Tim Hardy
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View article: Fast resets of sub-windows on infrared detectors as a strategy for persistence mitigation
Fast resets of sub-windows on infrared detectors as a strategy for persistence mitigation Open
Persistence effects in HgCdTe infrared detectors cause significant artifacts\nthat can impact the quality of science observations for up to many hours after\nexposure to bright/saturating sources. This problem will have a substantially\ngr…
View article: FREQUENCY DOMAIN SONAR SIGNAL PROCESSING WITH HIGH SPEED DSP DEVICES
FREQUENCY DOMAIN SONAR SIGNAL PROCESSING WITH HIGH SPEED DSP DEVICES Open
Typical active sonar systems perform their signal processi ng function s in the time domain.Considerab le imp rovement in both performa nce and efficien cy can be achieved by carrying out these tasks in the frequency domain.This paper demo…
View article: The Science Performance of the Gemini High Resolution Optical Spectrograph
The Science Performance of the Gemini High Resolution Optical Spectrograph Open
The Gemini High Resolution Optical Spectrograph (GHOST) is a fiber-fed spectrograph system on the Gemini South telescope that provides simultaneous wavelength coverage from 348 to 1061 nm, and is designed for optimal performance between 36…
View article: The Science Performance of the Gemini High Resolution Optical Spectrograph
The Science Performance of the Gemini High Resolution Optical Spectrograph Open
The Gemini High Resolution Optical Spectrograph (GHOST) is a fiber-fed spectrograph system on the Gemini South telescope that provides simultaneous wavelength coverage from 348 - 1061nm, and designed for optimal performance between 363 - 9…
View article: GHOST Commissioning Science Results: Identifying a New Chemically Peculiar Star in Reticulum II
GHOST Commissioning Science Results: Identifying a New Chemically Peculiar Star in Reticulum II Open
The Gemini High-resolution Optical SpecTrograph (GHOST) is the newest high-resolution spectrograph to be developed for a large-aperture telescope, recently deployed and commissioned at the Gemini-South telescope. In this paper, we present …
View article: National study of NAFLD management identifies variation in delivery of care in the UK between 2019 to 2022
National study of NAFLD management identifies variation in delivery of care in the UK between 2019 to 2022 Open
This study identified significant variation in the management of NAFLD in the UK. Only 27.9% of patients with suspected NAFLD had non-invasive fibrosis assessment performed to identify those at greater risk of advanced liver disease before…
View article: Defining characteristics and outcomes for patients with non-alcoholic fatty liver disease admitted to hospital with decompensated cirrhosis
Defining characteristics and outcomes for patients with non-alcoholic fatty liver disease admitted to hospital with decompensated cirrhosis Open
View article: GHOST Commissioning Science Results: Identifying a new chemically peculiar star in Reticulum II
GHOST Commissioning Science Results: Identifying a new chemically peculiar star in Reticulum II Open
The Gemini High-resolution Optical SpecTrograph (GHOST) is the newest high resolution spectrograph to be developed for a large aperture telescope, recently deployed and commissioned at the Gemini-South telescope. In this paper, we present …
View article: Design, integration tests of SPIDERS: a Subaru Pathfinder Instrument for Detecting Exoplanets Retrieving Spectra
Design, integration tests of SPIDERS: a Subaru Pathfinder Instrument for Detecting Exoplanets Retrieving Spectra Open
SPIDERS is a Subaru Pathfinder Instrument for Detecting Exoplanets and Retrieving Spectra. This instrument is currently integrated and tested at NRC-HAA before being shipped to Subaru Telescope mid-2024. SPIDERS will be installed on the in…
View article: High-Spectral Resolution Dark Holes: Concept, Results, and Promise
High-Spectral Resolution Dark Holes: Concept, Results, and Promise Open
Next generation high contrast imaging instruments face a challenging trade off: they will be required to deliver data with high spectral resolution at a fast cadence and across a wide field of view. For instruments that employ focal plane …
View article: Exoplanet Detection and Characterization: Development and Results of a New Generation Imaging Fourier Transform Spectrometer
Exoplanet Detection and Characterization: Development and Results of a New Generation Imaging Fourier Transform Spectrometer Open
International audience
View article: InfraRed On-Detector Guide-Windows in the era of Extremely Large Telescopes
InfraRed On-Detector Guide-Windows in the era of Extremely Large Telescopes Open
