Adaptive Optics Sky Coverage for Dome C Telescopes

Details Adaptive Optics Sky Coverage for Dome C Telescopes Adaptive Optics Sky Coverage for Dome C Telescopes

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pasp..120.1119l&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 120, Issue 872, pp. 1119-1127.

Astronomy and Astrophysics

Astronomy

2

Astronomical Instrumentation

Scientific paper

The unique atmospheric characteristics found at Dome C on the Antarctic plateau offer significant advantages for the operation of adaptive optics systems. An analysis is presented here comparing the performance of adaptive optics systems on telescopes located at Dome C with similar systems located at a mid-latitude site. The large coherence length, wide isoplanatic angle, and long coherence time of the Dome C atmosphere allow an adaptive optics system located there to correct to high order, observe over wide fields and use faint guide stars, resulting in a lower total wavefront error and a significant increase in sky coverage factor than can be achieved at a typical mid-latitude site. While the same performance could in principle be achievable at mid-latitude sites, this would only occur under exceptionally stable atmospheric conditions that are likely to occur on only a few nights per year.

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