  Using new deep VLA and HST observations of the large-scale jet in 3C273
matched to 0.3" resolution, we have detected excess near-ultraviolet emission
(300 nm) above a synchrotron cutoff spectrum accounting for the emission from
radio through optical (3.6 cm - 620 nm). This necessitates a two-component
model for the emission. The radio-optical-X-ray spectral energy distributions
suggest a common origin for the UV excess and the X-rays from the jet.
