A D-term Modeling Code (DMC) for simultaneous calibration and full-Stokes imaging of very long baseline interferometric data

Abstract

In this paper we present DMC, a model and associated tool for polarimetric imaging of very long baseline interferometry datasets that simultaneously reconstructs the full-Stokes emission structure along with the station-based gain and leakage calibration terms. DMC formulates the imaging problem in terms of posterior exploration, which is achieved using Hamiltonian Monte Carlo sampling. The resulting posterior distribution provides a natural quantification of uncertainty in both the image structure and in the data calibration. We run DMC on both synthetic and real datasets, the results of which demonstrate its ability to accurately recover both the image structure and calibration quantities as well as to assess their corresponding uncertainties. The framework underpinning DMC is flexible, and its specific implementation is under continued development.

16 pages, 10 figures, accepted for publication in ApJ

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• First Sagittarius A* Event Horizon Telescope Results. III: Imaging of the Galactic Center Supermassive Black Hole
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• Key Science Goals for the Next-Generation Event Horizon Telescope
• First M87 Event Horizon Telescope Results. IX. Detection of Near-horizon Circular Polarization
• Reference Array and Design Consideration for the next-generation Event Horizon Telescope
• The Photon Ring in M87*
• Resolving the inner parsec of the blazar J1924-2914 with the Event Horizon Telescope
• Multi-frequency Black Hole Imaging for the Next-Generation Event Horizon Telescope
• The Event Horizon Telescope Image of the Quasar NRAO 530
• MeqSilhouette v2: Spectrally-resolved polarimetric synthetic data generation for the Event Horizon Telescope
• Polarization Observations of AGN Jets: Past and Future
• Deep learning inference with the Event Horizon Telescope II. The Zingularity framework for Bayesian artificial neural networks
• Prospects of using closure traces directly for imaging in Very Long Baseline Interferometry
• Robust analysis of differential Faraday Rotation based on interferometric closure observables
• GALLIFRAY -- A geometric modeling and parameter estimation framework for black hole images using bayesian techniques
• New Views of Black Holes from Computational Imaging
• A revised view of the linear polarization in the subparsec core of M87 at 7 mm