Journal of Geophysical Research: Solid Earth, 2018 The celestial sources observed by geodetic very‐long‐baseline interferometry (VLBI), most of which are quasars, are resolved—they have a finite angular size as measured by the interferometer—yet modern geodetic VLBI analysis techniques still treat these ...
Ming Hui Xu, James M Anderson
exaly +2 more sources
Constraints on the Persistent Radio Source Associated with FRB 20190520B Using the European VLBI Network [PDF]
Astrophysical Journal Letters, 2023 We present very long baseline interferometry (VLBI) observations of a continuum radio source potentially associated with the fast radio burst source FRB 20190520B.
S. Bhandari +9 more
semanticscholar +1 more source
CASA on the Fringe—Development of VLBI Processing Capabilities for CASA [PDF]
Publications of the Astronomical Society of the Pacific, 2022 New functionality to process Very Long Baseline Interferometry (VLBI) data has been implemented in the CASA package. This includes two new tasks to handle fringe fitting and VLBI-specific amplitude calibration steps.
I. van Bemmel +16 more
semanticscholar +1 more source
Evaluation of New Submillimeter VLBI Sites for the Event Horizon Telescope [PDF]
Astrophysical Journal Supplement Series, 2021 The Event Horizon Telescope (EHT) is a very long-baseline interferometer built to image supermassive black holes on event-horizon scales. In this paper, we investigate candidate sites for an expanded EHT array with improved imaging capabilities.
A. Raymond +10 more
semanticscholar +1 more source
VLBI celestial and terrestrial reference frames VIE2022b [PDF]
Astronomy & Astrophysics, 2022 Context: We introduce the computation of global reference frames from Very Long Baseline Interferometry (VLBI) observations at the Vienna International VLBI Service for Geodesy and Astrometry (IVS) Analysis Center (VIE) in detail.
H. Kr'asn'a +11 more
semanticscholar +1 more source
Probing the Innermost Regions of AGN Jets and Their Magnetic Fields with RadioAstron. V. Space and Ground Millimeter-VLBI Imaging of OJ 287 [PDF]
Astrophysical Journal, 2021 We present the first polarimetric space very long baseline interferometry (VLBI) observations of OJ 287, observed with RadioAstron at 22 GHz during a perigee session on 2014 April 4 and five near-in-time snapshots, together with contemporaneous ground ...
J. Gómez +29 more
semanticscholar +1 more source
East Asian VLBI Network observations of active galactic nuclei jets: imaging with KaVA+Tianma+Nanshan [PDF]
Research in Astronomy and Astrophysics, 2021 The East Asian Very Long Baseline Interferometry (VLBI) Network (EAVN) is a rapidly evolving international VLBI array that is currently promoted under joint efforts among China, Japan and Korea.
Yu-Zhu Cui +76 more
semanticscholar +1 more source
Evidence of the Gaia–VLBI position differences being related to radio source structure [PDF]
Astronomy & Astrophysics, 2021 Context. We report the relationship between the Gaia–VLBI position differences and the magnitudes of source structure effects in VLBI observations. Aims.
Minghui Xu +5 more
semanticscholar +1 more source
Using space-VLBI to probe gravity around Sgr A* [PDF]
Astronomy & Astrophysics, 2021 Context. The Event Horizon Telescope (EHT) will soon provide the first high-resolution images of the Galactic Centre supermassive black hole candidate Sagittarius A* (Sgr A*), enabling us to probe gravity in the strong-field regime.
C. Fromm +8 more
semanticscholar +1 more source
VLBI Type Experimental Observation of GPS [PDF]
Journal of Astronomy and Space Sciences, 2010 As a preparatory study for Global Positioning System-Very Long Baseline Interferometry (GPS-VLBI) hybrid system, we examined if VLBI type observation of the GPS signal is realizable through a test experiment.
Younghee Kwak +6 more
doaj +1 more source