HKW12-selection. See also caption of Fig. B.6. Top panel: W1 − W2 vs W1 CMD. To clean the sample of extra-galactic contamination we exclude sources below the black bottom lines, indicating the AGN-cut (gray boxes). Bottom panel: K_s − W2 vs H − K_s CCD. The black lines show the selection conditions, and the black dashed lines the additional condition for a region with no AGN contamination. This gives a selection of 52 new YSO candidates outside the IRAC region.