GTC Follow-up Observations of Very Metal-poor Star Candidates from DESI (2023)
Journal Article
Allende Prieto, C., Aguado, D. S., González Hernández, J. I., Rebolo, R., Najita, J., Manser, C. J., …Zou, H. (2023). GTC Follow-up Observations of Very Metal-poor Star Candidates from DESI. Astrophysical Journal, 957(2), Article 76. https://doi.org/10.3847/1538-4357/acfa96

The observations from the Dark Energy Spectroscopic Instrument (DESI) will significantly increase the numbers of known extremely metal-poor stars by a factor of ∼10, improving the sample statistics to study the early chemical evolution of the Milky W... Read More about GTC Follow-up Observations of Very Metal-poor Star Candidates from DESI.

Line-of-sight optical Dome Turbulence Monitor (2023)
Journal Article
Osborn, J., & Alaluf, D. (2023). Line-of-sight optical Dome Turbulence Monitor. Monthly Notices of the Royal Astronomical Society, 525(2), 1936-1940. https://doi.org/10.1093/mnras/stad2428

Optical turbulence in the enclosure of a ground-based telescope can be a major contributor to the total optical turbulence strength and can therefore limit the precision of astronomical observations, in terms of angular resolution, or signal to noise... Read More about Line-of-sight optical Dome Turbulence Monitor.

Overview of the DESI Milky Way Survey (2023)
Journal Article
Cooper, A. P., Koposov, S. E., Allende Prieto, C., Manser, C. J., Kizhuprakkat, N., Myers, A. D., …Zou, H. (2023). Overview of the DESI Milky Way Survey. Astrophysical Journal, 947(1), Article 37. https://doi.org/10.3847/1538-4357/acb3c0

We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory. Over the next 5 yr DESI MWS will observe approximately seven millio... Read More about Overview of the DESI Milky Way Survey.

Characterisation of detachment in the MAST-U Super-X divertor using multi-wavelength imaging of 2D atomic and molecular emission processes (2023)
Journal Article
Wijkamp, T., Allcock, J., Feng, X., Kool, B., Lipschultz, B., Verhaegh, K., …Jaspers, R. (2023). Characterisation of detachment in the MAST-U Super-X divertor using multi-wavelength imaging of 2D atomic and molecular emission processes. Nuclear Fusion, 63(5), Article 056003. https://doi.org/10.1088/1741-4326/acc191

In this work, we provide the first 2D spatially resolved description of radiative detachment in MAST-U Super-X L-mode divertor plasmas. The Super-X magnetic configuration was designed to achieve reduced heat- and particle loads at the divertor target... Read More about Characterisation of detachment in the MAST-U Super-X divertor using multi-wavelength imaging of 2D atomic and molecular emission processes.

The MUSE Ultra Deep Field (MUDF). III. Hubble Space Telescope WFC3 Grism Spectroscopy and Imaging (2023)
Journal Article
Revalski, M., Rafelski, M., Fumagalli, M., Fossati, M., Pirzkal, N., Sunnquist, B., …Peroux, C. (2023). The MUSE Ultra Deep Field (MUDF). III. Hubble Space Telescope WFC3 Grism Spectroscopy and Imaging. Astrophysical Journal Supplement, 265(2), Article 40. https://doi.org/10.3847/1538-4365/acb8ae

We present extremely deep Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) observations of the MUSE Ultra Deep Field. This unique region of the sky contains two quasars at z ≈ 3.22 that are separated by only ∼500 kpc, providing a stereoscopic... Read More about The MUSE Ultra Deep Field (MUDF). III. Hubble Space Telescope WFC3 Grism Spectroscopy and Imaging.

The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument (2023)
Journal Article
Guy, J., Bailey, S., Kremin, A., Alam, S., Alexander, D., Allende Prieto, C., …Zou, H. (2023). The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument. Astrophysical Journal, 165(4), Article 144. https://doi.org/10.3847/1538-3881/acb212

We describe the spectroscopic data processing pipeline of the Dark Energy Spectroscopic Instrument (DESI), which is conducting a redshift survey of about 40 million galaxies and quasars using a purpose-built instrument on the 4 m Mayall Telescope at... Read More about The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument.

Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet (2023)
Journal Article
Beckett, A., Morris, S. L., Fumagalli, M., Tejos, N., Jannuzi, B., & Cantalupo, S. (2023). Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet. Monthly Notices of the Royal Astronomical Society, 521(1), 1113-1143. https://doi.org/10.1093/mnras/stad596

We examine to what extent disc and outflow models can reproduce observations of H I gas within a few virial radii of galaxies in pairs and groups. Using highly sensitive HST/COS and FOS spectra of the Q0107 quasar triplet covering Ly α for z≲1, as we... Read More about Modelling gas around galaxy pairs and groups using the Q0107 quasar triplet.

Bits Missing: Finding Exotic Pulsars Using bfloat16 on NVIDIA GPUs (2023)
Journal Article
White, J., Adámek, K., Roy, J., Dimoudi, S., Ransom, S. M., & Armour, W. (2023). Bits Missing: Finding Exotic Pulsars Using bfloat16 on NVIDIA GPUs. Astrophysical Journal Supplement, 265(1), https://doi.org/10.3847/1538-4365/acb351

The Fourier domain acceleration search (FDAS) is an effective technique for detecting faint binary pulsars in large radio astronomy data sets. This paper quantifies the sensitivity impact of reducing numerical precision in the graphics processing uni... Read More about Bits Missing: Finding Exotic Pulsars Using bfloat16 on NVIDIA GPUs.

First On-Sky Demonstration of a Scintillation Correction technique using Tomographic Wavefront Sensing (2023)
Journal Article
Hartley, K. E., Farley, O. J., Townson, M. J., Osborn, J., & Wilson, R. (2023). First On-Sky Demonstration of a Scintillation Correction technique using Tomographic Wavefront Sensing. Monthly Notices of the Royal Astronomical Society, 520(3), 4134-4146. https://doi.org/10.1093/mnras/stad420

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.

SHIMM: a versatile seeing monitor for astronomy (2023)
Journal Article
Perera, S., Wilson, R. W., Butterley, T., Osborn, J., Farley, O. J., & Laidlaw, D. J. (2023). SHIMM: a versatile seeing monitor for astronomy. Monthly Notices of the Royal Astronomical Society, 520(4), 5475-5486. https://doi.org/10.1093/mnras/stad339

Characterization of atmospheric optical turbulence is crucial for the design and operation of modern ground-based optical telescopes. In particular, the effective application of adaptive optics correction on large and extremely large telescopes relie... Read More about SHIMM: a versatile seeing monitor for astronomy.

Demonstrating 24-hour continuous vertical monitoring of atmospheric optical turbulence (2023)
Journal Article
Griffiths, R., Osborn, J., Farley, O., Butterley, T., Townson, M. J., & Wilson, R. (2023). Demonstrating 24-hour continuous vertical monitoring of atmospheric optical turbulence. Optics Express, 31(4), 6730-6740. https://doi.org/10.1364/oe.479544

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.

DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of our Nearest Neighbor (2023)
Journal Article
Dey, A., Najita, J. R., Koposov, S., Josephy-Zack, J., Maxemin, G., Bell, E. F., …Zou, H. (2023). DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of our Nearest Neighbor. Astrophysical Journal, 944(1), Article 1. https://doi.org/10.3847/1538-4357/aca5f8

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.

First observations of confined fast ions in MAST Upgrade with an upgraded neutron camera (2023)
Journal Article
Cecconello, M., Dolby, I., Sperduti, A., Rivero-Rodriguez, J., Ericsson, G., Fitzgerald, I., …Elmore, S. (2023). First observations of confined fast ions in MAST Upgrade with an upgraded neutron camera. Plasma Physics and Controlled Fusion, 65(3), Article 035013. https://doi.org/10.1088/1361-6587/acb50c

Spherical tokamaks are key to the successful design of operating scenarios of future fusion reactors in the areas of divertor physics, neutral beam current drive and fast ion physics. MAST Upgrade, which has successfully concluded its first experimen... Read More about First observations of confined fast ions in MAST Upgrade with an upgraded neutron camera.

