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Issue A&A Volume 424, Number 3, September IV 2004 Page(s) L31 - L34 Section Letters DOI 10.1051/0004-6361:200400048

A&A 424, L31-L34 (2004)
DOI: 10.1051/0004-6361:200400048

Letter

Accurate radius and mass of the transiting exoplanet OGLE-TR-132b

C. Moutou¹, F. Pont², F. Bouchy¹ and M. Mayor<sup>2

1</sup>  LAM, Traverse du Siphon, BP8, Les Trois Lucs, 13376 Marseille Cedex 12, France
    e-mail: Claire.Moutou@oamp.fr
²  Observatoire de Genève, 51 Chemin des Maillettes,1290 Sauverny, Switzerland

(Received 8 July 2004 / Accepted 1 August 2004 )

Abstract
The exoplanet OGLE-TR-132b belongs to the new class of very hot giant planets, together with OGLE-TR-56b and OGLE-TR-113b, detected by their transits. Recently, radial velocity measurements provided a planetary mass estimate for OGLE-TR-132b. The planet parameters, however, were poorly constrained, because of the very shallow transit in the OGLE light curve. In this letter, based on new VLT/FORS2 photometric follow-up of OGLE-TR-132 of unprecedented quality (1.2 mmag relative photometry), we confirm the planetary nature of the orbiting object, and we derive an accurate measurement of its radius and mass: 1.13  0.08  and 1.19  0.13  . The refined ephemeris of OGLE-TR-132 transits is T₀ = 2 453 142.5888 and P = 1.689857 days.

Key words: planetary systems -- stars: individual: OGLE-TR-132

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© ESO 2004

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