Results 141 to 150 of about 27,573 (245)
Parallaxes and Proper Motions of Long Period Variable Stars Determined from VLBI and Gaia DR3
GalaxiesAnnual parallaxes of Galactic long period variable stars (LPVs) are essential for determining their distances and intrinsic properties, but their measurement remains challenging because of their large stellar sizes, circumstellar matter, and time ...
Akiharu Nakagawa +3 more
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The Astrophysical JournalEarth-based very long baseline interferometry (VLBI) has made rapid advances in imaging black holes. However, due to the limitations imposed on terrestrial VLBI by the Earth’s finite size and turbulent atmosphere, it is imperative to have a space-based ...
Aditya Tamar +2 more
doaj +1 more source
A Simulator to Generate VLBI Baseband Data in Matlab
, 2019 VLBI radio telescopes represent a sophisticated interconnection of electronic devices. The final product of each observation by a radio telescope is the baseband data. In this presentation, we show a software tool as part of the Vienna VLBI and Satellite
Schartner, Matthias +3 more
core +4 more sources
European 4 Gbps VLBI and e-VLBI [PDF]
Proceedings of The 8th International e-VLBI Workshop — PoS(EXPReS09), 2009 Guifré Molera Calvés +3 more
openaire +1 more source
VSOP Space VLBI and Geodetic VLBI Investigations of Southern Hemisphere Radio Sources
The Astrophysical Journal Supplement Series, 2002 Abstract not available.
Tingay, Steven J. +16 more
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Multi-Maser VLBI structure of the high-mass SFR G16.59-0.05 [PDF]
, 2008 In the following we summarize our results based on multi-epoch, phase referenced, Very Long Baseline Interferometry (VLBI) observations of maser associations towards the high-mass Star Forming Region (SFR) G16.59-0.05. We observed H2O 22.2 GHz (4 epochs)
Riccardo Cesaroni +9 more
core +1 more source
Enhanced Stochastic Models for VLBI Invariant Point Estimation and Axis Offset Analysis
Remote SensingThe accuracy and stability of Very Long Baseline Interferometry (VLBI) systems are essential for maintaining global geodetic reference frames such as the International Terrestrial Reference Frame (ITRF). This study focuses on the precise determination of
Chang-Ki Hong, Tae-Suk Bae
doaj +1 more source
Monitoring of multi-frequency polarization of gamma-ray bright AGNs
EPJ Web of Conferences, 2013 We started two observing programs with the Korean VLBI Network (KVN) monitoring changes in the flux density and polarization of relativistic jets in gamma-ray bright AGNs simultaneously at 22, 43, 86, 129 GHz.
Lee Sang-Sung +7 more
doaj +1 more source
e-VLBI Technology in VLBI Network "Quasar" [PDF]
Proceedings of The 8th International e-VLBI Workshop — PoS(EXPReS09), 2009 Alexandre Salnikov +7 more
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, 2008 We review VLBI observations of supernovae over the last quarter century and discuss the prospect of imaging future supernovae with space VLBI in the context of VSOP-2. From thousands of discovered supernovae, most of them at cosmological distances, ~50 have been detected at radio wavelengths, most of them in relatively nearby galaxies. All of the radio
openaire +2 more sources