Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: THE CANADA-FRANCE REDSHIFT SURVEY III: "Single Emission Line" Objects,
  Analysis of Repeat Observations, and Spectroscopic Identifications in the
  1415+52 and 2215+00 Fields   This paper is one of a series describing the Canada-France Redshift Survey
(CFRS). It is shown how the shape of the continuum around the emission line can
be used to distinguish between [OII] 3727 at z > 0.76 and H$\alpha$ at low
redshift in spectra for which only a single isolated emission line is visible.
Based on this, [OII] 3727 is most likely to be the emission line in most of the
single emission line galaxies in the CFRS. The statistics of the repeated
observations are analyzed to derive an empirical calibration of the reliability
of the spectroscopic identifications in the CFRS, to determine how often
additional observations could lead to the identification of an initially
unidentified object and to provide an estimate of the internal velocity
accuracy. Finally, the results of spectroscopic observations of 413 objects in
the 1415+52 and 2215+00 CFRS survey fields are presented.

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The categories of this paper are: hep-th
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The categories of this paper are: atom-ph
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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: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: cs
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The categories of this paper are: hep-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin