LSP of the K2 photometry collected on PG 0101+039, covering the frequency range where the pulsation signals are found. The entire periodogram is divided into two different ranges: the low-frequency g-mode region (blue lines) and the high-frequency p-mode region (yellow and red lines). The dashed horizontal lines are the 5.2σ threshold of the local noise and the colorful vertical segments at the bottom of the LSP indicate the frequencies we extracted.