http://arxiv.org/abs/1601.01699
Spitzer microlensing parallax observations of OGLE-2015-BLG-1212 decisively breaks a degeneracy between planetary and binary solutions that is somewhat ambiguous when only ground-based data are considered. Only eight viable models survive out of an initial set of 32 local minima in the parameter space. These models clearly indicate that the lens is a stellar binary system possibly located within the bulge of our Galaxy, ruling out the planetary alternative. We argue that several types of discrete degeneracies can be broken via such space-based parallax observations.
V. Bozza, Y. Shvartzvald, A. Udalski, et. al.
Mon, 11 Jan 16
44/57
Comments: 26 pages, 6 figures, submitted to ApJ
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