The broadband SEDs of PKS 1510-089 (top left), Mrk 501 (top right), 3C 279 (bottom left), and Mrk 421 (bottom right). The red points represent the averaged γ-ray spectrum retrieved from the 4FGL catalog, while the colored data points are derived from MMDC, with a different color for each analyzed period, represented by the color bar. Gray data points in the bottom right panel represent the archival TeV data.