Image Details
Caption: Figure 12.
Distribution of photon indices for the populations of FSRQs (red) and BLLs (blue) as reported in the 2FLE. Not only did the 2FLE detect MeV-dominated FSRQs but also low-, intermediate- and high-synchrotron peaked BLLs, the latter displaying hard MeV photon indices, hence, likely peaking in the GeV–TeV band. We note that the distribution of BLLs in the index is asymmetric, with more BLLs reported with indices of Γ < 2 compared to Γ > 2.
© 2026. The Author(s). Published by the American Astronomical Society.