Fig. 4
Differential energy spectra of the VHE γ-ray emission from PSR B1259-63/LS 2883 for the data collected around the 2004 (blue squares), 2007 (red triangles), and 2010/2011 (green circles) periastron passages. For the 2004 data the spectrum presented in this paper is shown. The 2007 spectrum is extracted from Aharonian et al. (2009).
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