Image Details
Caption: Figure 10.
The long-term SED of Mrk 421 in the HE to VHE range, measured by LHAASO and Fermi-LAT, along with the functions fitted to the data (parameters given in Table 3). Gray squares represent Fermi-LAT measurements, blue squares WCDA represent measurements, and green squares represent KM2A measurements. The black solid line shows the fit using the PSEC model, while the blue and green dashed lines indicate the fits to the LHAASO data and the Fermi-LAT data individually.
© 2026. The Author(s). Published by the American Astronomical Society.