MEM imaging of multi-wavelength VLBA polarisation observations of Active Galactic Nuclei

Abstract

We have developed a C++ implementation of the Maximum Entropy Method (MEM) suitable for deconvolving VLBI polarisation data. The first results of this implementation are presented and compared with CLEAN-based deconvolutions of the same data. We present Faraday rotation measure and intrinsic polarisation maps of AGN which have been made from MEM deconvolutions of multi-wavelength observations of Stokes parameters I, Q and U. The advantages of using MEM are demonstrated, in particular its enhanced resolution over the CLEAN algorithm.

arXiv commentFrom the proceedings of the 11th European VLBI Network Symposium and Users Meeting, Bordeaux, 9-12 October 2012, 6 pages, 3 figures