Future Extremely Large Telescopes (ELTs) will require advances in Adaptive Optics (AO) systems to fully realize their potential. In addition to separate, dedicated wavefront sensors, it is recognized that wavefront sensing within the scien…
View article: A near-infrared pyramid wavefront sensor for the MMT
A near-infrared pyramid wavefront sensor for the MMT Open
The MMTO Adaptive optics exoPlanet characterization System (MAPS) is an ongoing upgrade to the 6.5-meter MMT Observatory on Mount Hopkins in Arizona. MAPS includes an upgraded adaptive secondary mirror (ASM), upgrades to the ARIES spectrog…
View article: P67 10% POUGIC little too much – 6yr DGH experience
P67 10% POUGIC little too much – 6yr DGH experience Open
Introduction An upper Gastro-Intestinal (GI) cancer detected within 3 years of Oesophago-Gastro-Duodenoscopy (OGD) is considered as a failure to diagnose cancer earlier, termed Post OGD Upper GI Cancer (POUGIC). POUGIC rates of less than 1…
View article: Fast modulation and dithering for the NFIRAOS pyramid wavefront sensor
Fast modulation and dithering for the NFIRAOS pyramid wavefront sensor Open
The Narrow Field InfraRed Adaptive Optics System (NFIRAOS) for the Thirty Meter Telescope (TMT) will use a natural guide star (NGS) Pyramid Wavefront Sensor (PWFS). A 32-mm diameter Fast Steering Mirror (FSM) is used to modulate the positi…
View article: CASTOR: A Flagship Canadian Space Telescope
CASTOR: A Flagship Canadian Space Telescope Open
CASTOR (The Cosmological Advanced Survey Telescope for Optical and UV Research) is a proposed Canadian-led flagship mission designed to provide high-resolution imaging and spectroscopy in the UV/blue-optical spectral region (0.15-0.55 micr…
View article: The Canadian Roots of the TMT First Light Instruments NFIRAOS and IRIS
The Canadian Roots of the TMT First Light Instruments NFIRAOS and IRIS Open
The two most advanced instrument concepts for the Thirty Meter Telescope (TMT) work together and both have substantial Canadian participation: The Narrow Field Infrared Adaptive Optics System (NFIRAOS) is the first-light facility Multi-Con…
View article: Exoplanet Imaging: a technological and scientific road-map for finding Life signatures on other Worlds.
Exoplanet Imaging: a technological and scientific road-map for finding Life signatures on other Worlds. Open
The search for life outside our solar system is one of the great frontiers in astronomy.Confirming life and habitability of planets will require a detailed spectroscopic analysis to search for biomarkers over a wide range of wavelengths, f…
View article: The infrared imaging spectrograph (IRIS) for TMT: electronics-cable architecture
The infrared imaging spectrograph (IRIS) for TMT: electronics-cable architecture Open
The InfraRed Imaging Spectrograph (IRIS) is a first-light instrument for the Thirty Meter Telescope (TMT). It combines a diffraction limited imager and an integral field spectrograph. This paper focuses on the electrical system of IRIS. Wi…
View article: The infrared imaging spectrograph (IRIS) for TMT: electronics-cable architecture
The infrared imaging spectrograph (IRIS) for TMT: electronics-cable architecture Open
The InfraRed Imaging Spectrograph (IRIS) is a first-light instrument for the Thirty Meter Telescope (TMT). It combines a diffraction limited imager and an integral field spectrograph. This paper focuses on the electrical system of IRIS. Wi…
View article: NFIRAOS adaptive optics for the Thirty Meter Telescope
NFIRAOS adaptive optics for the Thirty Meter Telescope Open
NFIRAOS (Narrow-Field InfraRed Adaptive Optics System) will be the first-light multi-conjugate adaptive optics system for the Thirty Meter Telescope (TMT). NFIRAOS houses all of its opto-mechanical sub-systems within an optics enclosure co…
View article: Optical design of infrared pyramid wavefront sensor for the MMT
Optical design of infrared pyramid wavefront sensor for the MMT Open
We report on the optical design of an infrared (0.85-1.8 mu m) pyramid wavefront sensor (IRPWFS) that is designed for the 6.5m MMT telescope adaptive optics system using the latest developments in low-noise infrared avalanche photodiode ar…
View article: Acquisition and Dithering with the TMT IRIS On-Instrument Wavefront Sensor System
Acquisition and Dithering with the TMT IRIS On-Instrument Wavefront Sensor System Open
IRIS is a first-light facility instrument for the TMT that operates as a client of the NFIRAOS MCAO system.IRIS is a collaboration between TMT, Caltech, the University of California, NAOJ and NRC Herzberg.IRIS contains three On-Instrument …
View article: CIArb Arbitration Practice Guidelines: An Overview
CIArb Arbitration Practice Guidelines: An Overview Open