ASCL.net

Astrophysics Source Code Library

Making codes discoverable since 1999

ASCL Code Record

[ascl:1203.008] MegaLUT: Correcting ellipticity measurements of galaxies

MegaLUT is a simple and fast method to correct ellipticity measurements of galaxies from the distortion by the instrumental and atmospheric point spread function (PSF), in view of weak lensing shear measurements. The method performs a classification of galaxies and associated PSFs according to measured shape parameters, and builds a lookup table of ellipticity corrections by supervised learning. This new method has been applied to the GREAT10 image analysis challenge, and demonstrates a refined solution that obtains the highly competitive quality factor of Q = 142, without any power spectrum denoising or training. Of particular interest is the efficiency of the method, with a processing time below 3 ms per galaxy on an ordinary CPU.

Code site:
https://www.epfl.ch/labs/lastro/scientific-activities/cosmograil/software/megalut/
Described in:
https://ui.adsabs.harvard.edu/abs/2012A%26A...544A...8T
Bibcode:
2012ascl.soft03008T

Views: 4283

ascl:1203.008
Add this shield to your page
Copy the above HTML to add this shield to your code's website.