10.6k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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- University of GenevaCH577 papers
23 papers · 2 filters
Observing with NIKA2Pol from the IRAM 30m telescope. Early results on the commissioning phase
A. Ritacco, R. Adam, P. Ade +41
The NIKA2 polarization channel at 260 GHz (1.15 mm) has been proposed primarily to observe galactic star-forming regions and probe the critical scales between 0.01-0.05 pc at which…
The KISS experiment
A. Fasano, M. Aguiar, A. Benoit +30
Mapping millimetre continuum emission has become a key issue in modern multi-wavelength astrophysics. In particular, spectrum-imaging at low frequency resolution is an asset for ch…
NIKA2 mapping and cross-instrument SED extraction of extended sources with Scanamorphos
H. Roussel, N. Ponthieu, R. Adam +38
The steps taken to tailor to NIKA2 observations the Scanamorphos algorithm (initially developed to subtract low-frequency noise from Herschel on-the-fly observations) are described…
KISS: a spectrometric imager for millimetre cosmology
A. Fasano, M. Aguiar, A. Benoit +27
Clusters of galaxies are used to map the large-scale structures in the universe and as probe of universe evolution. They can be observed through the Sunyaev-Zel'dovich (SZ) effect.…
ESA Voyage 2050 white paper -- Faint objects in motion: the new frontier of high precision astrometry
F. Malbet, U. Abbas, J. Alves +28
Sky survey telescopes and powerful targeted telescopes play complementary roles in astronomy. In order to investigate the nature and characteristics of the motions of very faint ob…
Calibration and Performance of the NIKA2 camera at the IRAM 30-meter Telescope
L. Perotto, N. Ponthieu, J. -F. Macías-Pérez +45
NIKA2 is a dual-band millimetric continuum camera of 2900 Kinetic Inductance Detectors (KID), operating at and , installed at the IRAM 30-meter telescope. We p…
The polarimetric imaging mode of VLT/SPHERE/IRDIS II: Characterization and correction of instrumental polarization effects
R. G. van Holstein, J. H. Girard, J. de Boer +31
Context. Circumstellar disks and self-luminous giant exoplanets or companion brown dwarfs can be characterized through direct-imaging polarimetry at near-infrared wavelengths. SPHE…
The polarimetric imaging mode of VLT/SPHERE/IRDIS I: Description, data reduction and observing strategy
J. de Boer, M. Langlois, R. G. van Holstein +31
Context. Polarimetric imaging is one of the most effective techniques for high-contrast imaging and characterization of protoplanetary disks, and has the potential to be instrument…
Hartmann vs. reverse Hartmann test: a Fourier optics point of view
Francois Henault, Cyril Pannetier
The Shack-Hartmann Wavefront Sensor (WFS) is well-known in the fields of optical metrology, wavefront sensing in astronomy, and ophthalmologic control applications. The purpose of…
A snapshot full-Stokes spectropolarimeter for detecting life on Earth
Frans Snik, Christoph U. Keller, David S. Doelman +8
We present the design of a point-and-shoot non-imaging full-Stokes spectropolarimeter dedicated to detecting life on Earth from an orbiting platform like the ISS. We specifically a…
NAOMI: the adaptive optics system of the Auxiliary Telescopes of the VLTI
Woillez J., Abad J. A., Abuter R. +80
The tip-tilt stabilisation system of the 1.8 m Auxiliary Telescopes of the Very Large Telescope Interferometer was never dimensioned for robust fringe tracking, except when atmosph…
GAUSS -- A Sample Return Mission to Ceres
Xian Shi, Julie Castillo-Rogez, Henry Hsieh +26
The goal of Project GAUSS is to return samples from the dwarf planet Ceres. Ceres is the most accessible ocean world candidate and the largest reservoir of water in the inner solar…
Calibration of quasi-static aberrations in exoplanet direct-imaging instruments with a Zernike phase-mask sensor. III. On-sky validation in VLT/SPHERE
A. Vigan, M. N'Diaye, K. Dohlen +12
Second-generation exoplanet imagers using extreme adaptive optics and coronagraphy have demonstrated their great potential for studying close circumstellar environments and for det…
An adaptive scheduling tool to optimize measurements to reach a scientific objective: methodology and application to the measurements of stellar orbits in the Galactic Center
A. Hees, A. Dehghanfar, T. Do +4
In various fields of physics and astronomy, access to experimental facilities or to telescopes is becoming more and more competitive and limited. It becomes therefore important to…
Performance of the Gemini Planet Imager Non-Redundant Mask and spectroscopy of two close-separation binaries HR 2690 and HD 142527
Alexandra Z. Greenbaum, Anthony Cheetham, Anand Sivaramakrishnan +51
The Gemini Planet Imager (GPI) contains a 10-hole non-redundant mask (NRM), enabling interferometric resolution in complement to its coronagraphic capabilities. The NRM operates bo…
The Detailed Science Case for the Maunakea Spectroscopic Explorer, 2019 edition
The MSE Science Team, Carine Babusiaux, Maria Bergemann +258
(Abridged) The Maunakea Spectroscopic Explorer (MSE) is an end-to-end science platform for the design, execution and scientific exploitation of spectroscopic surveys. It will unvei…
Monte Carlo studies for the optimisation of the Cherenkov Telescope Array layout
A. Acharyya, I. Agudo, E. O. Angüner +467
The Cherenkov Telescope Array (CTA) is the major next-generation observatory for ground-based very-high-energy gamma-ray astronomy. It will improve the sensitivity of current groun…
Modeling the e-APD SAPHIRA/C-RED ONE camera at low flux level: an attempt of photon counting in the near-infrared with the MIRC-X interferometric combiner
C. Lanthermann, N. Anugu, J. -B. Le Bouquin +3
We implement an electron avalanche photodiode (e-APD) in the MIRC-X instrument, upgrade of the 6-telescope near-infrared imager MIRC, at the CHARA array. This technology should imp…
Apodized Pupil Lyot Coronagraphs with arbitrary aperture telescopes: novel designs using hybrid focal plane masks
Mamadou N'Diaye, Kevin Fogarty, Rémi Soummer +6
Exoplanet imaging and spectroscopy are now routinely achieved by dedicated instruments on large ground-based observatories (e.g. Gemini/GPI, VLT/SPHERE, or Subaru/SCExAO). In addit…
SPHERE: the exoplanet imager for the Very Large Telescope
J. -L. Beuzit, A. Vigan, D. Mouillet +108
Observations of circumstellar environments to look for the direct signal of exoplanets and the scattered light from disks has significant instrumental implications. In the past 15…
Reference star differential imaging of close-in companions and circumstellar disks with the NIRC2 vortex coronagraph at W.M. Keck Observatory
Garreth Ruane, Henry Ngo, Dimitri Mawet +11
Reference star differential imaging (RDI) is a powerful strategy for high contrast imaging. Using example observations taken with the vortex coronagraph mode of Keck/NIRC2 in $L^\p…
Towards reliable uncertainties in IR interferometry: The bootstrap for correlated statistical & systematic errors
Régis Lachaume, Markus Rabus, Andrés Jordán +4
We propose a method to overcome the usual limitation of current data processing techniques in optical and infrared long-baseline interferometry: most reduction pipelines assume unc…
The GRAVITY fringe tracker
S. Lacour, R. Dembet, R. Abuter +17
The GRAVITY instrument has been commissioned on the VLTI during 2016 and is now available to the astronomical community. It is the first optical interferometer capable of observing…