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G. Tev and B. Lightcurves-of, Fluxes are calculated in 1-day bins for VERITAS (red squares) The red dashed line shows the yearly averaged TeV flux in 2011 (8.0 × 10 ?12 cm ?2 s ?1 ) [121]. The Fermi-LAT fluxes are calculated with 1-day integration bins (blue crosses), in the energy range 100 MeV < E < 500 GeV. The blue dashed line correspond to the average flux from the 3FGL catalog [44]. For the Fermi-LAT data, down-pointing triangles indicate 95 % c.l. upper limits for time bins with signal smaller than 2?, p.74, 2013.

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H. E. Observations-of-the and .. , experiment before and after the upgrade phase. The CT1 telescope was not included in observations until March, the month during which the three other H. E. S. S. telescopes entered in the upgrade phase, the array started to be re-commissioned with five telescopes. The months during which the H. E. S. S. experiment observed the Crab Nebula are marked with down cyan triangles and the Fermi-LAT flare is indicated in orange, p.125, 2016.

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