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

Tsapras, Y.; Hundertmark, M.; Wyrzykowski, Ł.; Horne, K.; Udalski, A.; Snodgrass, C.; Street, R.; Bramich, D. M.; Dominik, M.; Bozza, V.; Figuera Jaimes, R.; Kains, N.; Skowron, J.; Szymański, M. K.; Pietrzyński, G.; Soszyński, I.; Ulaczyk, K.; Kozłowski, S.; Pietrukowicz, P. and Poleski, R. (2016). The OGLE-III planet detection efficiency from six years of microlensing observations (2003–2008). Monthly Notices of the Royal Astronomical Society, 457(2) pp. 1320–1331.

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DOI (Digital Object Identifier) Link: https://doi.org/10.1093/mnras/stw023
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Abstract

We use six years (2003–2008) 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. The survey sensitivity to small planets is highest in the range 1–4 au, shifting to slightly larger separations for more massive ones.

Item Type: Journal Item
Copyright Holders: 2016 The Authors
ISSN: 0035-8711
Keywords: gravitational lensing; micro – planetary systems
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Space
Item ID: 46892
Depositing User: Colin Snodgrass
Date Deposited: 29 Jul 2016 13:47
Last Modified: 02 May 2019 10:25
URI: http://oro.open.ac.uk/id/eprint/46892
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