Performance of the Canada-France-Hawaii Telescope Adaptive Optics Bonnette

Details Performance of the Canada-France-Hawaii Telescope Adaptive Optics Bonnette Performance of the Canada-France-Hawaii Telescope Adaptive Optics Bonnette

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998pasp..110..152r&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 110, Issue 744, pp. 152-164.

Physics

Optics

123

Telescopes: Optics, Atmospheric Effects

Scientific paper

Extensive results from the commissioning phase of PUEO, the adaptive optics instrument adaptor for the Canada-France-Hawaii Telescope (CFHT), are presented and discussed. Analyses of more than 750 images recorded with a CCD and a near-IR camera on 16 nights in wavelengths from B to H are used to derive the properties of the compensated wavefront and images in a variety of conditions. The performance characteristics of the system are analyzed and presented in several ways, in terms of delivered Strehl ratios, full width half-maxima (FWHM), and quantities describing the improvements of both. A qualitative description is given of how the properties of the corrected images result from the structure function of the compensated phase. Under median seeing conditions, PUEO delivers essentially diffraction-limited images at H and K and images with FWHM ~ 0.1" at J and I, and provides significant gains down to B, with guide stars as faint as R=14. During good conditions, substantial gains were realized with guide stars as faint as R=17. A simple user interface and software that automatically and continuously optimizes the mode gains during observations makes the operational efficiency extremely high. A few astronomical examples are briefly discussed.

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