Reconstructed flux of the Crab Nebula above 200 GeV, using 1-day bins and IRFs that correctly match the instrument throughput for each period. Results are obtained applying moderate cuts to runs with mean elevation > 50°. Left panel: each color represents an IRF period. The blue dot-dashed curve represents the reference Crab Nebula spectrum of Meagher (2015) integrated above 200 GeV, horizontal solid black lines represent the season-average fluxes, while dashed horizontal curves show the standard deviation of the fluxes for each season. Right panel: shown in gray is the distribution of fluxes for all seasons combined, with a fit to a Gaussian shape as a solid black line. The dashed black curve shows the equivalent result when throughput changes are not taken into account in the IRFs. The vertical blue dashed line shows the reference Crab Nebula flux from Meagher (2015).