Likelihood and Δχ2 profiles for the distance r in the BLR ring geometry for the combined Fermi-LAT and H.E.S.S. (left) and Fermi-LAT and MAGIC fits (right). The spread of the profiles shows the effect of the IACT systematic uncertainties on the measured fluxes. For the H.E.S.S. and Fermi-LAT fits, the TS value is defined as twice the difference between the best-fit log-likelihood and the log-likelihood profiled over r. The dashed lines show where the TS or Δχ2 values are equal to 2.71, which corresponds to lower limits at 95% confidence.
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