• Unprecedented Change in the Position of Four Radio Sources

      Titov, O; Frey, S; Melnikov, A; Lambert, S; Shu, F; Xia, B; Gonzalez, J; Tercero, B; Gulayev, S; Weston, S; Natusch, T (Royal Astronomical Society, 2022)
      Astrometric positions of radio-emitting active galactic nuclei (AGNs) can be determined with sub-milliarcsec accuracy using very long baseline interferometry (VLBI). The usually small apparent proper motion of distant ...