Example of the five mathematical models included in our fitting procedure: A single power law (pl) (Equation (1)) in blue, a single power law with an exponential (exp) cut-off (x = 2, Equation (3)) in orange, a double power law (Equation (2)) in green, a double power law with an exponential cut-off (x = 2, Equation (4)) in red, and a triple power law (Equation (5)) in purple. The blue dashed line represents the break energy of the double power law and the double power law function with an exponential cut-off and the first break of the triple power law function. The dashed red line represents the break energy of the second break of the triple power law function. The dashed black line represents the exponential cut-off energies.