HOT-SPOT 3C-20 WEST - AN OPTICAL SYNCHROTRON SOURCE

We report optical and radio observations of the double-lobed radio gal axy 3C 20. The compact radio hot spot in the western lobe also emits o ptical synchrotron radiation and field polarimetry with a Savart plate shows it to be (49 +/- 7) % polarized. The eastern hot spot is not de tected optically. New VLA observations at wavelengths of 6 and 2 cm an d with resolutions of 0.14'' 14 and O.40'' are also presented. A radio core is detected for the first time. We present spectral index maps f or both hot spots and discuss their physics.