Wavelet coherence between the SN-14C and SN-10Be series. The color code gives the value of the coherence from 0 (blue) to 1 (red). The arrows denote the relative phase between the series so that the right-pointing arrows correspond to an exact in-phase and the left-pointing arrows to an exact anti-phase relation. Black contours delimit the areas of high coherence (95% confidence level). White curves delimit the cone of influence where results can be influenced by the edges of the time series (beyond which the analysis is possibly biased).