A differential method of maximum entropy

Details A differential method of maximum entropy A differential method of maximum entropy

2002-04-19

arxiv.org/abs/astro-ph/0204340v1

Radiophysics and Quantum Electronics 41 (1998) 669-673

Astronomy and Astrophysics

Astrophysics

Latex, 6 pages with 4 Postscript figures

Scientific paper

We consider a differential method of maximum entropy that is based on the linearity of Fourier transform and involves reconstruction of images from the differences of the visibility function. The efficiency of the method is demonstrated with respect to the recovery of source images with bright components against the background of a sufficiently weak extended base. The simulation results are given along with the maps of an extragalactic radio source 0059+581, which were obtained using the standard and differential methods of maximum entropy for three observation dates and show that the principle of differential mapping allows us to increase considerably the dynamic interval of images.

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