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- W2034363510 abstract "We analyze the photometric data obtained by PLANET and OGLE on the caustic-crossing binary-lens microlensing event OGLE-2002-BLG-069. Thanks to the excellent photometric and spectroscopic coverage of the event, we are able to constrain the lens model up to the known ambiguity between close and wide binary lenses. The detection of annual parallax in combination with measurements of extended-source effects allows us to determine the mass, distance and velocity of the lens components for the competing models. While the model involving a close binary lens leads to a Bulge-Disc lens scenario with a lens mass of and distance of , the wide binary lens solution requires a rather implausible binary black-hole lens (). Furthermore we compare current state-of-the-art numerical and empirical models for the surface brightness profile of the source, a G5III Bulge giant. We find that a linear limb-darkening model for the atmosphere of the source star is consistent with the data whereas a PHOENIX atmosphere model assuming LTE and with no free parameter does not match our observations." @default.
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- W2034363510 date "2005-05-13" @default.
- W2034363510 modified "2023-09-27" @default.
- W2034363510 title "Full characterization of binary-lens event OGLE-2002-BLG-069 from PLANET observations" @default.
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- W2034363510 doi "https://doi.org/10.1051/0004-6361:20042624" @default.
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