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Table 3.
IR AGN colour–colour classification schemes.
| Spitzer IRAC power law | |
| Alonso-Herrero et al. (2006), Donley et al. (2007) | |
| Power law |
 |
| Spitzer IRAC colour–colour (flux densities) | |
| Lacy et al. (2007), Donley et al. (2012); | |
| Kirkpatrick et al. (2012) | |
| x = log10(S5.8 μm/S3.6 μm), y = log10(S8 μm/S4.5 μm) | |
| L07 |
 |
| D12 |
 |
| K12 |
 |
| Spitzer IRAC colour–colour (magnitudes) | |
| Stern et al. (2005) | |
| x = [5.8]V − [8.0]V, y = [3.6]V − [4.5]V | |
| S05 |
 |
| Ks-IRAC-MIPS | |
| Messias et al. (2012), Messias et al. (2014) | |
| x = [Ks]AB − [4.5]AB, y = [4.5]AB − [8.0]AB, | |
| w = [8.0]AB − [24]AB | |
| KI |
 |
| KIM |
 |
| WISE | |
| Mateos et al. (2012), Jarrett et al. (2011); | |
| Stern et al. (2012) | |
| x = [4.6]V − [12]V, y = [3.4]V − [4.6]V | |
| M12 |
 |
| J11 |
 |
| S12 |
 |
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