Frans Snik | Christoph U. Keller

Latest

Spatial polarization modulators: distinguishing diffraction effects from spatial polarization modulation
Biosignatures of the Earth. I. Airborne spectropolarimetric detection of photosynthetic life
First light of a holographic aperture mask: Observation at the Keck OSIRIS Imager
Design of the life signature detection polarimeter LSDpol
High contrast imaging for the enhanced resolution imager and spectrometer (ERIS)
MagAO-X first light
Prediction of the planet yield of the MaxProtoPlanetS high-contrast survey for H-alpha protoplanets with MagAO-X based on first light contrasts
Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1
A universal smartphone add-on for portable spectroscopy and polarimetry: iSPEX 2
A universal smartphone add-on for portable spectroscopy and polarimetry: iSPEX 2
On-sky verification of Fast and Furious focal-plane wavefront sensing: Moving forward toward controlling the island effect at Subaru/SCExAO
Overview of focal plane wavefront sensors to correct for the Low Wind Effect on SUBARU/SCExAO
Spatial linear dark field control and holographic modal wavefront sensing with a vAPP coronagraph on MagAO-X
A snapshot full-Stokes spectropolarimeter for detecting life on Earth
ESA Voyage 2050 White Paper: Detecting life outside our solar system with a large high-contrast-imaging mission
High contrast imaging for the enhanced resolution imager and spectrometer (ERIS)
MagAO-X: project status and first laboratory results
Review of high-contrast imaging systems for current and future ground-based and space-based telescopes III: technology opportunities and pathways
Review of high-contrast imaging systems for current and future ground-based and space-based telescopes: Part II. Common path wavefront sensing/control and coherent differential imaging
The Spectropolarimeter for Planetary Exploration: SPEX
Polarization modeling and predictions for DKIST part 2: application of the Berreman calculus to spectral polarization fringes of beamsplitters and crystal retarders
Combining angular differential imaging and accurate polarimetry with SPHERE/IRDIS to characterize young giant exoplanets
Polarization modeling and predictions for DKIST part 2: application of the Berreman calculus to spectral polarization fringes of beamsplitters and crystal retarders
On-sky Performance Analysis of the Vector Apodizing Phase Plate Coronagraph on MagAO/Clio2
HERA: an atmospheric probe to unveil the depths of Saturn
FlySPEX: a flexible multi-angle spectropolarimetric sensing system
Accurate spectrally modulating polarimeters for atmospheric aerosol characterization
Instrumemtation
Mapping atmospheric aerosols with a citizen science network of smartphone spectropolarimeters
Characterizing instrumental effects on polarization at a Nasmyth focus using NaCo
Spectral line polarimetry with a channeled polarimeter
Magnetically Controlled Accretion on the Classical T Tauri Stars GQ Lupi and TW Hydrae
Astronomical Polarimetry: Polarized Views of Stars and Planets
SPICES: spectro-polarimetric imaging and characterization of exoplanetary systems. From planetary disks to nearby Super Earths
Spectropolarimeter for planetary exploration (SPEX): performance measurements with a prototype
M&m's: an error budget and performance simulator code for polarimetric systems
Prototyping for the Spectropolarimeter for Planetary EXploration (SPEX): calibration and sky measurements
The search for magnetic fields in mercury-manganese stars
EPOL: the exoplanet polarimeter for EPICS at the E-ELT
SPEX: the spectropolarimeter for planetary exploration
Spectral modulation for full linear polarimetry
SPEX: an in-orbit spectropolarimeter for planetary exploration
SPHERE ZIMPOL: overview and performance simulation
The upgrade of HARPS to a full-Stokes high-resolution spectropolarimeter