Left: q_IR vs. infrared luminosity L_{IR / 8 − 1000 μm} in units of solar luminosity. Right: q_IR versus radio luminosity at 1.49 GHz (see Table 1). In both figures, the blue diamonds represent the 46 individual objects in our sample, where objects identified as radio-AGN based on the α-maps are shown as filled blue diamonds (see Table 4). Black squares denote objects with mid-IR fraction above zero (Petric et al. 2011), thus they have a contribution to their mid-IR flux from an AGN. Red filled circles show the mean value of q_IR for each luminosity bin and the error bars are the standard deviation; note that the median luminosity is calculated instead of the mean to avoid edge effects due to bin selection. The dashed horizontal line shows the mean q_IR for the sample with value of 2.75 ± 0.27; the 2σ error is shown by the horizontal dotted lines. Objects with q_IR values below the 1σ error lines are marked with their name.