Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solving for closure errors due to polarization leakage in radio
  interferometry of unpolarized sources   Mechanical and electronic imperfections can result into polarization leakage
in individual antennas of a radio interferometer. Such leakages manifest
themselves as closure errors even in co-polar visibility measurements of
unpolarized sources. This paper describes and tests a method for the study of
polarization leakage for radio interferometric telescopes using {\it only} the
nominally co-polar visibilities for unpolarized calibrators. Interpretation of
the resulting closure phases on the Poincar\'e sphere is presented. Since
unpolarized sources are used, the actual solutions for leakage parameters is
subject to a degeneracy which is discussed. This however, does not affect the
correction of closure errors in our scheme.

14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con