http://arxiv.org/abs/1705.03937
We present the MOA Collaboration light curve data for planetary microlensing event OGLE-2015-BLG-0954, which was previously announced in a paper by the KMTNet and OGLE Collaborations. The MOA data cover the caustic exit, which was not covered by the KMTNet or OGLE data, and they provide a more reliable measurement of the finite source effect. The MOA data also provide a new source color measurement that reveals a lens-source relative proper motion of $\mu_{\rm rel} = 11.8\pm 0.8\,$mas/yr, which compares to the value of $\mu_{\rm rel} = 18.4\pm 1.7\,$mas/yr reported in the KMTNet-OGLE paper. This new MOA value for $\mu_{\rm rel}$ has an a priori probability that is a factor of $\sim 100$ times larger than the previous value, and it does not require a lens system distance of $D_L < 1\,$kpc. Based on the corrected source color, we find that the lens system consists of a planet of mass $3.4^{+3.7}{-1.6} M{\rm Jup}$ orbiting a $0.30^{+0.34}{-0.14}M\odot$ star at an orbital separation of $2.1^{+2.2}{-1.0}\,$AU and a distance of $1.2^{+1.1}{-0.5}\,$kpc.
D. Bennett, I. Bond, F. Abe, et. al.
Fri, 12 May 17
7/55
Comments: 18 pages, 2 figures, submitted to AAS Journals
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