Measured prompt energy spectrum for each integration period (data points) superimposed on the expected prompt energy spectrum, including backgrounds (green region), for the no-oscillation (blue dotted curve) and best-fit (red solid curve), backgrounds at and . Inset: stacked spectra of backgrounds. Bottom: differences between data and no-oscillation prediction (data points) and differences between best-fit prediction and no-oscillation prediction (red curve). The orange band represents the systematic uncertainties on the best-fit prediction.
