 The team obtained better quality light curves to guide the photometric and spectroscopic follow-up necessary to classify a candidate as an actual planetary companion.To confirm XO-5b's planetary nature radial velocity observations of XO-5 were made with the high resolution spectrograph on the 11 meter Hobby–Eberly Telescope located at McDonald Observatory, in order to measure the mass of the planet.Commencing on December 7, 2007 a total of ten radial velocity measurements were made which confirmed XO-5b's status as a planet.