Abstract
Lucky Imaging improves the angular resolution of astronomical observations hampered by atmospheric turbulence (“seeing”). Unlike adaptive optics, Lucky Imaging is a passive observing technique with individual integration times comparable to the atmospheric coherence time. Thanks to the advent of essentially noise free “Electron multiplying CCD” detectors, Lucky Imaging saw a renewed interest in the past decade. It is now routinely used at a number of 2–5-m class telescopes, such as ESO’s NTT. We review the history of Lucky Imaging, present the technical implementation, describe the data analysis philosophy, and show some recent results obtained with this technique. We also discuss the advantages and limitations of Lucky Imaging compared to other passive and active high angular resolution observing techniques.
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