OGLE 2003-BLG-235/MOA 2003-BLG-53: A Planetary Microlensing Event
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- 15 April 2004
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 606 (2) , L155-L158
- https://doi.org/10.1086/420928
Abstract
We present observations of the unusual microlensing event OGLE 2003-BLG-235/MOA 2003-BLG-53. In this event, a short-duration (~7 days) low-amplitude deviation in the light curve due to a single-lens profile was observed in both the MOA (Microlensing Observations in Astrophysics) and OGLE (Optical Gravitational Lensing Experiment) survey observations. We find that the observed features of the light curve can only be reproduced using a binary microlensing model with an extreme (planetary) mass ratio of 0.0039 for the lensing system. If the lens system comprises a main-sequence primary, we infer that the secondary is a planet of about 1.5 Jupiter masses with an orbital radius of ~3 AU.Keywords
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