Best-fit SED models in optical and near-IR for each of the three star-forming galaxies in RO-1001. The photometry with their respective errorbars are shown in red. The cyan contours show a modified SED with an addition of an example 0.1 Gyr old highly obscured (A_V = 6.5–7.5) constant star-formation history SED in each case. In each case, the resulting stellar-masses are in agreement with our CO[3−2] estimates within 0.1 dex and are hence a representation of contributions of the star-bursting cores.