Explanipedia

Euclid preparation. LXXVII. The NISP spectroscopy channel: Ground performance and calibration Open

W. Gillard, T. Maciaszek, Éric Prieto, F. Grupp, A. Costille , et al. · 2025

ESA's Euclid cosmology mission relies on the very sensitive and accurately calibrated spectroscopy channel of the Near-Infrared Spectrometer and Photometer (NISP). With three operational grisms in two wavelength intervals, NISP provides di…

Euclid: the potential of slitless infrared spectroscopy: a z = 5.4 quasar and new ultracool dwarfs Open

Eduardo Bañados, V. Le Brun, S. Belladitta, Ivelina Momcheva, Daniel Stern , et al. · 2025

We demonstrate the potential of Euclid ’s slitless spectroscopy to discover high-redshift ($z>5$) quasars and their main photometric contaminant, ultracool dwarfs. Sensitive infrared spectroscopy from space is able to efficiently identi…

Euclid preparation. Overview of Euclid infrared detector performance from ground tests Open

B. Kubik, R. Barbier, J. D. Clemens, S Ferriol, A. Secroun , et al. · 2025

The paper describes the objectives, design and findings of the pre-launch ground characterisation campaigns of the Euclid infrared detectors. The pixel properties, including baseline, bad pixels, quantum efficiency, inter pixel capacitance…

Euclid preparation: The NISP spectroscopy channel, on ground performance and calibration Open

W. Gillard, T. Maciaszek, E Prieto, F Grupp, A. Costille , et al. · 2025

ESA's Euclid cosmology mission relies on the very sensitive and accurately calibrated spectroscopy channel of the Near-Infrared Spectrometer and Photometer (NISP). With three operational grisms in two wavelength intervals, NISP provides di…

Euclid Open

K. Jahnkę, W. Gillard, M. Schirmer, A. Ealet, T. Maciaszek , et al. · 2024

The Near-Infrared Spectrometer and Photometer (NISP) on board the Euclid satellite provides multiband photometry and R ≳ 450 slitless grism spectroscopy in the 950–2020 nm wavelength range. In this reference article, we illuminate the back…

Design and challenges for the HARMONI Laser Guide Star Sensors Open

A. Costille, Edgard Renault, Anne Bonnefoi, William Ceria, Kjetil Dohlen , et al. · 2023

HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. It covers a large spectral range from 450nm to 2450nm with resolving powers from 3500 to 18000 and spatial sampling from 60mas to 4mas. It can operate …

Euclid near infrared spectrometer and photometer instrument flight model presentation, performance, and ground calibration results summary Open

T. Maciaszek, Anne ealet, W. Gillard, K. Jahnkę, R. Barbier , et al. · 2022

The NISP (Near Infrared Spectrometer and Photometer) is one of the two Euclid\ninstruments. It operates in the near-IR spectral region (950-2020nm) as a\nphotometer and spectrometer. The instrument is composed of: a cold (135 K)\noptomecha…

HARMONI at ELT: designing a laser guide star wavefront sensors for the ELT Open

A. Costille, Anne Bonnefoi, Edgard Renault, William Ceria, Kjetil Dohlen , et al. · 2022

HARMONI is the first light visible and near-IR integral field spectrograph for the ELT covering a large spectral range from 450nm to 2450nm with resolving powers from 3500 to 18000 and spatial sampling from 60mas to 4mas. It can operate in…

A story of errors and bias: The optimization of the LGS WFS for HARMONI Open

Thierry Fusco, Benoît Neichel, Carlos Correia, Léonardo Blanco, A. Costille , et al. · 2019

International audience

Euclid Near Infrared Spectrometer and Photometer instrument concept and first test results obtained for different breadboards models at the end of phase C Open

T. Maciaszek, Anne Ealet, K. Jahnkę, Éric Prieto, R. Barbier , et al. · 2016

The Euclid mission objective is to understand why the expansion of the Universe is accelerating through by mapping the geometry of the dark Universe by investigating the distance-redshift relationship and tracing the evolution of cosmic st…

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