Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spitzer as Microlens Parallax Satellite: Mass and Distance Measurements
  of Binary Lens System OGLE-2014-BLG-1050L   We report the first mass and distance measurement of a caustic-crossing
binary system OGLE-2014-BLG-1050L using the space-based microlens parallax
method. \emph{Spitzer} captured the second caustic-crossing of the event, which
occurred $\sim$10 days before that seen from Earth. Due to the coincidence that
the source-lens relative motion was almost parallel to the direction of the
binary-lens axis, the four-fold degeneracy, which was known before only to
occur in single-lens events, persists in this case, leading to either a
lower-mass (0.2 $M_\odot$ and 0.07 $M_\odot$) binary at $\sim$1.1 kpc or a
higher-mass (0.9 $M_\odot$ and 0.35 $M_\odot$) binary at $\sim$3.5 kpc.
However, the latter solution is strongly preferred for reasons including
blending and lensing probability. OGLE-2014-BLG-1050L demonstrates the power of
microlens parallax in probing stellar and substellar binaries.

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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat