Recovering saturated images for high dynamic kernel-phase analysis

@article{Laugier2019RecoveringSI,
  title={Recovering saturated images for high dynamic kernel-phase analysis},
  author={Romain Laugier and Frantz Martinache and Alban Ceau and David L. Mary and Mamadou N'diaye and J.-L. Beuzit},
  journal={Astronomy \& Astrophysics},
  year={2019}
}
Kernel-phase observables extracted from mid- to high-Strehl images are proving to be a powerful tool to probe within a few angular resolution elements of point sources. The attainable contrast is limited, however, by the dynamic range of the imaging sensors. The Fourier interpretation of images with pixels exposed beyond the saturation has so far been avoided. In cases where the image is dominated by the light of a point source, we show that we can use an interpolation to reconstruct the… 

Kernel Phase and Coronagraphy with Automatic Differentiation

TLDR
A new Python package morphine is presented that incorporates existing kernel phase theory within this framework and an extension to the case of a Lyot coronagraph, which is found to have self-calibrating combinations of speckles.

Reconciling kernel-phase and coronagraphy: new steps towards combining the performance of opposing techniques

TLDR
This work investigates how techniques initially developed in the context of coronagraphic observations can be applied with kernel-phase to boost the contrast detection limits, and shows how pupil plane apodization masks can be used to locally decrease the photon noise in the images, therefore improving the capability of kernel- phase to detect faint companions around nearby stars.

Kernel-phase analysis: Aperture modeling prescriptions that minimize calibration errors

TLDR
The paper first uses idealized monochromatic simulations of a non trivial aperture to illustrate the impact modeling choices have on calibration errors, and applies the outlined prescription to two distinct data-sets of images whose analysis has previously been published.

Kernel-phase detection limits

Context. The James Webb Space Telescope (JWST) will offer high angular resolution observing capability in the near-infrared with masking interferometry on the Near-Infrared Imager and Slitless

References

SHOWING 1-10 OF 28 REFERENCES

KERNEL PHASE IN FIZEAU INTERFEROMETRY

The detection of high contrast companions at small angular separation appears feasible in conventional direct images using the self-calibration properties of interferometric observable quantities.

The Palomar Kernel Phase Experiment: Testing Kernel Phase Interferometry for Ground-based Astronomical Observations

At present, the principal limitation on the resolution and contrast of astronomical imaging instruments comes from aberrations in the optical path, which may be imposed by the Earth's turbulent

Phase errors in diffraction-limited imaging: contrast limits for sparse aperture masking

Bispectrum phase, closure phase and their generalisation to kernel-phase are all independent of pupil-plane phase errors to first-order. This property, when used with Sparse Aperture Masking (SAM)

Characterization and Subtraction of Well‐Exposed HST/NICMOS Camera 2 Point‐Spread Functions for a Survey of Very Low Mass Companions to Nearby Stars

We are conducting a search for very low mass (M<0.2 M⊙) companions of stars within 10 pc of the Sun using the NICMOS infrared camera on the Hubble Space Telescope. The highly exposed images of each

The Subaru Coronagraphic Extreme Adaptive Optics System: Enabling High-Contrast Imaging on Solar-System Scales

The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is a multipurpose high-contrast imaging platform designed for the discovery and detailed characterization of exoplanetary systems

ELODIE: A spectrograph for accurate radial velocity measurements

The bre{fed echelle spectrograph of Observatoire de Haute{Provence, ELODIE, is presented. This instrument has been in operation since the end of 1993 on the 1.93 m telescope. ELODIE is designed as an

Discovery of a warm, dusty giant planet around HIP 65426

Aims. The SHINE program is a high-contrast near-infrared survey of 600 young, nearby stars aimed at searching for and characterizing new planetary systems using VLT/SPHERE’s unprecedented

20 years of Hubble Space Telescope optical modeling using Tiny Tim

ABSTRACT Point spread function (PSF) models are critical to Hubble Space Te lescope (HST) data analysis. Astronomers unfamiliar with optical simulation techniques need access to PSF models that

THE SOLAR NEIGHBORHOOD. XXVIII. THE MULTIPLICITY FRACTION OF NEARBY STARS FROM 5 TO 70 AU AND THE BROWN DWARF DESERT AROUND M DWARFS

We report on our analysis of Hubble Space Telescope/NICMOS snapshot high-resolution images of 255 stars in 201 systems within ∼10 pc of the Sun. Photometry was obtained through filters F110W, F180M,

Theoretical Limits on Extrasolar Terrestrial Planet Detection with Coronagraphs

Many high-contrast coronagraph designs have recently been proposed. In this paper, their suitability for direct imaging of extrasolar terrestrial planets is reviewed. We also develop a linear algebra