EDP Sciences
Free access
Issue A&A
Volume 487, Number 2, August IV 2008
Page(s) 749 - 754
Section Planets and planetary systems
DOI http://dx.doi.org/10.1051/0004-6361:20078949
Published online 24 June 2008

A&A 487, 749-754 (2008)
DOI: 10.1051/0004-6361:20078949

A transiting planet among 23 new near-threshold candidates from the OGLE survey - OGLE-TR-182

F. Pont1, O. Tamuz2, A. Udalski3, 4, T. Mazeh2, F. Bouchy5, C. Melo6, D. Naef6, N. C. Santos7, C. Moutou8, R. F. Diaz9, W. Gieren10, M. Gillon1, S. Hoyer11, M. Kubiak3, 4, M. Mayor1, D. Minniti12, G. Pietrzynski3, 4, 10, D. Queloz1, S. Ramirez12, M. T. Ruiz11, A. Shporer2, I. Soszynski3, 4, O. Szewczyk3, 4, 10, M. K. Szymanski3, 4, S. Udry1, K. Ulaczyk3, 4, L. Wyrzykowski4, 13, and M. Zoccali12

1  Observatoire de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
    e-mail: frederic.pont@obs.unige.ch
2  School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
3  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478, Warsaw, Poland
4  The OGLE Team
5  Institut d'Astrophysique de Paris, 98bis Bd Arago, 75014 Paris, France
6  European Southern Observatory, Casilla 19001, Santiago 19, Chile
    e-mail: cmelo@eso.org
7  Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
8  Laboratoire d'Astrophysique de Marseille, Traverse du Siphon, BP8, Les Trois Lucs, 13376 Marseille Cedex 12, France
9  Instituto de Astronomia y Física del Espacio, Buenos Aires, Argentina
10  Departamento de Astronomia, Universidad de Concepción, Casilla 160-C, Concepción, Chile
11  Department of Astronomy, Universidad de Chile, Santiago, Chile
12  Departmento de Astronomía y Astrofísica, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile
13  Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK

Received 28 October 2007 / Accepted 18 June 2008

By re-processing the data of the second season of the OGLE survey for planetary transits and adding new mesurements on the same fields gathered in subsequent years with the OGLE telescope, we have identified 23 new transit candidates, recorded as OGLE-TR-178 to OGLE-TR-200. We studied the nature of these objects with the FLAMES/UVES multi-fiber spectrograph on the VLT. One of the candidates, OGLE-TR-182, was confirmed as a transiting gas giant planet on a 4-day orbit. We characterised it with further observations using the FORS1 camera and UVES spectrograph on the VLT. OGLE-TR-182b is a typical "hot Jupiter" with an orbital period of 3.98 days, a mass of $1.01 \pm 0.15~M_{\rm Jup}$ and a radius of 1.13 $^{+0.24}_{-0.08}~R_{\rm Jup}$. Confirming this transiting planet required a large investment in telescope time with the best instruments available, and we comment on the difficulty of the confirmation process for transiting planets in the OGLE survey. We delineate the zone were confirmation is difficult or impossible, and discuss the implications for the CoRoT space mission in its quest for transiting telluric planets.

Key words: planetary systems -- stars: individual: OGLE-TR-182

© ESO 2008

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Editor-in-Chief: T. Forveille
Letters Editor-in-Chief: J. Alves
Managing Editor: N. Aghanim

ISSN: 0004-6361 ; e-ISSN: 1432-0746
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Published by: EDP Sciences

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