We report the discovery of a several-Jupiter mass planetary companion to the primary lens star in microlensing event OGLE-2005-BLG-071. Precise (<1%) photometry at the peak of the event yields an extremely high signal-to-noise ratio detection of a deviation from the light curve expected from an isolated lens. The planetary character of this deviation is easily and unambiguously discernible from the gross features of the light curve. Detailed modeling yields a tightly-constrained planet-star mass ratio of q=m_p/M=0.0071+/-0.0003. This is the second robust detection of a planet with microlensing, demonstrating that the technique itself is viable and that planets are not rare in the systems probed by microlensing, which typically lie several kpc toward the Galactic center.
@article{arxiv.astro-ph/0505451,
title = {A Jovian-mass Planet in Microlensing Event OGLE-2005-BLG-071},
author = {A. Udalski and M. Jaroszynski and B. Paczynski and M. Kubiak and M. K. Szymanski and I. Soszynski and G. Pietrzynski and K. Ulaczyk and O. Szewczyk and L. Wyrzykowski and G. W. Christie and D. L. DePoy and S. Dong and A. Gal-Yam and B. S. Gaudi and A. Gould and C. Han and S. Lepine and J. McCormick and B. -G. Park and R. W. Pogge and D. P. Bennett and I. A. Bond and Y. Muraki and P. J. Tristram and P. C. M. Yock and J. P. Beaulieu and D. M. Bramich and S. W. Dieters and J. Greenhill and K. Hill and K. Horne and D. Kubas},
journal= {arXiv preprint arXiv:astro-ph/0505451},
year = {2009}
}
Comments
4 pages. Minor changes. Accepted for publication in ApJ Letters