Multi-band images of an IRAC-selected source (irac096525) in the [3.6], R, I, and i ₈₁₄ bands (from left to right and top to bottom). The size of the frames is 15'' ×15''. In the three optical bands, the flux is measured in elliptical apertures (red) whose parameters are determined in the R-band image. Note that, despite the different image resolutions (and multiple HST counterparts), the accurate WCS re-centering (rms < 0 15) allows to place the aperture correctly, recovering the flux of all sources. For the IRAC bands, we use fixed circular apertures of 2'' radius (blue) and we apply a correction to the total magnitude.