Multifrequency Method for Mapping Active Galactic Nuclei with Allowance for the Frequency-Dependent Image Shift

Abstract

We consider the problem of multifrequency VLBA image synthesis and spectral-index mapping for active galactic nuclei related to the necessity of taking into account the frequency-dependent image shift. We describe our generalized multifrequency synthesis algorithm with a spectral correction based on the maximum entropy method. The results of our processing of multifrequency VLBI data for the radio sources J2202+4216, J0336+3218, and J1419+5423 are presented.

12 pages, 2 tables, 6 figures

References in corpus (3)

• Opacity in compact extragalactic radio sources and its effect on astrophysical and astrometric studies
• A Global 86GHz VLBI Survey of Compact Radio Sources
• Aligning VLBI Images of Active Galactic Nuclei at Different Frequencies