community targets a year later with yearly increments.

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Roelof S. de Jong, Olga Bellido-Tirado, Cristina Chiappini, Éric Depagne, Roger Haynes, Diana Johl, Olivier Schnurr, Axel Schwope, Jakob Walcher, Frank Dionies, Dionne Haynes, Andreas Kelz, Francisco S. Kitaura, Georg Lamer, Ivan Minchev, Volker Müller, Sebastián E. Nuza, Jean-Christophe Olaya, Tilmann Piffl, Emil Popow, Matthias Steinmetz, Ugur Ural, Mary Williams, Roland Winkler, Lutz Wisotzki, Wolfgang R. Ansorge, Manda Banerji, Eduardo Gonzalez Solares, Mike Irwin, Robert C. Kennicutt Jr., Dave King, Richard G. McMahon, Sergey Koposov, Ian R. Parry, David Sun, Nicholas A. Walton, Gert Finger, Olaf Iwert, Mirko Krumpe, Jean-Louis Lizon, Mainieri Vincenzo, Jean-Philippe Amans, Piercarlo Bonifacio, Mathieu Cohen, Patrick Francois, Pascal Jagourel, Shan B. Mignot, Frédéric Royer, Paola Sartoretti, Ralf Bender, Frank Grupp, Hans-Joachim Hess, Florian Lang-Bardl, Bernard Muschielok, Hans Böhringer, Thomas Boller, Angela Bongiorno, Marcella Brusa, Tom Dwelly, Andrea Merloni, Kirpal Nandra, Mara Salvato, Johannes H. Pragt, Ramón Navarro, Gerrit Gerlofsma, Ronald Roelfsema, Gavin B. Dalton, Kevin F. Middleton, Ian A. Tosh, Corrado Boeche, Elisabetta Caffau, Norbert Christlieb, Eva K. Grebel, Camilla Hansen, Andreas Koch, Hans-G. Ludwig, Andreas Quirrenbach, Luca Sbordone, Walter Seifert, Guido Thimm, Trifon Trifonov, Amina Helmi, Scott C. Trager, Sofia Feltzing, Andreas Korn, and Wilfried Boland "4MOST: 4-metre multi-object spectroscopic telescope", Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84460T (5 October 2012); https://doi.org/10.1117/12.926239

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