3C 411 is a broad-line radio galaxy (BLRG).[7] It is found to contain a double lobed source. When observed through radio mapping, the source is found to contain a radio emission bridge of low surface brightness connecting the components, with a nuclear point source dominating over the optical object.[6] Imaging by the Very Large Array (VLA) in 1984 showed the source is heavily depolarized with the radio spectrum steepening outside the location of its hotspots. A radio jet is also shown linking with a central component with the hotspot feature that is located in the western radio lobe.[8] At 15 GHz the source also shows signs of spectra steepening in both of its lobes.[9]
An observation conducted in 2014 by XMM Newton found 3C 411 is a flat spectrum radio quasar. It is found to have a cold accretion disk around its central supermassive black hole. The estimated mass of the black hole is 3 x 107Mʘ, and the object has a total fluxdensity of 2.20 ± 0.16 x 10-12erg cm-2 s-1. A double power-law component was also found in 3C 411, mainly made up of a hard component and a Seyfert type-like component.[10]
In March 2019 the object was thought to have a blazar core in its center. However when observed, its jet is shown as straight on a trajectory path with an inclination angle at 50°. Although Very Long Baseline Interferometry (VLBI) observations found the core as compact, it is found to be modelled by multiple jet components instead of a blazar jet, ruling out the possibly of it being classified as a blazar.[11]
^Kataoka, J.; Stawarz, L.; Takahashi, Y.; Cheung, C. C.; Hayashida, M.; Grandi, P.; Burnett, T. H.; Celotti, A.; Fegan, S. J. (2011-07-18), "BROAD-LINE RADIO GALAXIES OBSERVED WITH FERMI -LAT: THE ORIGIN OF THE GeV γ-RAY EMISSION", The Astrophysical Journal, 740 (1): 29, arXiv:1107.3370, Bibcode:2011ApJ...740...29K, doi:10.1088/0004-637X/740/1/29
