Project overview of OPTIMOS-EVE: the fibre-fed multi-object spectrograph for the E-ELT

Navarro, Ramón; Chemla, Fanny; Bonifacio, P.; Flores, H.; Guinouard, Isabelle; Huet, Jean-Michel; Puech, M.; Royer, F.; Pragt, J.; Wulterkens, Gerben; Sawyer, Eric; Caldwell, M.; Tosh, Ian; Whalley, Martin S.; Woodhouse, Guy F.W.; Spanó, P.; Marcantonio, P. Di; Andersen, M. I.; Dalton, Gavin; Kaper, L.; Hammer, F.

doi:10.1117/12.857638

Cited by 14 publications

(9 citation statements)

References 2 publications

(2 reference statements)

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“…Other sky subtraction methods, such as the λ − λ reconstruction method [5] and a details study of the accuracy of the method as a function of the number of dedicated sky fibers are also under investigation. This study have been carry out in the framework of the design of MOONS/VLT [9] and OPTIMOS-EVE/E-ELT [9,10] -two projects of multi-object spectrographs in the optical-to-nearIR domain based on fiber technology.…”

Section: Resultsmentioning

confidence: 99%

On-sky tests of sky-subtraction methods for fiber-fed spectrographs

Rodrigues¹,

Cirasuolo²,

Hammer³

et al. 2012

SPIE Proceedings

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We present preliminary results on on-sky test of sky subtraction methods for fiber-fed spectrograph. Using dedicated observation with FLAMES/VLT in I-band, we have tested the accuracy of the sky subtraction for 4 sky subtraction methods: mean sky, closest sky, dual stare and cross-beam switching. The cross beam-switching and dual stare method reach accuracy and precision of the sky subtraction under 1%. In contrast to the commonly held view in the literature, this result points out that fiber-fed spectrographs are adapted for the observations of faint targets.

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Section: Resultsmentioning

confidence: 99%

On-sky tests of sky-subtraction methods for fiber-fed spectrographs

Rodrigues¹,

Cirasuolo²,

Hammer³

et al. 2012

SPIE Proceedings

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“…OPTIMOS-EVE (PI Hammer [12]) is a fibre based optical to NIR H-band (0.37-1.7μm) multi-object spectrometer designed for operation in 'seeing limited' conditions, with the telescope NGS or LGS GLAO systems in operation. The instrument exploits the maximum field offered by the E-ELT, which is 10arcmin in diameter, though the field beyond 5armin diameter suffers from vignetting due to the telescope NGS guide probes.…”

Section: Optimos-eve -A Fibre Based Mos Spectrometermentioning

confidence: 99%

An overview of the E-ELT instrumentation programme

Ramsay¹,

D’Odorico²,

Casali³

et al. 2010

SPIE Proceedings

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In this paper we present a brief status report on the conceptual designs of the instruments and adaptive optics modules that have been studied for the European Extremely Large Telescope (E-ELT). In parallel with the design study for the 42-m telescope, ESO launched 8 studies devoted to the proposed instruments and 2 for post-focal adaptive optics systems. The studies were carried out in consortia of ESO member state institutes or, in two cases, by ESO in collaboration with external institutes. All studies have now been successfully completed. The result is a powerful set of facility instruments which promise to deliver the scientific goals of the telescope.The aims of the individual studies were broad: to explore the scientific capabilities required to meet the E-ELT science goals, to examine the technical feasibility of the instrument, to understand the requirements placed on the telescope design and to develop a delivery plan. From the perspective of the observatory, these are key inputs to the development of the proposal for the first generation E-ELT instrument suite along with the highest priority science goals and budgetary and technical constraints. We discuss the lessons learned and some of the key results of the process.

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“…The required resolution should be much better than atmospherical seeing, typically 50 to 100 milli-arcseconds, and therefore requires the implementation of adaptive optics (AO), an instrumental technique for the compensation of dynamically evolving aberrations in an optical system (i.e., due to atmospheric turbulence in the case of a ground based telescope). One of the instruments proposed for the future European Extremely Large Telescope (E-ELT) is MOSAIC [8], a multi-object integral field (multi-IFU) spectrograph for the analysis of distant galaxies, a merger of the EAGLE and OPTIMOS-EVE phase A projects [5,15]. It must be equipped with a specific AO concept, called multi-object AO (MOAO).…”

Section: Introductionmentioning

confidence: 99%

High Performance Pseudo-analytical Simulation of Multi-Object Adaptive Optics over Multi-GPU Systems

Abdelfattah

Gendron

Gratadour

et al. 2014

Lecture Notes in Computer Science

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Multi-object adaptive optics (MOAO) is a novel adaptive optics (AO) technique dedicated to the special case of wide-field multiobject spectrographs (MOS). It applies dedicated wavefront corrections to numerous independent tiny patches spread over a large field of view (FOV). The control of each deformable mirror (DM) is done individually using a tomographic reconstruction of the phase based on measurements from a number of wavefront sensors (WFS) pointing at natural and artificial guide stars in the field. The output of this study helps the design of a new instrument called MOSAIC, a multi-object spectrograph proposed for the European Extremely Large Telescope (E-ELT) 1 . We have developed a novel hybrid pseudo-analytical simulation scheme that allows us to accurately simulate in detail the tomographic problem. The main challenge resides in the computation of the tomographic reconstructor, which involves pseudo-inversion of a large dense symmetric matrix. The pseudo-inverse is computed using an eigenvalue decomposition, based on the divide and conquer algorithm, on multicore systems with multi-GPUs. Thanks to a new symmetric matrix-vector product (SYMV) multi-GPU kernel, our overall implementation scores significant speedups over standard numerical libraries on multicore, like Intel MKL, and up to 60% speedups over the standard MAGMA implementation on 8 Kepler K20c GPUs. At 40,000 unknowns, this appears to be the largest-scale tomographic AO matrix solver submitted to computation, to date, to our knowledge and opens new research directions for extreme scale AO simulations.

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Project overview of OPTIMOS-EVE: the fibre-fed multi-object spectrograph for the E-ELT

Cited by 14 publications

References 2 publications

On-sky tests of sky-subtraction methods for fiber-fed spectrographs

On-sky tests of sky-subtraction methods for fiber-fed spectrographs

An overview of the E-ELT instrumentation programme

High Performance Pseudo-analytical Simulation of Multi-Object Adaptive Optics over Multi-GPU Systems

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