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OGLE 2003-BLG-235/MOA 2003-BLG-53: A planetary microlensing event

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arxiv astro-ph/0404309 v1 pith:3CUZCFZZ submitted 2004-04-15 astro-ph

I.A. Bond , A. Udalski , M. Jaroszynski , N.J. Rattenbury , B. Paczynski , I. Soszynski , L. Wyrzykowski , M.K. Szymanski
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M. Kubiak O. Szewczyk K. Zebrun G. Pietrzynski F. Abe D.P. Bennett S. Eguchi Y. Furuta J.B. Hearnshaw K. Kamiya P.M. Kilmartin Y. Kurata K. Masuda Y. Matsubara Y. Muraki S. Noda K. Okajima T. Sako T. Sekiguchi D.J. Sullivan T. Sumi P.J. Tristram T. Yanagisawa P.C.M. Yock
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keywords eventmicrolensingogleblg-235blg-53curvelenslight
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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 a single lens profile was observed in both the MOA and OGLE 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 +/- (11, 07) 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.

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  1. Searching for Habitable Exoplanets with Relative Astrometry (SHERA). I. The Case for Searching for Planets in Binary Star Systems

    astro-ph.EP 2026-08 conditional novelty 4.0 of 10

    SHERA is a proposed Small Explorer astrometry mission that could detect rocky habitable-zone planets around 14 nearby Sun-like stars in binary systems using microarcsecond relative astrometry.

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