Astronomical extended object image reconstruction after primarycorrection with Yunnan Observatory 1.2m adaptive optics system

摘要

As an astronomical image post-processing technique, deconvolution from wavefront sensing (DWFS) is a powerful andlow cost method for adaptive optics (AO) images reduction. It is based on deconvolution of short exposure images andsimultaneous measuring wavefront sensor data, both are provided by adaptive optics system to improve the quality ofimages. However, for extended or dim sources observing, limited precision of the Wave Front Sensor (WFS) will lead toinferior correction quality of AO images, also these can hardly enhanced by DWFS method. We show here a simple andefficient solution, which combines the DWFS method with a shift-and-add (SAA) image reconstruction technique,designed for reduction of astronomical data obtained with AO system, especially extended objects. This scheme has beenapplied to the upgraded 61-actuator Shack-Hartmann based adaptive optics system, partially primary corrected extendedobject images at Yunnan observatory 1.2m telescope for astronomical high resolution imaging. Experimental result ofMars was presented.