GaaP : PSF-and aperture-matched photometry using shapelets

@inproceedings{Kuijken2006GaaPP,
  title={GaaP : PSF-and aperture-matched photometry using shapelets},
  author={K. H. Kuijken},
  year={2006}
}
Aims. We describe a new technique for measuring accurate galaxy co lours from images taken under di fferent seeing conditions. Methods. The method involves two ingredients. First we define the Gaus si n-aperture-and-PSF flux, which is the Gaussian-weighte d flux a galaxy would have if it were observed with a Gaussian PSF. Thi s theoretical aperture flux is independent of the PSF or pixel scale that the galaxy was observed with. Second we develop a procedure to me asure such a ‘GaaP’ flux from… CONTINUE READING
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