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Binary Lenses in OGLE-III EWS Database. Seasons 2002--2003

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arxiv astro-ph/0408243 v2 pith:GESYXZOJ submitted 2004-08-12 astro-ph

Binary Lenses in OGLE-III EWS Database. Seasons 2002--2003

M. Jaroszynski , A. Udalski , M. Kubiak , M. Szymanski , G. Pietrzynski , I. Soszynski , K. Zebrun , O. Szewczyk
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L. Wyrzykowski (Warsaw University Observatory)
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classification astro-ph
keywords binarymassseasonscandidatesdatabaseeventslensesogle-iii
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We present 15 binary lens candidates from OGLE-III Early Warning System database for seasons 2002-2003. We also found 15 events interpreted as single mass lensing of double sources. The candidates were selected by visual light curves inspection. Examining the models of binary lenses of this and our previous study (10 caustic crossing events of OGLE-II seasons 1997-1999) we find one case of extreme mass ratio binary (q ~ 0.005) and the rest in the range 0.1<q<1.0, which may indicate the division between planetary systems and binary stars. There is no strong discrepancy between the expected and the observed distributions of mass ratios and separations for binary stars.

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