The OGLE-III planet detection efficiency from six years of microlensing observations (2003 to 2008)

Abstract

We use six years (2003 to 2008) of Optical Gravitational Lensing Experiment III microlensing observations to derive the survey detection efficiency for a range of planetary masses and projected distances from the host star. We perform an independent analysis of the microlensing light curves to extract the event parameters and compute the planet detection probability given the data. 2433 light curves satisfy our quality selection criteria and are retained for further processing. The aggregate of the detection probabilities over the range explored yields the expected number of microlensing planet detections. We employ a Galactic model to convert this distribution from dimensionless to physical units, α/au and M_E. The survey sensitivity to small planets is highest in the range 1 to 4 au, shifting to slightly larger separations for more massive ones.

14 Pages, 10 Figures, Accepted 2016 January 1

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• Astrophysics with New Horizons: Making the Most of a Generational Opportunity
• RoboTAP - target priorities for robotic microlensing observations
• ROME/REA: A gravitational microlensing search for exo-planets beyond the snow-line on a global network of robotic telescopes
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• An analysis of binary microlensing event OGLE-2015-BLG-0060
• MOA-2019-BLG-008Lb: a new microlensing detection of an object at the planet/brown dwarf boundary
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