Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photometric detection of high proper motions in dense stellar fields
  using Difference Image Analysis   The Difference Image Analysis (DIA) of the images obtained by the Optical
Gravitational Lensing Experiment (OGLE-II) revealed a peculiar artifact in the
sample of stars proposed as variable by Wozniak (2000) in one of the Galactic
bulge fields: the occurrence of pairs of candidate variables showing
anti-correlated light curves monotonic over a period of 3 years. This effect
can be understood, quantified and related to the stellar proper motions. DIA
photometry supplemented with a simple model offers an effective and easy way to
detect high proper motion stars (HPM stars) in very dense stellar fields, where
conventional astrometric searches are extremely inefficient.

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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex