Comparison of different bolometric magnitudes. The adopted magnitudes were calculated through the J−K colour, following Bessell & Wood (1984), and are put in abscissa in both figures. Colour indicates the SpT. Shape identifies the galaxy: circles are from the SMC, squares from the LMC. The black cross represents the median uncertainties. Left a): the ordinate show the bolometric magnitudes calculated from the K_S band through through the constant BC = 2.69mag, as was proposed by Davies et al. (2013). Right b): the ordinate show the difference between the bolometric magnitudes calculated through the two analysed ways.