Bright-rimmed cloud BRC13. Top: composite colour image: red is the column density map from Herschel data, green is the Herschel-PACS image at 100 μm, and blue is the DSS2-red image. The peak column density is 1.7 × 10²² cm^-2. The contours correspond to column densities of 1/2, 1/4, and 1/8 of the peak value. The yellow line shows the direction of the exciting star HD 18326. The field size is 14.7′  ×  7.5′. North is up and east is left. Bottom right: the cluster inside BRC13: red is the Spitzer emission at 4.5 μm, green is the 2MASS K stellar emission, and blue is the Hα emission from the ionized boundary layer (image obtained at the 1.2-m telescope of the Observatoire de Haute-Provence). Bottom left: identification of the YSOs discussed in the text and present in the KOE08 catalogue. The grey-scale underlying image is the Spitzer 4.5 μm data. The red and green circles are respectively the proposed Class I and Class II YSOs. The blue arrows point to the Hα emission stars (classical T Tauri-like stars) identified by Ogura et al. (2002).