Euclid preparation - XLIX. Selecting active galactic nuclei using observed colours

Open Access

Fig. 20.

[3.6]−[4.5] colour distribution for objects in our mock catalogue in the EDF, divided by different AGN populations and objects without an AGN. We include only objects with S/N > 3 in both IRAC filters. The vertical black line corresponds to the selection $[3.6] - [4.5] > 0.16$ $\rm [3.6]-[4.5] > 0.16$ (Stern et al. 2012).

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