High resolution spectrograph for the 4MOST facility

Mignot, Shan; Amans, Jean-Philippe; Cohen, Mathieu; Horville, D.; Jagourel, Pascal

doi:10.1117/12.925958

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…The predicted performance of the HRS is shown in Figure 14. More details about the HRS can be found elsewhere in these proceedings from Mignot et al [13] . Figure 14: The predicted throughput of the blue (left) and the red (right) channel of the high resolution spectrograph.…”

Section: High Resolution Spectrographsmentioning

confidence: 99%

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4MOST: 4-metre multi-object spectroscopic telescope

Jong¹,

et al. 2012

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The 4MOST consortium is currently halfway through a Conceptual Design study for ESO with the aim to develop a wide-field (>3 square degree, goal >5 square degree), high-multiplex (>1500 fibres, goal 3000 fibres) spectroscopic survey facility for an ESO 4m-class telescope (VISTA). 4MOST will run permanently on the telescope to perform a 5 year public survey yielding more than 20 million spectra at resolution R∼5000 (λ=390-1000 nm) and more than 2 million spectra at R~20,000 (395-456.5 nm & 587-673 nm). The 4MOST design is especially intended to complement three key all-sky, space-based observatories of prime European interest: Gaia, eROSITA and Euclid. Initial design and performance estimates for the wide-field corrector concepts are presented. Two fibre positioner concepts are being considered for 4MOST. The first one is a Phi-Theta system similar to ones used on existing and planned facilities. The second one is a new R-Theta concept with large patrol area. Both positioner concepts effectively address the issues of fibre focus and pupil pointing. The 4MOST spectrographs are fixed configuration two-arm spectrographs, with dedicated spectrographs for the high-and low-resolution fibres. A full facility simulator is being developed to guide trade-off decisions regarding the optimal field-of-view, number of fibres needed, and the relative fraction of high-to-low resolution fibres. The simulator takes mock catalogues with template spectra from Design Reference Surveys as starting point, calculates the output spectra based on a throughput simulator, assigns targets to fibres based on the capabilities of the fibre positioner designs, and calculates the required survey time by tiling the fields on the sky. The 4MOST consortium aims to deliver the full 4MOST facility by the end of 2018 and start delivering high-level data products for both consortium and ESO community targets a year later with yearly increments.

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Section: High Resolution Spectrographsmentioning

confidence: 99%

“…The predicted performance of the HRS is shown in Figure 14. More details about the HRS can be found elsewhere in these proceedings from Mignot et al [13] .…”

Section: High Resolution Spectrographsmentioning

confidence: 99%

4MOST: 4-metre multi-object spectroscopic telescope

Jong¹,

et al. 2012

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The 4MOST instrument concept overview

Haynes

Barden

Jong³

et al. 2014

SPIE Proceedings

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High-resolution and highly-multiplexed option for fiber-fed spectrograph of the wide field MUltiplexed Survey Telescope (MUST)

Li,

Wang,

Huang

et al. 2024

Opt. Express

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In recent decades, rapid advances in astronomical imaging campaigns have generated an urgent need for detailed spectroscopic surveys with increased speed and efficiency. The 6.5 m MUltiplexed Survey Telescope (MUST) aims to address these current demands. The performance of the multi-object fiber-fed spectrograph (MOFS) plays a critical role for spectroscopic survey telescopes, directly influencing the realization of scientific aims. In this paper, we demonstrate a high-resolution and highly-multiplexed option for MOFS of MUST. The system is believed to be first to apply a 92 mm × 92 mm large-size detector in a Schmidt-like camera and reduces the average central obscuration to 14%. Thanks to the F/1.25 camera design with excellent image quality, the spectrograph achieves up to 800 150µm-large-core optical fibers integration. It can obtain the broadband spectral information (395 nm–435 nm, 520 nm–570 nm, 610 nm–680 nm) of 800 objects with a high resolution of >16,000 within one exposure. The spectrograph theory, design method, and final system scheme of the MOFS can offer good reference and guidance for the spectrograph design in the spectroscopic survey.

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High resolution spectrograph for the 4MOST facility

Cited by 3 publications

References 6 publications

4MOST: 4-metre multi-object spectroscopic telescope

4MOST: 4-metre multi-object spectroscopic telescope

The 4MOST instrument concept overview

High-resolution and highly-multiplexed option for fiber-fed spectrograph of the wide field MUltiplexed Survey Telescope (MUST)

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