EAGLE: a MOAO fed multi-IFU NIR workhorse for E-ELT

Cuby, Jean-Gabriel; Morris, S. L.; Fusco, Thierry; Lehnert, M. D.; Parr-Burman, P.; Rousset, G.; Amans, Jean-Philippe; Beard, Stephen; Bryson, Ian; Cohen, Mathieu; Dipper, N. A.; Evans, C. J.; Ferrari, Marc; Gendron, É.; Gimenez, Jean-Luc; Gratadour, Damien; Hastings, Peter; Hubert, Z.; Hugot, Emmanuel; Jagourel, Pascal; Laporte, Philippe; Lebrun, Vincent; Mignant, D. Le; Madec, F.; Myers, R; Neichel, Benoît; Morris, Tim; Robert, Clélia; Schnetler, Hermine; Swinbank, A. M.; Talbot, Gordon; Taylor, W. D.; Vidal, F.; Vivès, S.; Vola, Pascal; Welikala, N.; Wells, Martyn

doi:10.1117/12.856820

Cited by 24 publications

(13 citation statements)

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“…Eagle (Cuby et al 2010) is a MOAO-assisted multi-object spectrograph (MOS), that has been proposed for the E-ELT for the statistical study of the formation process of distant galaxies. The concept of Eagle is to cover a 7 arcmin diameter FoV and features 20 MOAO spectroscopic channels, working in parallel, and delivering a corrected wave-front for achieving an ensquared energy (EE) greater than 30% in a resolution element of 75 mas.…”

Section: Introductionmentioning

confidence: 99%

Wave-front error breakdown in laser guide star multi-object adaptive optics validated on-sky by Canary

Martin

Gendron

Rousset

et al. 2017

A&A

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Context. Canary is the multi-object adaptive optics (MOAO) on-sky pathfinder developed in the perspective of multi-object spectrograph on extremely large telescopes (ELTs). In 2013, Canary was operated on-sky at the William Herschel telescope (WHT), using three off-axis natural guide stars (NGS) and four off-axis Rayleigh laser guide stars (LGS), in open-loop, with the on-axis compensated turbulence observed with a H-band imaging camera and a Truth wave-front sensor (TS) for diagnostic purposes. Aims. Our purpose is to establish a reliable and accurate wave-front error breakdown for LGS MOAO. This will enable a comprehensive analysis of Canary on-sky results and provide tools for validating simulations of MOAO systems for ELTs. Methods. To evaluate the MOAO performance, we compared the Canary on-sky results running in MOAO, in single conjugated adaptive optics (SCAO) and in ground layer adaptive optics (GLAO) modes, over a large set of data acquired in 2013. We provide a statistical study of the seeing. We also evaluated the wave-front error breakdown from both analytic computations, one based on a MOAO system modelling and the other on the measurements from the Canary TS. We have focussed especially on the tomographic error and we detail its vertical error decomposition. Results. We show that Canary obtained 30.1%, 21.4% and 17.1% H-band Strehl ratios in SCAO, MOAO and GLAO respectively, for median seeing conditions with 0.66 of total seeing including 0.59 at the ground. Moreover, we get 99% of correlation over 4500 samples, for any AO modes, between two analytic computations of residual phase variance. Based on these variances, we obtain a reasonable Strehl-ratio (SR) estimation when compared to the measured IR image SR. We evaluate the gain in compensation for the altitude turbulence brought by MOAO when compared to GLAO.

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Section: Introductionmentioning

confidence: 99%

Wave-front error breakdown in laser guide star multi-object adaptive optics validated on-sky by Canary

Martin

Gendron

Rousset

et al. 2017

A&A

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“…Three different concepts for MOS spectrographs, each tailored to different scientific cases, we presented during the E-ELT Phase A design studies (see LeFevre et al 13 , Hammer et al 14 , Cuby et al 15 ,). The concepts range from a lowresolution imaging spectrometer (OPTIMOS DIORAMAS 13 ) to a high resolution fibre-fed optical-H-band spectrograph (OPTIMOS-EVE 14 ) and included a multi-field AO corrected IFU spectrograph (EAGLE 15 ).…”

Section: Elt-mosmentioning

confidence: 99%

“…The concepts range from a lowresolution imaging spectrometer (OPTIMOS DIORAMAS 13 ) to a high resolution fibre-fed optical-H-band spectrograph (OPTIMOS-EVE 14 ) and included a multi-field AO corrected IFU spectrograph (EAGLE 15 ). The main requirements on the future ELT-MOS are now • 0.4-2.45um wavelength range • 1 000 < R< 15 000…”

Section: Elt-mosmentioning

confidence: 99%

The E-ELT instrument roadmap: a status report

Ramsay¹,

Casali²,

González³

et al. 2014

SPIE Proceedings

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We present the status of the instrumentation programme for the European Extremely Large Telescope. The instrumentation planning is governed by the E-ELT Instrument Roadmap, which synthesises the scientific, technical and managerial influences on the instrument programme into a staged development plan. Preparations for the start of the design and build phases of the first light instruments and their adaptive optics systems are well underway and are summarised here. In parallel, the process for development of the next three instruments has begun. Recent work on the instrument interface to the telescope is described.

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“…EAGLE is an instrument under consideration for the European Extremely Large Telescope (E-ELT) 1 . The instrument is intended to be a workhorse multi-object spectrograph operating in the optimal wavelength range of the telescope and its adaptive optics systems.…”

Section: The Eagle Instrumentmentioning

confidence: 99%

A mechanical design concept for EAGLE on the revised E-ELT

Dubbeldam

2014

SPIE Proceedings

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ESO have recently revisited the design of the E-ELT with a view to reducing cost, leading to de-scopes which include a smaller primary aperture and removal of the Gravity Invariant Focal Station (GIFS). In its original concept, the EAGLE instrument was designed to be located at the GIFS and consequently a major mechanical re-design was required to enable the instrument to be placed on its side in a conventional straight-through Nasmyth configuration. In this paper, a conceptual design for a new instrument structure is presented. A preliminary finite element analysis was carried out to assess the structure's behaviour under operating loading conditions (e.g. gravity loads). The results of this analysis demonstrate that the proposed design is viable, without any significant degradation in performance compared to the original GIFS design.

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EAGLE: a MOAO fed multi-IFU NIR workhorse for E-ELT

Cited by 24 publications

References 0 publications

Wave-front error breakdown in laser guide star multi-object adaptive optics validated on-sky by Canary

Wave-front error breakdown in laser guide star multi-object adaptive optics validated on-sky by Canary

The E-ELT instrument roadmap: a status report

A mechanical design concept for EAGLE on the revised E-ELT

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