I. A. Bond et al 2004 ApJ 606 L155 doi:10.1086/420928
OGLE 2003-BLG-235/MOA 2003-BLG-53: A Planetary Microlensing Event
FREEI. A. Bond1, A. Udalski2, M. Jaroszyński2,3, N. J. Rattenbury4, B. Paczyński3, I. Soszyński2, L. Wyrzykowski2, M. K. Szymański2, M. Kubiak2, O. Szewczyk2,3, K. Żebruń2, G. Pietrzyński2,5, F. Abe6, D. P. Bennett7, S. Eguchi6, Y. Furuta6, J. B. Hearnshaw8, K. Kamiya6, P. M. Kilmartin8, Y. Kurata6, K. Masuda6, Y. Matsubara6, Y. Muraki6, S. Noda9, K. Okajima6, T. Sako6, T. Sekiguchi6, D. J. Sullivan10, T. Sumi3, P. J. Tristram4, T. Yanagisawa11, P. C. M. Yock4 and The MOA and OGLE Collaborations
Show affiliationsWe 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 to a single-lens profile was observed in both the MOA (Microlensing Observations in Astrophysics) and OGLE (Optical Gravitational Lensing Experiment) 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
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.
- Subject headings
gravitational lensing; planetary systems; stars: individual (MOA 2003-BLG-53, OGLE 2003-BLG-235)
- Dates
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Issue 2 (2004 May 10)
Received 2004 February 12, accepted for publication 2004 March 10
Published 2004 April 15
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OGLE 2003-BLG-235/MOA 2003-BLG-53: A Planetary Microlensing Event
I. A. Bond et al 2004 ApJ 606 L155
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