VLBA images of PKS 2155−304 at 15.4 GHz. The top image is shown using natural weighting, while the bottom image is shown using uniform weighting. Numerical parameters of the images are given in Table 2. The location of the center of the circular Gaussian (excluding the Gaussian representing the core) that was fit to the visibilities is marked with a diamond. The tick marks show the magnitude of the polarized flux (with a scale of 0.2 mas mJy⁻¹ in the top image, and 0.1 mas mJy⁻¹ in the bottom image) and the direction of the EVPA. Tick marks are drawn at pixels where the polarized flux is greater than 3 times the rms noise in the polarization image. The colors show the fractional polarization, with the scale indicated to the right of the images.