KSIM: simulating KIDSpec, a Microwave Kinetic Inductance Detector spectrograph for the optical/NIR (2023)
Journal Article
Hofmann, V. B., & O'Brien, K. (2023). KSIM: simulating KIDSpec, a Microwave Kinetic Inductance Detector spectrograph for the optical/NIR. RAS Techniques and Instruments, 2(1), 278-292. https://doi.org/10.1093/rasti/rzad018

KIDSpec, the Kinetic Inductance Detector Spectrometer, is a proposed optical to near-IR Microwave Kinetic Inductance Detector (MKID) spectrograph. MKIDs are superconducting photon counting detectors which are able to resolve the energy of incoming ph... Read More about KSIM: simulating KIDSpec, a Microwave Kinetic Inductance Detector spectrograph for the optical/NIR.

Wavelength calibration of birefringent interferometers for 2-D measurement of plasma flow (2023)
Journal Article
Allcock, J. S., Silburn, S. A., Sharples, R. M., Harrison, J. R., Conway, N. J., Long, T., & Lin, N. (2023). Wavelength calibration of birefringent interferometers for 2-D measurement of plasma flow. Optics Express, 31(2), 1901-1915. https://doi.org/10.1364/oe.473278

Imaging birefringent interferometers are used to measure plasma flow in 2-D via the Doppler shift of a spectral emission line. Applications include plasma physics study in fusion energy experiments and in the Earth’s upper atmosphere. We present a ne... Read More about Wavelength calibration of birefringent interferometers for 2-D measurement of plasma flow.

Bullseye Analysis: A Fluorescence Microscopy Technique to Detect Local Changes in Intracellular Reactive Oxygen Species (ROS) Production (2022)
Journal Article
Hughes, J. G., Chisholm, D. R., Whiting, A., Girkin, J. M., & Ambler, C. A. (2023). Bullseye Analysis: A Fluorescence Microscopy Technique to Detect Local Changes in Intracellular Reactive Oxygen Species (ROS) Production. Microscopy and Microanalysis, 29(2), 529-539. https://doi.org/10.1093/micmic/ozac040

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.

The Robotic Multiobject Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI) (2022)
Journal Article
Silber, J. H., Fagrelius, P., Fanning, K., Schubnell, M., Aguilar, J. N., Ahlen, S., …Zou, H. (2023). The Robotic Multiobject Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI). Astronomical Journal, 165(1), Article 9. https://doi.org/10.3847/1538-3881/ac9ab1

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).

The ESO’s Extremely Large Telescope Working Groups (2022)
Journal Article
Padovani, P., Cirasuolo, M., van der Burg, R., Cantalloube, F., George, E., Kasper, M., …Vigan, A. (2022). The ESO’s Extremely Large Telescope Working Groups. https://doi.org/10.18727/0722-6691/5286

Integrated fiber optic spectrally resolved downwelling irradiance sensor for pushbroom spectrometers (2022)
Journal Article
Graham, C., Girkin, J. M., & Bourgenot, C. (2022). Integrated fiber optic spectrally resolved downwelling irradiance sensor for pushbroom spectrometers. Optics Express, 30(25), 45592-45598. https://doi.org/10.1364/oe.477699

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.

Validation of strategies for coupling exoplanet PSFs into single-mode fibres for high-dispersion coronagraphy (2022)
Journal Article
El Morsy, M., Vigan, A., Lopez, M., Otten, G., Choquet, E., Madec, F., …Murray, G. (2022). Validation of strategies for coupling exoplanet PSFs into single-mode fibres for high-dispersion coronagraphy. Astronomy & Astrophysics, 667, Article A171. https://doi.org/10.1051/0004-6361/202243408

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.