Pulse‐phase–averaged spectra of 4U 0115+63 on March 27 (left) and April 8 (right). (a, e) Background‐subtracted spectra of the PCA and HEXTE, shown in comparison with the best‐fit NPEX×CYAB model (histograms). Two resonances are incorporated to fit the March 27 data, but only a single resonance for the April 8 data. (d, g) Ratios from the NPEX model fits. (b, c, g) Ratios from the NPEX model with (b) triple, (c) double, and (f) single CRSF.