psftools is a personal library of utility methods to deal with astronomical point spread functions (PSFs).
In particular one finds methods to analyse the characteristics of a PSF such as its encircled energy, azimuthal profiles, ellipticity, etc., and perform classical operations on them such a normalisation, conversion to Fourier domain, convolutions, etc.
The library installs two convenient scripts:
- make_kernel to compute a homogenization kernel from one PSF image to a broader one (not handling actual deconvolution)
- homogenization to apply these kernels on astronomical images to perform PSF matching.
It has been mainly developed during my engineer position at Institut d'Astrophysique Spatiale (2014-2016) and was rejuvenated in May 2023 to deal with current Python standards and prepare its release on GitHub.
pip install git+https://github.com/aboucaud/psf_tools.git
The basic API docs are available here
Some of this work has benefited from daily exchanges with Hervé Dole (IAS), Alain Abergel (IAS) and François Orieux (L2S, Centrale Supélec).
The code is released under the MIT license.