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Fig. 2.

image

K2 light curve and amplitude spectrum for EPIC 214503319 (HD 177765) are given in the top and bottom panels, respectively. The vertical dashed grey lines indicate the location of integer multiples of the K2 thruster firing frequency of νthrus = 4.08 d−1. HD 177765 is a confirmed roAp star, and a Nyquist alias of its high-frequency pulsation modes can be seen at 11.760 ± 0.002 d−1, indicated by the solid green line.

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