X-ray light curves of the targets with a 1 ks binning. The XMM-Newton observation of WASP-80 is about 5 ks longer, and the count rate is the sum of all EPIC detectors; the error is given by the pipeline. In the Chandra observations, error bars represent the 1-sigma Poissonian uncertainty on the count rate. Planetary transits during observations are marked by shaded areas. The WASP-10 panel shows only the arrival times of the five source photons. The last panel depicts the hardness ratio (0.65 − 2.0/0.2 − 0.65 keV) in the WASP-80 observation. No pronounced flare occurred during the observations.