An off-axis telescope concept for Antarctic astronomy

Moretto, Gil; Epchtein, N.; Langlois, M.; Vauglin, I.

doi:10.1117/12.927257

Cited by 3 publications

(1 citation statement)

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“…It is based on an analysis of the latest seeing measurements and focuses on the bimodal characteristics of the DC turbulent atmosphere. The framework is the same as for the telescope project PILOT (Saunders et al 2008a,b), and similar projects (Le Roux et al 2008;Moretto et al 2012;Abe et al 2013). Both a singlereference AO system (hereafter called standard AO) and a groundlayer AO (GLAO) (Shmalhausen & Yaitskova 2000;Rigaut 2003;Tokovinin 2004) system are simulated to take full advantage of the peculiarity of the DC atmosphere.…”

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confidence: 99%

Anisoplanatic error evaluation and wide-field adaptive optics performance at Dome C, Antarctica

Carbillet

Aristidi

Giordano

et al. 2017

Monthly Notices of the Royal Astronomical Society

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The aim of this paper is twofold: (i) to deduce the most representative C 2 N profile(s) for Dome C (DC), Antarctica, from the latest measurements, and (ii) to evaluate the performance of a widefield adaptive optics (AO) system equipping a 2-3 m telescope. Two models of the C 2 N profile, corresponding to the bimodal distribution of seeing (a poor seeing mode and a good seeing mode), are composed from both Single Star Scidar data and balloon radio soundings. The anisoplanatic error is first evaluated for a standard AO system from Monte Carlo simulations. DC is shown to outperform Mauna Kea for both seeing modes. A simple ground-layer AO (GLAO) system is then considered. This provides an anisoplanatic error of less than 150 nm over a field of 30 arcmin for the good seeing mode, corresponding to a basic performance Strehl ratio (considering also the fitting and the servo-lag errors) of more than ∼80 per cent in K and ∼50 per cent in J. The poor seeing model shows performance comparable to the Mauna Kea model. We also studied the influence of telescope elevation, showing that a telescope at 40 m would perform, in the poor seeing mode, like a telescope observing 8 m above the ground in the good seeing mode. Finally, we show that while tip-tilt-only correction permits high levels of correction in the good seeing mode at 40 m, it is not as efficient as the GLAO system, even at an altitude of 8 m, and it is not sufficient for high levels of correction for poor seeing, even at a height of 40 m.

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confidence: 99%

Anisoplanatic error evaluation and wide-field adaptive optics performance at Dome C, Antarctica

Carbillet

Aristidi

Giordano

et al. 2017

Monthly Notices of the Royal Astronomical Society

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Kunlun Dark Universe Survey Telescope

et al. 2014

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Reviewing off-axis telescope concepts: a quest for highest possible dynamic range for photometry and angular resolution

2012

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We review off-axis telescope concepts that use unobstructed pupils. Built and prospective telescopes for ground and space astronomy will be presented and discussed. Such concepts offer great advantages in terms of emissivity, throughput, diffraction-limited energy concentration and higher dynamic range. The coronagraphic performance of off-axis telescopes will enable instruments, which are starving for higher dynamic range, for example, those devoted to faint companion detection and solar studies. Smaller telescopes like SOLAR-C (IfA/Haleakala Observatory), and the New Solar Telescope (NST/NJIT/ Big Bear Observatory) are operational and are test beds for the Advanced Technology Solar Telescope (ATST Project) for which site construction is beginning on Haleakala.

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An off-axis telescope concept for Antarctic astronomy

Cited by 3 publications

References 9 publications

Anisoplanatic error evaluation and wide-field adaptive optics performance at Dome C, Antarctica

Anisoplanatic error evaluation and wide-field adaptive optics performance at Dome C, Antarctica

Kunlun Dark Universe Survey Telescope

Reviewing off-axis telescope concepts: a quest for highest possible dynamic range for photometry and angular resolution

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