Fig. 7
Distribution of photon spectral index Γ for the 439 2WHSP-FGL sources (red-continuous line). For the new γ-ray signatures we have: solid indigo bars considers all the 150 detections at TS > 10, red dashed line only for the 85 detections at TS > 25 level, and blue dashed line only for the 65 lower-significance detections with TS in between 10 to 25.
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