Comparison of the observed full-phase spectrum with four theoretical models, namely OG-A, OG-B, Wind-A and Wind-B. Descriptions of points and lines are at the bottom-left corner. OG stands for “outer gap”. CR stands for “curvature radiation”. “Primary” means emission from primarily accelerated electrons. “Pair” means emission from leptonic pairs generated by cascades. “OG-B (Extended)” is the nominal OG-B model modified with a power-law extension to the cascade pair spectrum. References: [0] this work, [1] Nguyen & VERITAS Collaboration (2015), [2] Ansoldi et al. (2016), [3] Aleksić et al. (2012), [4] Harding & Kalapotharakos (2015), [5] Aharonian et al. (2012), [6] Mochol & Petri (2015).