MOSAIC: the ELT multi-object spectrograph
Pascal Jagourel
(1)
,
Ewan D. Fitzsimons
(2)
,
François Hammer
(1)
,
Fatima de Frondat
(1)
,
Mathieu Puech
(1)
,
Christopher Evans
(2)
,
R. Sanchez
(2)
,
Isabelle Guinouard
(1)
,
Fanny Chemla
(1)
,
Mickael Frotin
(1)
,
Yanbin Yang
(1)
,
Philip Parr-Burman
(2)
,
Timothy J. Morris
(3)
,
Marc Dubbeldam
(3)
,
M. Close
(3)
,
Kevin F. Middleton
(4)
,
Gérard Rousset
(5, 6)
,
Éric Gendron
(5, 6)
,
Andreas Kelz
(7)
,
A. Janssen
(8)
,
Johan H. Pragt
(8)
,
Ramón Navarro
(8)
,
Marie Larrieu
(9)
,
Kacem El Hadi
(10)
,
Kjetil Dohlen
(10)
,
Gavin B. Dalton
(11)
,
I. Lewis
(11)
,
Myriam Rodrigues
(1)
,
Simon L. Morris
(3)
,
Lex Kaper
(12)
,
Beatriz Barbuy
(13)
,
Jean-Gabriel Cuby
(10)
,
Olivier Le Fèvre
(10)
1
GEPI -
Galaxies, Etoiles, Physique, Instrumentation
2 UKATC - UK Astronomy Technology Centre, Royal Observatory Edinburgh
3 Duke University [Durham]
4 STFC Rutherford Appleton Laboratory
5 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
6 Haute résolution angulaire en astrophysique
7 AIP - Leibniz-Institut für Astrophysik Potsdam
8 TNO/TPD-Space Instrumentation
9 IRAP - Institut de recherche en astrophysique et planétologie
10 LAM - Laboratoire d'Astrophysique de Marseille
11 Univ. of Oxford (United Kingdom)
12 Amsterdam
13 Departamento de Astronomia, Universidade de São Paulo
2 UKATC - UK Astronomy Technology Centre, Royal Observatory Edinburgh
3 Duke University [Durham]
4 STFC Rutherford Appleton Laboratory
5 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
6 Haute résolution angulaire en astrophysique
7 AIP - Leibniz-Institut für Astrophysik Potsdam
8 TNO/TPD-Space Instrumentation
9 IRAP - Institut de recherche en astrophysique et planétologie
10 LAM - Laboratoire d'Astrophysique de Marseille
11 Univ. of Oxford (United Kingdom)
12 Amsterdam
13 Departamento de Astronomia, Universidade de São Paulo
Résumé
Following a successful Phase A study, we introduce the delivered conceptual design of the MOSAIC1 multi-object spectrograph for the ESO Extremely Large Telescope (ELT). MOSAIC will provide R 5000 spectroscopy over the full 460-1800 nm range, with three additional high-resolution bands (R 15000) targeting features of particular interest. MOSAIC will combine three operational modes, enabling integrated-light observations of up to 200 sources on the sky (high-multiplex mode) or spectroscopy of 10 spatially-extended fields via deployable integral-field units: MOAO6 assisted high-definition (HDM) and Visible IFUs (VIFU). We will summarise key features of the sub-systems of the design, e.g. the smart tiled focal-plane for target selection and the multi-object adaptive optics used to correct for atmospheric turbulence, and present the next steps toward the construction phase.