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Long-exposure stellar images recorded with large ground-based telescopes areblurred due to the turbulent nature of the atmosphere. The VLT employs activeand adaptive optics (AO) systems to compensate for the deleterious effects ofthe atmosphere in real time. The speckle imaging technique provides analternative way to achieve diffraction-limited imaging by post-processing aseries of short-exposure images. The use of speckle imaging with the no-AO modeof NACO at the VLT is demonstrated. Application of this technique isparticularly suited to the J-band and it provides versatile high angularresolution imaging under mediocre conditions and/or in imaging extendedobjects. The implementation of this mode underlines the continuingattractiveness of NACO at the VLT.

Speckle Imaging with VLT/NACO No-AO Mode