Automated morphometry with SExtractor and PSFEx.

Bertin, Emmanuel

Variable blurring of astronomical images by seeing and the instrumental Point Spread Function (PSF) makes it challenging to obtain accurate photometric and morphometric measurements under changing observing conditions. I will show how the new PSFEx PSF modelling software and the latest version of SExtractor can be combined to perform fully automated, PSF-corrected source measurements. An implementation of these techniques in the Dark Energy Survey Data Management (DESDM) pipeline will be presented.

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