Issue |
2010
|
|
---|---|---|
Article Number | 02008 | |
Number of page(s) | 6 | |
Section | AO systems and instrumental concepts | |
DOI | https://doi.org/10.1051/ao4elt/201002008 | |
Published online | 24 February 2010 |
EAGLE multi-object AO concept study for the E-ELT
1
LESIA, Observatoire de Paris, Université Paris Diderot,
5 place J. Janssen, 92190
Meudon, France
2
ONERA, 29 Av. de la division Leclerc, 92322, Châtillon, France
3
Durham University, Department of Physics, South Road, Durham
DH1 3LE
UK
4
GEPI, Observatoire de Paris, Université Paris Diderot,
5 place J. Janssen, 92190
Meudon, France
5
UK Astronomy Technology Centre, Blackford Hill, Edinburgh, EH9 3HJ,
UK
6
LAM, Technopôle de Marseille-Etoile, 38 rue F. Joliot-Curie, 13388
Marseille cedex 13
a e-mail: gerard.rousset@obspm.fr
EAGLE is the multi-object spatially-resolved near-IR spectrograph instrument concept for the EELT, relying on a distributed Adaptive Optics, so-called Multi Object Adaptive Optics. This paper presents the results of a phase A study. Using 84x84 actuator deformable mirrors, the performed analysis demonstrates that 6 laser guide stars and up to 5 natural guide stars of magnitude R < 17, picked-up in a 7.3′ diameter patrol field of view, allow us to obtain an overall performance in terms of Ensquared Energy of 35% in a 75x75mas2 spaxel at H band whatever the target direction in the centred 5′ science field for median seeing conditions. The computed sky coverage at galactic latitudes |b| ∼ 60 is close to 90%.
© Owned by the authors, published by EDP Sciences, 2010