PRECL: A new method for interferometry imaging from closure phase

Abstract

For short-wavelength VLBI observations, it is difficult to measure the phase of the visibility function accurately. The closure phases are reliable measurements under this situation, though it is not sufficient to retrieve all of the phase information. We propose a new method, Phase Retrieval from Closure Phase (PRECL). PRECL estimates all the visibility phases only from the closure phases. Combining PRECL with a sparse modeling method we have already proposed, imaging process of VLBI does not rely on dirty image nor self-calibration. The proposed method is tested numerically and the results are promising.

9 pages, 4 figures, accepted for publication in PASJ

References in corpus (5)

• Event-horizon-scale structure in the supermassive black hole candidate at the Galactic Centre
• Jet Launching Structure Resolved Near the Supermassive Black Hole in M87
• 230 GHz VLBI observations of M87: event-horizon-scale structure at the enhanced very-high-energy $\gamma$-ray state in 2012
• Imaging the Supermassive Black Hole Shadow and Jet Base of M87 with the Event Horizon Telescope
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• Capabilities and prospects of the East Asia Very Long Baseline Interferometry Network
• Variational Image Feature Extraction for the Event Horizon Telescope
• Global Mapping of an Exo-Earth using Sparse Modeling
• Super-resolution Imaging of the Protoplanetary Disk HD 142527 Using Sparse Modeling
• Dynamic and polarimetric VLBI imaging with a multiscalar approach
• Search for Alignment of Disk Orientations in Nearby Star-Forming Regions: Lupus, Taurus, Upper Scorpius, $\rho$ Ophiuchi, and Orion
• Accelerating cross-validation with total variation and its application to super-resolution imaging
• Granger Causality for Compressively Sensed Sparse Signals
• DoG-HiT: A novel VLBI Multiscale Imaging Approach
• Very-Long Baseline Interferometry Imaging with Closure Invariants using Conditional Image Diffusion