Haute-Provence Observatory
Gloas was observed between February 11 and 15 in 2008 by the SOPHIE échelle spectrograph at the Haute-Provence Observatory in France, determining the radial velocity of the transiting body. Use of the FIES echelle spectrograph at the Nordic Optical Telescope in the Canary Islands gained other spectral measurements that yielded the characteristics of the star. Analysis of the SOPHIE and FIES data were used to constrain some of the orbiting body's characteristics. The discovery of the orbiting body's mass using radial velocity measurements led to its confirmation as the planet WASP-13b.