Landing page for project EG110

Radio-loud AGN with jets oriented close to our line of sight are the most numerous class of extragalactic objects detected in TeV regime. The Doppler and Lorentz factors are markedly different when derived from the high-energy and the pc-scale radio emission, and possibly indicate structured jet. Balmaverde+ compiled a list of X-ray and radio-detected sources that are good candidates for being TeV-emitting sources (Te-REXes). They were further divided into two groups whether, according to their optical spectra, they show sign of nuclear activity or not. Among the 14 sources that most probably can be detected by the future Cherenkov Telescope Array (CTA), 4 do not show sign of an active nucleus but the authors hypothesized that they contain a faint AGN, overshone by its host galaxy. We want to observe 6 from these 14 sources which were not targeted by VLBI before. We want to confirm or falsify whether a faint AGN resides in the optically passive-looking galaxies, and to distinguish between jet-related and corona-related radio emission. Since TeV emission is expected from jetted sources, the VLBI observations can help constrain the expected number of TeV sources detectable by CTA.

This data is part of the archive of VLBI data maintained by JIVE on behalf of the EVN, a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa. The EVN archive itself has the DOI https://doi.org/10.17616/R3Z197