Grey-scale representation of the Spitzer averaged 3.6- and 4.5-μm images of 4C 60.07. Superimposed on the IRAC data is the high-resolution SMA 890-μm image of 4C 60.07, with contours plotted at −2.5, 2.5, 3.5, 4.5, 5.5 and 6.5 × 1.1 mJy beam−1, the rms noise level. The size and shape of the SMA's synthesized beam is shown in the bottom left-hand corner of this plot. The FWHM of the SMA's primary beam extends slightly beyond the extent of the image, to ∼30 arcsec FWHM. The position of the radio core – as seen at 4.7 and 8.2 GHz – is shown by a square; those of the steep-spectrum hotspots are labelled with diamonds; the submm components, ‘A’ and ‘B’, are labelled. The IR, radio and submm images are aligned to better than 0.5 arcsec, conservatively.
