Noise level time ranges in the K2 time series. Top panel: normalized K2 flux (blue points) with the best-fit model (transits + GP) obtained from minimization. Mid-panel: residuals data after removing best-fit model. Bottom panel: flag indicating when the K2 spacecraft is firing its thrusters to correct pointing drifts. In all three panels, the vertical dotted black lines show the noise jump timings providing the best likelihood.