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Table 4

Energy scaling factors of the IACTs for the cross calibration.

Instrument Scaling factor sIACT Stat. error Δs

Fermi/LAT 1  +0.05 − 0.03 0.49
HEGRA 1.042  ±0.005 7.652 1.046
H.E.S.S. 0.961  ±0.004 11.84 6.476
MAGIC 1.03  ±0.01 1.671 0.656

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