27 citations · 91 across the 11 of their papers we have counts for
11 papers
On More than Two Decades of Celestial Reference Frame VLBI Observations in the Deep South: IVS-CRDS (1995-2021)
S. Weston, A. de Witt, Hana Krasna +13
The International VLBI Service for Geodesy & Astrometry (IVS) regularly provides high-quality data to produce Earth Orientation Parameters (EOP), and for the maintenance and realiz…
VLBI Astrometry of Radio Stars to Link Radio and Optical Celestial Reference Frames. I. HD 199178 AR Lacertae
Wen Chen, Bo Zhang, Jingdong Zhang +6
To accurately link the radio and optical Celestial Reference Frames (CRFs) at optical bright end, i.e., with Gaia G band magnitude < 13, increasing number and improving sky distrib…
Astrometric Apparent Motion of High-redshift Radio Sources
Oleg Titov, Sandor Frey, Alexei Melnikov +10
Radio-loud quasars at high redshift (z > 4) are rare objects in the Universe and rarely observed with Very Long Baseline Interferometry (VLBI). But some of them have flux density s…
VLBI astrometry on the white dwarf pulsar AR Scorpii
Pengfei Jiang, Lang Cui, Jun Yang +12
AR Scorpii (AR Sco), the only-known radio-pulsing white dwarf binary, shows unusual pulsating emission at the radio, infrared, optical and ultraviolet bands. To determine its astro…
Unprecedented change in the position of four radio sources
Oleg Titov, Sándor Frey, Sébastien Lambert +7
Astrometric positions of radio-emitting active galactic nuclei (AGNs) can be determined with sub-milliarcsec accuracy using very long baseline interferometry (VLBI). The usually sm…
J2102+6015: a young radio source at z = 4.575
Yingkang Zhang, Tao An, Sándor Frey +7
Jets of high-redshift active galactic nuclei (AGNs) can be used to directly probe the activity of the black holes in the early Universe. Radio sources with jets misaligned with res…
Testing General Relativity with geodetic VLBI: what profit from a single, specially designed experiment?
Oleg Titov, Anastasiia Girdiuk, Sebastien Lambert +15
Context. We highlight the capabilities of the geodetic VLBI technique to test General relativity in the classical astrometric style, i.e., measuring the deflection of light in the…
Current status of Shanghai VLBI correlator
Wu Jiang, Zhiqiang Shen, Fengchu Shu +2
Shanghai Astronomical Observatory has upgraded its DiFX cluster to 420 CPU cores and a 432-TB storage system at the end of 2014. An international network connection for the raw dat…
Testing of General Relativity with Geodetic VLBI
O. Titov
The geodetic VLBI technique is capable of measuring the Sun's gravity light deflection from distant radio sources around the whole sky. This light deflection is equivalent to the c…
VLBI ecliptic plane survey: VEPS-1
Fengchun Shu, Leonid Petrov, Wu Jiang +12
We present here the results of the first part of the VLBI Ecliptic Plane Survey (VEPS) program. The goal of the program is to find all compact sources within of the ecl…
Progress on VLBI Ecliptic Plane Survey
Fengchun Shu, Leonid Petrov, Wu Jiang +5
We launched the VLBI Ecliptic Plane Survey program in 2015. The goal of this program is to find all compact sources within 7.5 degrees of the ecliptic plane which are suitable as p…