Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Velocity Effects on the Deflection of Light by Gravitational Microlenses   We study the influence of general lens and source velocities on the
gravitational deflection of light by single and two-point-mass microlenses with
general axis orientation. We demonstrate that in all cases the lens equation
preserves its form exactly. However, its parameters -- the Einstein radius and
the binary-lens separation -- are influenced by the lens velocity. In Galactic
microlensing settings the velocity mainly affects the inferred separation for
wide binary-star or star+planet microlenses oriented close to the line of
sight. We briefly discuss the case of lenses moving with highly relativistic
velocities.

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The categories of this paper are: cs
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The categories of this paper are: math
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg