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Very high contrast IFU spectroscopy of AB Doradus C: 9 mag contrast at 0.2" without a coronagraph using spectral deconvolution

Authors
  • Roberto, Abuter
  • Matthias, Tecza
  • Eric Nielsen
  • Fraser J, Clarke
  • Laird M, Close
  • Niranjan, Thatte
Type
Published Article
Journal
arXiv preprint astro-ph/0703565
Publication Date
Mar 21, 2007
Source
SETI Institute
License
Unknown

Abstract

We present an extension of the spectral deconvolution method (Sparks & Ford 2002) to achieve very high contrast at small inner working radii. We apply the method to the specific case of ground based adaptive optics fed integral field spectroscopy (without a coronagraph). Utilising the wavelength dependence of the Airy and speckle patterns, we make an accurate estimate of the PSF that can be scaled and subtracted from the data cube. The residual noise in the resulting spectra is very close to the photon noise from the ...

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