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.
@article{arxiv.astro-ph/0404309,
title = {OGLE 2003-BLG-235/MOA 2003-BLG-53: A planetary microlensing event},
author = {I. A. Bond and A. Udalski and M. Jaroszynski and N. J. Rattenbury and B. Paczynski and I. Soszynski and L. Wyrzykowski and M. K. Szymanski and M. Kubiak and O. Szewczyk and K. Zebrun and G. Pietrzynski and F. Abe and D. P. Bennett and S. Eguchi and Y. Furuta and J. B. Hearnshaw and K. Kamiya and P. M. Kilmartin and Y. Kurata and K. Masuda and Y. Matsubara and Y. Muraki and S. Noda and K. Okajima and T. Sako and T. Sekiguchi and D. J. Sullivan and T. Sumi and P. J. Tristram and T. Yanagisawa and P. C. M. Yock},
journal= {arXiv preprint arXiv:astro-ph/0404309},
year = {2009}
}
Comments
13 pages, 3 colour figures. To appear in Astrophysical Journal Letters (May 2004)