Estimation of a super-resolved PSF for the data reduction of undersampled stellar observations
L. Pinheiro da Silva, M. Auvergne, D. Toublanc, Jason F. Rowe, R. Kuschnig, Jaymie M. Matthews · Astronomy and Astrophysics · 2006
Context.Fitting photometry algorithms can be very effective provided that an accurate model of the instrumental point spread function (PSF) is available. When high-precision time-resolved photometry is required, however, the use of point-source star images as empirical PSF models can be unsatisfactory, due to the limits in their spatial resolution. Theoretically-derived models, on the other hand, are limited by the unavoidable assumption of simplifying hypothesis, while the use of analytical approximations is restricted to regularly-shaped PSFs.