Correlation between the spectral parameters and MWL fluxes. Panels a–c: curvature parameter b plotted versus the unabsorbed 2–10 keV flux, the position of the synchrotron SED peak E_p, and the photon index a, respectively. The parameters a and E_p are plotted versus the 2–10 keV flux in panels d–e. The scatter plot E_p–log S_p is provided in panel f. The 0.3–10 keV photon index, unabsorbed 0.3–2 keV flux, and V-band and LAT-band fluxes are plotted versus the 2–10 keV flux in panels g–j, respectively. The one-day binned V- and B-band fluxes are plotted against each other in panel k. Finally, a f_var – F_{2 − 10 keV} plot is provided in panell where the vertical dashed red line represents the weighted mean 2–10 keV flux from all XRT observations of 1ES 0033+595. The one-day binned MWL fluxes are used in the corresponding plots, except for panelj where the four-weekly bins are adopted.