Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: News from the CFHT/ESPaDOnS spectropolarimeter   The ESPaDOnS spectropolarimeter has been in use on the Canada-France-Hawaii
Telescope (CFHT) since 2004, for studying stars, galactic objects and planets.
ESPaDOnS is used in queued service observing mode since 2008, which allows an
optimization of the science outcome. In this article, we summarize the new
functionalities and analyses made on ESPaDOnS operations and data for the
present and future users. These modifications include: signal-to-noise ratio
based observing, radial velocity nightly drifts, the OPERA pipeline under
development, the measurement of H2O content in the Maunakea sky, and the use of
ESPaDOnS with the neighbour telescope Gemini.

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The categories of this paper are: math
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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: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: stat
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th