Fig. A.1.
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Observed hard X-ray light curve (RXTE-PCA data from (Wilson-Hodge et al. 2011), Swift-BAT (Krimm et al. 2013) available through the BAT transient monitor page) from the Crab Nebula. The observed flux varies on time-scales of several years. The observations at VHE (listed in Table A.1) cover different parts of the X-ray flux states.
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