Crab E > 100 MeV light curve (upper panel), the (middle panel), and the off-axis angle (in degrees) as a function of time (lower panel) for detections with an off-axis angle lower than 50° and exposures greater than 9 × 10⁶ cm² s. The 1AGL flux values and the 1σ error levels are shown as magenta line and black dashed lines, while the weighted mean value of all OB fluxes and its 1σ error levels are shown in orange. The 2007 Crab flare episode (MJD = 54 381.5) is its most significant detection at a flux of 62.0 ± 7.0 × 10^-7 ph cm^-2 s^-1. Large error bars at MJD ≤ 54 420 are mostly obtained with 1−3 day exposures.