Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Performance of the VLT Planet Finder SPHERE II. Data analysis and
  Results for IFS in laboratory   We present the performance of the Integral Field Spectrograph (IFS) of
SPHERE, the high-contrast imager for the ESO VLT telescope designed to perform
imaging and spectroscopy of extrasolar planets, obtained from tests performed
at the Institute de Plan\'etologie et d'Astrophysique de Grenoble facility
during the integration phase of the instrument.} {The tests were performed
using the instrument software purposely prepared for SPHERE. The output data
were reduced applying the SPHERE data reduction and handling software, adding
an improved spectral deconvolution procedure. To this aim, we prepared an
alternative procedure for the spectral subtraction exploiting the principal
components analysis algorithm. Moreover, a simulated angular differential
imaging procedure was also implemented to estimate how the instrument performed
once this procedure was applied at telescope. The capability of the IFS to
faithfully retrieve the spectra of the detected faint companions was also
considered.} {We found that the application of the updated version of the
spectral deconvolution procedure alone, when the algorithm throughput is
properly taken into account, gives us a $5\sigma$ limiting contrast of the
order of 5$\times$$10^{-6}$ or slightly better. The further application of the
angular differential imaging procedure on these data should allow us to improve
the contrast by one order of magnitude down to around 7$\times$$10^{-7}$ at a
separation of 0.3 arcsec. The application of a principal components analysis
procedure that simultaneously uses spectral and angular data gives comparable
results. Finally, we found that the reproducibility of the spectra of the
detected faint companions is greatly improved when angular differential imaging
is applied in addition to the spectral deconvolution.

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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg