Masses and Orbital Constraints for the OGLE-2006-BLG-109Lb,c Jupiter/Saturn Analog Planetary System

We present a new analysis of the Jupiter+Saturn analog system, OGLE-2006-BLG109Lb,c, which was the first double planet system discovered with the gravitational microlensing method. This is the only multi-planet system discovered by any method with measured masses for the star and both planets. In addition to the signatures of two planets, this event also exhibits a microlensing parallax signature and finite source effects that provide a direct measure of the masses of the star and planets, and the expected brightness of the host star is confirmed by Keck AO imaging, yielding masses of M∗ = 0.51 +0.05 −0.04 M , Mb = 231± 19M⊕, and Mc = 86± 7M⊕. The Saturnanalog planet in this system had a planetary light curve deviation that lasted for 11 Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA; Email: [email protected] IGPP, Lawrence Livermore National Laboratory, 7000 East Ave., Livermore, CA 94550, USA Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warszawa, Poland Auckland Observatory, P.O. Box 24-180, Auckland, New Zealand School of Physics and Astronomy, Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv 69978, Israel Farm Cove Observatory, 2/24 Rapallo Place, Pakuranga, Auckland 1706, New Zealand Mt. John Observatory, P.O. Box 56, Lake Tekapo 8770, New Zealand Universidad de Concepción, Departamento de Fisica, Casilla 160–C, Concepción, Chile Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK Department of Physics & Astronomy, Texas A&M University, College Station, TX 77843 Department of Physics, Chungbuk Nat. University, 410 Seongbong-Rho, Hungduk-Gu, Chongju 371-763, Korea Korea Astronomy and Space Science Institute, 61-1 Hwaam-Dong, Yuseong-Gu, Daejeon 305-348, Korea Campo Catino Astronomical Observatory, P.O. Box Guarcino, Frosinone 03016, Italy AUT University, School of Computing and Mathematical Sciences, Auckland, New Zealand Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, 464-8601, Japan Institute for Information and Mathematical Sciences, Massey University, Auckland 1330, New Zealand Department of Physics, University of Auckland, Private Bag 92-019, Auckland 1001, New Zealand University of Canterbury, Department of Physics and Astronomy, Christchurch 8020, New Zealand School of Chemical and Physical Sciences, Victoria University, Wellington, New Zealand Department of Physics, Konan University, Nishiokamoto 8-9-1, Kobe 658-8501, Japan Nagano National College of Technology, Nagano 381-8550, Japan Tokyo Metropolitan College of Aeronautics, Tokyo 116-8523, Japan Department of Physics and Astrophysics, Faculty of Science, Nagoya University, Nagoya 464-8602, Japan School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK Institut d’Astrophysique de Paris, CNRS, 98bis Boulevard Arago, 75014 Paris, France European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748 Garching bei München, Germany SOFIA Science Center, NASA Ames Research Center, Mail Stop N211-3, Moffett Field CA 94035, USA Deutsches SOFIA Institut, Universitaet Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany SUPA, University of St Andrews, School of Physics & Astronomy,North Haugh, St Andrews, KY16 9SS, UK LATT, CNRS, Universit de Toulouse, 14 avenue Edouard Belin, 31400 Toulouse, France University of Tasmania, School of Mathematics and Physics, Private Bag 37, Hobart, TAS 7001, Australia European Southern Observatory, Casilla 19001, Vitacura 19, Santiago, Chile Astrophysics Research Institute, Liverpool John Moores University, Egerton Wharf, Birkenhead CH41 1LD, UK Las Cumbres Observatory, 6740B Cortona Dr, suite 102, Goleta, CA 93117, USA Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 03755, USA Department of Astronomy, University of Massachusetts, Amherst, MA 01002, USA