Extended Data Fig. 2: Filtering criteria for the measured data.
From: Observation of Rabi dynamics with a short-wavelength free-electron laser

a, Shot-to-shot variation of the FEL bandwidth (FWHM) as a function of the photon energy. The blue dots represent the measured FWHM using the PADRES spectrometer and the red dots represent the filtered shots. b, Same as a, but for the integrated spectral intensity. c, All the shots are distributed over 30 equally spaced (spacing: ~13 meV) photon-energy bins, spanning the entire range of wavelength scan. The red ones correspond to the filtered shots satisfying both the criteria in panel a–b.