"Infrared radiation." . . "Gamma rays." . . "Cosmic dust." . . "Active galactic nuclei." . . . . . "A snapshot of the continuous emission of the active galactic nucleus in NGC 3783 from gamma-ray to radio wavelengths"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . "Ultraviolet radiation." . . "Spectral energy distribution." . . . . "Infrared spectra." . . "Accretion disks." . . "Thermal emission." . .