Outputs (366)

Validation of strategies for coupling exoplanet PSFs into single-mode fibres for high-dispersion coronagraphy (2022)
Journal Article

On large ground-based telescopes, the combination of extreme adaptive optics (ExAO) and coronagraphy with high-dispersion spectroscopy (HDS), sometimes referred to as high-dispersion coronagraphy (HDC), is starting to emerge as a powerful technique f... Read More about Validation of strategies for coupling exoplanet PSFs into single-mode fibres for high-dispersion coronagraphy.

First On-Sky Demonstration of a Scintillation Correction technique using Tomographic Wavefront Sensing (2023)
Journal Article

Scintillation noise significantly limits high precision ground-based photometry of bright stars. In this paper we present the first ever on-sky demonstration of scintillation correction. The technique uses tomographic wavefront sensing to estimate th... Read More about First On-Sky Demonstration of a Scintillation Correction technique using Tomographic Wavefront Sensing.

Bullseye Analysis: A Fluorescence Microscopy Technique to Detect Local Changes in Intracellular Reactive Oxygen Species (ROS) Production (2022)
Journal Article

Reactive oxygen species (ROS) are naturally produced compounds that play important roles in cell signaling, gene regulation, and biological defense, including involvement in the oxidative burst that is central to the anti-microbial actions of macroph... Read More about Bullseye Analysis: A Fluorescence Microscopy Technique to Detect Local Changes in Intracellular Reactive Oxygen Species (ROS) Production.

Signatures of extended discs and outflows in the circumgalactic medium using the Q0107 quasar triplet (2022)
Journal Article

We use H I absorption along the lines-of-sight to the Q0107 quasar triplet in order to model potential disc and outflow structures in the circumgalactic medium of intervening galaxies at z ≲ 1, as well as the intergalactic medium on scales of up to a... Read More about Signatures of extended discs and outflows in the circumgalactic medium using the Q0107 quasar triplet.

Reconstruction of the emissivity and flow for Doppler coherence imaging spectroscopy (CIS) on J-TEXT (2022)
Journal Article

Doppler coherence imaging spectroscopy (CIS) has been installed on J-TEXT tokamak to provide a wealth of information for carbon impurity ions (CIII). To obtain the local emissivity and flow from the line-integrated information measured by the camera,... Read More about Reconstruction of the emissivity and flow for Doppler coherence imaging spectroscopy (CIS) on J-TEXT.

Demonstrating 24-hour continuous vertical monitoring of atmospheric optical turbulence (2023)
Journal Article

We report what is believed to be the first example of fully continuous, 24-hour vertical monitoring of atmospheric optical turbulence. This is achieved using a novel instrument, the 24-hour Shack-Hartmann Image Motion Monitor (24hSHIMM). Optical turb... Read More about Demonstrating 24-hour continuous vertical monitoring of atmospheric optical turbulence.

Integrated fiber optic spectrally resolved downwelling irradiance sensor for pushbroom spectrometers (2022)
Journal Article

We present an integrated fiber optic spectrally resolved downwelling irradiance sensor for pushbroom hyperspectral imagers. The system comprises of a cosine corrector and custom fiber patch cables, collecting the ambient light in a large solid angle... Read More about Integrated fiber optic spectrally resolved downwelling irradiance sensor for pushbroom spectrometers.

The ESO’s Extremely Large Telescope Working Groups (2022)
Journal Article

An integral field spectrograph for the 4-m European Solar Telescope (2013)
Journal Article

The Robotic Multiobject Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI) (2022)
Journal Article

A system of 5,020 robotic fiber positioners was installed in 2019 on the Mayall Telescope, at Kitt Peak National Observatory. The robots automatically re-target their optical fibers every 10 - 20 minutes, each to a precision of several microns, with... Read More about The Robotic Multiobject Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI).

Reference optical turbulence and wind profiles for single conjugate and extreme adaptive optics (2022)
Journal Article

We present a simple method of extracting a small number of reference optical turbulence and wind profiles from a large data set for single conjugate and extreme adaptive optics (AO) simulations. These reference profiles can be used in slow end-to-end... Read More about Reference optical turbulence and wind profiles for single conjugate and extreme adaptive optics.

DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of our Nearest Neighbor (2023)
Journal Article

We present DESI observations of the inner halo of M31, which reveal the kinematics of a recent merger - a galactic immigration event - in exquisite detail. Of the 11,416 sources studied in 3.75 hours of on-sky exposure time, 7,438 are M31 sources wit... Read More about DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of our Nearest Neighbor.

The European Solar Telescope (2022)
Journal Article

The European Solar Telescope (EST) is a project aimed at studying the magnetic connectivity of the solar atmosphere, from the deep photosphere to the upper chromosphere. Its design combines the knowledge and expertise gathered by the European solar p... Read More about The European Solar Telescope.

CUBES phase a design overview (2022)
Journal Article

We present the baseline conceptual design of the Cassegrain U-Band Efficient Spectrograph (CUBES) for the Very Large Telescope. CUBES will provide unprecedented sensitivity for spectroscopy on a 8 – 10 m class telescope in the ground ultraviolet (UV)... Read More about CUBES phase a design overview.

Design of the VLT-CUBES image slicers: Field re-formatters to provide two spectral resolutions (2022)
Journal Article

CUBES is a high efficiency spectrograph designed for a Cassegrain focus of the Very Large Telescope and is expected to be in operation in 2028. It is designed to observe point or compact sources in a spectral range from 300 to 405nm. CUBES will provi... Read More about Design of the VLT-CUBES image slicers: Field re-formatters to provide two spectral resolutions.

Spectral index selection method for remote moisture sensing under challenging illumination conditions (2022)
Journal Article

Remote sensing using passive solar illumination in the Short-Wave Infrared spectrum is exposed to strong intensity variation in the spectral bands due to atmospheric changing conditions and spectral absorption. More robust spectral analysis methods,... Read More about Spectral index selection method for remote moisture sensing under challenging illumination conditions.

Radio Galaxies at TeV Energies (2022)
Journal Article

Unlike blazars, radio galaxies have jets that are misaligned relative to our line-of-sight. This misaligned geometry provides us with a unique view of both the jet and super massive black hole. To date, four radio galaxies have been detected at TeV e... Read More about Radio Galaxies at TeV Energies.

Probing the parameters of the intergalactic medium using quasars (2022)
Journal Article

We continue our series of papers on intergalactic medium (IGM) tracers using quasi-stellar objects (QSOs), having examined gamma-ray bursts (GRBs) and blazars in earlier studies. We have estimated the IGM properties of hydrogen column density (⁠NHXIG... Read More about Probing the parameters of the intergalactic medium using quasars.

FAST: Fourier domain adaptive optics simulation tool for bidirectional ground-space optical links through atmospheric turbulence (2022)
Journal Article

Free space optical links between the ground and space may be severely degraded by atmospheric turbulence. Adaptive Optics, a technique allowing partial correction of this degradation, is beginning to see use in the field with the potential to achieve... Read More about FAST: Fourier domain adaptive optics simulation tool for bidirectional ground-space optical links through atmospheric turbulence.

The resolved chemical abundance properties within the interstellar medium of star-forming galaxies at z≈ 1.5 (2022)
Journal Article

We exploit the unprecedented depth of integral field data from the KMOS Ultra-deep Rotational Velocity Survey (KURVS) to analyse the strong (Hα) and forbidden ([NII], [SII]) emission line ratios in 22 main-sequence galaxies at z ≈ 1.5. Using the [NII... Read More about The resolved chemical abundance properties within the interstellar medium of star-forming galaxies at z≈ 1.5.