45 citations · 153 across the 10 of their papers we have counts for
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Imaging VLBI polarimetry data from Active Galactic Nuclei using the Maximum Entropy Method
Colm P. Coughlan, Denise C. Gabuzda
Mapping the relativistic jets emanating from AGN requires the use of a deconvolution algorithm to account for the effects of missing baseline spacings. The CLEAN algorithm is the m…
Investigating the effects of finite resolution on observed transverse Rotation Measure distributions
Eoin Murphy, Colm Coughlan, Denise Gabuzda
Both the emission properties and evolution of Active Galactic Nuclei (AGN) radio jets are dependent on the magnetic (B) fields that thread them. Faraday Rotation measurements are a…
Describing the Uncertainties in VLBI Images
Colm P. Coughlan, Denise C. Gabuzda
We are investigating a new approach to modelling uncertainties in individual pixels of Very Long Baseline Interferometry (VLBI) intensity (Stokes I, Q, U) images. Comparison of dis…
MEM imaging of multi-wavelength VLBA polarisation observations of Active Galactic Nuclei
Colm P. Coughlan, Denise C. Gabzuda
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…
Connecting Magnetic Towers with Faraday Rotation Gradients in Active Galactic Nuclei Jets
Mehreen Mahmud, Colm P. Coughlan, Eoin Murphy +2
The idea that systematic Faraday Rotation gradients across the parsec-scale jets of AGNs can reveal the presence of helical magnetic (B) fields has been around since the early 1990…