Gemini North Laser Adaptive Optics Performance from First Science Data

Details Gemini North Laser Adaptive Optics Performance from First Science Data Gemini North Laser Adaptive Optics Performance from First Science Data

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...21011702t&link_type=abstract

American Astronomical Society Meeting 210, #117.02; Bulletin of the American Astronomical Society, Vol. 39, p.242

Physics

Optics

Scientific paper

Commissioning was completed in February 2007 for the Gemini North Laser Guide Star Adaptive Optics system, Altair/LGS. Altair/LGS allows the correction of high-order atmospheric aberrations at rates up to 1000 Hz. A natural guide star is still required to correct tip, tilt and focus, but flux requirements are factor of 40 more lenient than with a traditional Natural Guide Star system, and image quality is more uniform over the field of view. These factors allow a significant increase in sky area available for AO correction with Altair/LGS, averaging 100% within 20 degrees of the galactic plane to 25% at the galactic pole.
System Verification (SV) and Queue data have been collected with Altair/LGS feeding both NIRI (near-infrared imaging and spectroscopy) and NIFS (near-infrared integrated field unit spectroscopy) for both point sources and extended targets. We will present examples of targets where Altair/LGS is most useful, as well as performance data such as signal-to-noise ratio increase, Strehl ratio and angular resolution as measured from on-sky science data. We will also discuss how the LGS system has been merged into routine Gemini Queue operations as well as basic information that users must consider when applying to use Altair/LGS with NIRI or NIFS at Gemini North.

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