Results 101 to 110 of about 9,059 (229)
AUA047: Students at TU Wien Organize Their own VLBI Session [PDF]
, 2019 At Technische Universit¨at Wien (TU Wien) students had the chance to fully organize the official IVS session AUA047. We will give an overview of the individual parts of this course, including, scheduling, large-scale Monte Carlo simulations, an ...
Hankey, Warren +6 more
core
Extragalactic VLBI at 89 GHZ [PDF]
Symposium - International Astronomical Union, 1984 Radio interferometry at 89 GHz with transcontinental baselines can probe the region of active galaxies and quasars where collimation of relativistic outflows occur on length scales of 1017–18cm. Three experiments have been conducted recently to demonstrate the feasability and importance of this investigation.
openaire +1 more source
, 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
Lunar Observations and Geodetic VLBI – A Simulation Study [Elektronisk resurs] [PDF]
, 2017 The recent OCEL (Observing the Chang’E Lander with VLBI) sessions allow the geodetic VLBI community to gain new experience concerning observations of an artificial lunar radio source.
Klopotek, Grzegorz, +2 more
core
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
doaj +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
openaire +2 more sources
HartRAO Site Tie Measurements: VLBI and Ground Survey [PDF]
, 2019 A first short baseline VLBI experiment between the Hartebeesthoek Radio Astronomy Observatory´s (HartRAO) 26m legacy and co-located 15m radio telescopes has been conducted. The local automated site tie system at HartRAO is currently being implemented and
Krasna, Hana +8 more
core
Improvement of orbit determination for geostationary satellites with VLBI tracking [PDF]
, 2011 China's COMPASS satellite navigation system consists of five or more geostationary (GEO) satellites. The roles of GEO satellites are to improve the regional user's positioning accuracy and provide the continuous Radio Determination Satellite Service. The
Shi ShanBin +6 more
core +1 more source
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
The Synergy between VLBI and Gaia astrometry [PDF]
, 2018 With the publication of Gaia DR2, 1.3 billion stars now have public parallax and proper motion measurements. In this contribution, we compare the results for sources that have both optical and radio measurements, focusing on circumstellar masers.
van Langevelde, H. J., +12 more
core