Fig. 3.
Correlation between α of LogP fitting to the MAGIC spectrum for each night (left panel) and the XRT spectrum of each observation (right). The normalisation energy is fixed at 300 GeV for MAGIC and at 1 keV for XRT. The MAGIC spectra are deabsorbed with the model of Franceschini et al. (2008). More details can be found in the text.
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