Timing analysis of Pass 8 Fermi-LAT data, energy range 0.1−3.0 GeV. a), b) Time interval MJD 54 683−56 838 (same epoch as used in Jaron & Massi 2014, where they used Pass 7 data and the energy range 0.1−300 GeV). The result of the timing analysis is confirmed (compare Fig. 3 in Jaron & Massi 2014): a) periastron, only P₁; and b) apastron, P₁ and P₂. c), d) Time interval is 54 683−57 450: c) periastron, only P₁; and d) apastron, P₁ and P₂, but with less power than in b).