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We report the independent discovery of a new extrasolar transiting planetaround OGLE-TR-113, a candidate star from the Optical Gravitational LensingExperiment. Small radial-velocity variations have been detected based onobservations conducted with the MIKE spectrograph on the Magellan I (Baade)telescope at the Las Campanas Observatory (Chile) during 2003. We have alsocarried out a light-curve analysis incorporating new photometry and realisticphysical parameters for the star. OGLE-TR-113b has an orbital period of only1.43 days, a mass of 1.08 +/- 0.28 M_Jup, and a radius of 1.09 +/- 0.10 R_Jup.Similar parameters have been obtained very recently in an independent study byBouchy et al., from observations taken a year later. The orbital period ofOGLE-TR-113b, and also that of the previously announced planet OGLE-TR-56b(P_orb = 1.21 days) -- the first two found photometrically -- are much shorterthan the apparent cutoff of close-in giant planets at 3-4-day periods foundfrom high-precision radial velocities surveys. Along with a third case reportedby Bouchy et al. (OGLE-TR-132b, P_orb = 1.69 days), these objects appear toform a new class of ``very hot Jupiters'' that pose very interesting questionsfor theoretical study.

The Transiting Extrasolar Giant Planet around the Star OGLE-TR-113