Color–magnitude diagrams resulting from the HAWK-I survey. The top panels correspond to the S Ori 73 pointing, middle panels display the field around S Ori 70, and the lower panels illustrate the photometry of the third pointing. Sources discussed in this work are plotted as red circles (S Ori 70 and 73) and with a red triangle (new T-type candidate). Completeness and limiting magnitudes are indicated by a dashed and a solid line, respectively. Our photometric criteria to select new methane candidates are shown with a gray-shaded region. Average error bars are given to the left, and masses (M_Jup) predicted for the age of 3 Myr are labelled on the right side of the diagrams.