n/a, EAS Publications Series, EDP Sciences 22, pp. 69-83 (2006)
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2006 (v1)Conference paperUploaded on: December 3, 2022
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August 31, 2015 (v1)Conference paper
Astronomical optical interferometers (OI) sample the Fourier transform of the intensity distribution of a source at the observation wavelength. Because of rapid atmospheric perturbations, the phases of the complex Fourier samples (visibilities) cannot be directly exploited , and instead linear relationships between the phases are used (phase...
Uploaded on: March 25, 2023 -
2014 (v1)Journal article
Astronomical optical interferometers sample the Fourier transform of the intensity distribution of a source at the observation wavelength. Because of rapid perturbations caused by atmospheric turbulence, the phases of the complex Fourier samples (visibilities) cannot be directly exploited. Consequently, specific image reconstruction methods...
Uploaded on: December 4, 2022 -
2016 (v1)Conference paper
This paper presents an extension of the spatio-spectral (" 3D ") image reconstruction algorithm called PAINTER (Polychromatic opticAl INTErferometric Reconstruction software). The algorithm is able to solve large scale problems and relies on an iterative process, which alternates estimation of polychromatic images and of complex visibilities....
Uploaded on: February 28, 2023 -
2016 (v1)Journal article
We present a new formulation of a family of proximity operators that generalize the projector step for phase retrieval. These proximity operators for noisy intensity measurements can replace the classical "noise free" projection in any projection-based algorithm. They are derived from a maximum likelihood formulation and admit closed form...
Uploaded on: February 28, 2023 -
2016 (v1)Conference paper
We have recently shown that a posteriori co-phasing of multi-spectral interferograms was possible. 1 In this contribution, we extend our approach so that it can be applied to actual data as provided by Amber 2 or Matisse instruments. The main advantage of the proposed post-processing technique is that it requires no modifications of the...
Uploaded on: February 28, 2023 -
2007 (v1)Journal article
Astron. & Astrophys., 476, pp. 1005-1018 (2007)
Uploaded on: December 3, 2022 -
October 9, 2018 (v1)Conference paper
The Evanescent Wave Coronagraph (EvWaCo) is a coronagraph with an occulting mask based on the frustration of total internal reflection to i) produce an achromatic extinction of the central star and ii) reveal the faint companion surrounding the star. Results obtained in laboratory conditions show contrast performance of a few 10-6 between 10...
Uploaded on: December 4, 2022 -
June 2008 (v1)Conference paper
LITpro is a software for fitting models on data obtained from various stellar optical interferometers, like the VLTI. As a baseline, for modeling the object, it provides a set of elementary geometrical and center-to-limb darkening functions, all combinable together. But it is also designed to make very easy the implementation of more specific...
Uploaded on: December 3, 2022 -
January 15, 2019 (v1)Conference paper
Standardised sensitivity data on marine habitats is an essential support in the management ofhuman activities at regional, national and international scales. We developed a methodology forassessing the sensitivity of marine habitats to human pressures, as well as associated guidanceon how to use the resulting sensitivity assessments. The...
Uploaded on: December 4, 2022 -
2008 (v1)Journal article
International audience
Uploaded on: December 3, 2022 -
2006 (v1)Conference paper
Advances in Stellar Interferometry, SPIE 6268, (2006)
Uploaded on: December 4, 2022 -
July 2012 (v1)Conference paper
We present the results of the fifth Interferometric Imaging Beauty Contest. The contest consists in blind imaging of test data sets derived from model sources and distributed in the OIFITS format. Two scenarios of imaging with CHARA/MIRC-6T were offered for reconstruction: imaging a T Tauri disc and imaging a spotted red supergiant. There were...
Uploaded on: December 2, 2022 -
2009 (v1)Journal article
Astronomy and Astrophysics, 507, pp. 317-326 (2009)
Uploaded on: December 4, 2022 -
April 7, 2021 (v1)Journal article
The evanescent wave coronagraph uses the principle of frustrated total internal reflection (FTIR) to suppress the light coming from the star and study its close environment. Its focal plane mask is composed of a lens and a prism placed in contact with each other to produce the coronagraphic effect. In this paper, we present the experimental...
Uploaded on: December 4, 2022 -
August 2, 2009 (v1)Journal article
Context. The star HD 87643, exhibiting the "B[e] phenomenon", has one of the most extreme infrared excesses for this object class. It harbours a large amount of both hot and cold dust, and is surrounded by an extended reflection nebula. Aims. One of our major goals was to investigate the presence of a companion in HD87643. In addition, the...
Uploaded on: December 3, 2022