2 papers
astro-ph.GA2026
Blazars define a stable celestial reference frame
Nathan Secrest, Sebastien Lambert
Recent work has shown that optical-radio position offsets and radio position variability are inversely correlated with the photometric variability of active galactic nuclei (AGN).…
astro-ph.GA2025
New look at old friends: EVN imaging of prominent radio-loud active galactic nuclei with extremely large radio-optical positional offsets
S. Frey, O. Titov, A. Melnikov +1
When comparing modern fundamental reference frames in the radio (International Celestial Reference Frame) and optical (Gaia), a couple of bright radio reference sources appear to h…