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By analysing the K2 short-cadence photometry we detect starspot occultationevents in the lightcurve of WASP-107, the host star of a warm-Saturn exoplanet.WASP-107 also shows a rotational modulation with a period of 17.5 +/- 1.4 d.Given that the rotational period is nearly three times the planet's orbitalperiod, one would expect in an aligned system to see starspot occultationevents to recur every three transits. The absence of such occultationrecurrences suggests a misaligned orbit unless the starspots' lifetimes areshorter than the star's rotational period. We also find stellar variabilityresembling gamma Doradus pulsations in the lightcurve of WASP-118, which hostsan inflated hot Jupiter. The variability is multi-periodic with a variablesemi-amplitude of about 200 ppm. In addition to these findings we use the K2data to refine the parameters of both systems, and report non-detections oftransit-timing variations, secondary eclipses and any additional transitingplanets. We used the upper limits on the secondary-eclipse depths to estimateupper limits on the planetary geometric albedos of 0.7 for WASP-107b and 0.2for WASP-118b.

Starspots on WASP-107 and pulsations of WASP-118