SED of the Galactic center gamma-ray source measured by MAGIC between 2012 and 2015, unfolded with the method of Schmelling (1994; black data points), and the forward folding fit result, assuming a power-law with exponential cut-off (shaded area, see Sect. 3.1 for details). Previous measurements by H.E.S.S and VERITAS are also shown for comparison. The gray arrows indicate the estimated systematic uncertainty of our measurements for different energy ranges (see Sect. 2.3), considering also the slope of the effective collection area vs. energy.