WASP-36b : a new transiting planet around a metal-poor G-Dwarf, and an investigation into analyses based on a single transit light curve

We report the discovery, from WASP and CORALIE, of a transiting exoplanet in a 1.54 day orbit. The host star, WASP-36, is a magnitude V = 12.7, metal-poor G2 dwarf ($\mbox{$T_{\rm eff}$}= 5959\pm 134$ K), with [Fe/H] =–0.26 ± 0.10. We determine the planet to have mass and radius, respectively, 2.30 ± 0.07 and 1.28 ± 0.03 times that of Jupiter. We have eight partial or complete transit light curves, from four different observatories, which allow us to investigate the potential effects on the fitted system parameters of using only a single light curve. We find that the solutions obtained by analyzing each of these light curves independently are consistent with our global fit to all the data, despite the apparent presence of correlated noise in at least two of the light curves