Collection of spectral energy distributions obtained with moderate cuts for each IRF period. Purple open diamonds represent measurements of the Crab Nebula spectrum from the 3FHL (Ajello et al. 2017), the orange curve shows the Crab Nebula spectrum published by VERITAS in Meagher (2015), open blue points show the fluxes that would be obtained if throughput is not calibrated during the reconstruction of γ-ray showers and instead the MC model from 2012 is employed. Finally, red solid points show the spectral points that are obtained once the pulse signals are calibrated to generate correct IRFs for each period.