EAGLE is the multi-object, spatially-resolved, near-IR spectrograph instrument concept for the E-ELT, 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 75x75 mas^2 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%.
@article{arxiv.1002.2077,
title = {EAGLE multi-object AO concept study for the E-ELT},
author = {G. Rousset and T. Fusco and F. Assemat and T. Morris and E. Gendron and R. Myers and M. Brangier and M. Cohen and N. Dipper and C. Evans and D. Gratadour and P. Jagourel and P. Laporte and D. Le Mignant and M. Puech and C. Robert and H. Schnetler and W. Taylor and F. Vidal and J. -G. Cuby and M. Lehnert and S. Morris and P. Parr-Burman},
journal= {arXiv preprint arXiv:1002.2077},
year = {2015}
}
Comments
6 pages, to appear in the proceedings of the AO4ELT conference, held in Paris, 22-26 June 2009