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First Very Long Baseline Interferometry Fringe Detection at 690GHz
Ming-Tang Chen, Geoffrey B. Crew, Dan Bintley +42
We report the first very long baseline interferometry (VLBI) experiment conducted in the 690 GHz atmospheric window. On 2024 November 21, observations with the Atacama Large Millim…
Multiobjective optimization for scattering mitigation and scattering screen reconstruction in VLBI observations of the Galactic Center
Alejandro Mus, Teresa Toscano, Hendrik Müller +3
Imaging reconstruction of interferometric data is a hard ill-posed inverse problem. Its difficulty is increased when observing the Galactic Center, which is obscured by a scatterin…
A Novel Calibration and Imaging Method for ALMA Observations of SgrA*
Ezequiel Albentosa-Ruiz, Iván Martí-Vidal, Ciriaco Goddi +1
This document presents a novel method for the intra-field calibration and imaging of the radio source SgrA*, observed with the Atacama Large Millimeter/submillimeter Array (ALMA).…
First Very Long Baseline Interferometry Detections at 870μm
Alexander W. Raymond, Sheperd S. Doeleman, Keiichi Asada +276
The first very long baseline interferometry (VLBI) detections at 870m wavelength (345GHz frequency) are reported, achieving the highest diffraction-limited angular resolutio…
Metadata for the Flux Density Calibration of the April 2018 Event Horizon Telescope Data
J. Y. Koay, C. Romero-Cañizales, L. D. Matthews +29
The Event Horizon Telescope (EHT) observations carried out in 2018 April at 1.3 mm wavelengths included 9 stations in the array, comprising 7 single-dish telescopes and 2 phased ar…
A Characterization of the ALMA Phasing System at 345 GHz
G. B. Crew, C. Goddi, L. D. Matthews +3
The development of the Atacama Large Millimeter/submillimeter Array (ALMA) phasing system (APS) has allowed ALMA to function as an extraordinarily sensitive station for very long b…