Fig. 14.
Two-dimensional likelihood surface of a power-law fit to the Fermi-LAT data contemporaneous to the H.E.S.S. observations (left) and MAGIC observations (right). The best-fit values are marked in red for H.E.S.S. and green for MAGIC. The likelihood surfaces are used in a simultaneous fit with IACT data to search for BLR absorption features. See main text for further details.
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