An efficient PSF construction method

Details An efficient PSF construction method An efficient PSF construction method

2007-03-05

arxiv.org/abs/astro-ph/0703071v1

Mon.Not.Roy.Astron.Soc.377:1337-1342,2007

Astronomy and Astrophysics

Astrophysics

The paper contains 7 figures and 1 table

Scientific paper

10.1111/j.1365-2966.2007.11693.x

Image computation is a fundamental tool for performance assessment of astronomical instrumentation, usually implemented by Fourier transform techniques. We review the numerical implementation, evaluating a direct implementation of the discrete Fourier transform (DFT) algorithm, compared with fast Fourier transform (FFT) tools. Simulations show that the precision is quite comparable, but in the case investigated the computing performance is considerably higher for DFT than FFT. The application to image simulation for the mission Gaia and for Extremely Large Telescopes is discussed.

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