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Fig. 11


Bolometric luminosity LX as a functionof temperature T for Group A (red) and Group B (blue). The best-fit functions are also displayed for Group A [a = 2.051, b = 2.512 (fixed) with green and a = 1.742, b = 2.032 (free) with black] and for Group B [a = 1.183, b = 2.512 (fixed) with light blue].

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