Far-infrared radio correlation of our sources, as discussed in Sect. 8. μ_FIR and μ_1.4 correspond to the magnification factors appropriate for the dusty and 1.4 GHz synchrotron emission, respectively. Solid blue and red lines show the relationship for q = 2.4 and 2.0, respectively, while the red dotted line is for q = 2.7. The dot-dashed lines show the ±1σ scatter about q = 2.4 at low redshift from Jarvis et al. (2010).