HARMONI: the first light integral field spectrograph for the E-ELT

Thatte, Niranjan; Clarke, Fraser; Bryson, Ian; Schnetler, Hermine; Tecza, Matthias; Bacon, Roland; Remillieux, A.; Mediavilla, E.; Linares, José Miguel Herreros; Arribas, S.; Evans, Christopher J.; Lunney, D.; Fusco, Thierry; O’Brien, Kieran; Tosh, Ian; Ives, Derek; Finger, Gert; Houghton, R. C. W.; Davies, Roger L.; Lynn, J.; Allen, Jamie R.; Zieleniewski, Simon; Kendrew, Sarah; Ferraro-Wood, Vanessa; Pécontal-Rousset, Arlette; Kosmalski, Johan; Richard, Johan; Jarno, Aurélien; Gallie, Angus; Montgomery, David; Henry, David; Zins, G.; Freeman, David E.; García-Lorenzo, B.; Rodríguez-Ramos, L. F.; Revuelta, Jorge Sánchez Capuchino; Suárez, Elvio Hernández; Bueno-Bueno, Alberto; Gigante-Ripoll, José Vincente; Garcia, Adolfo; Dohlen, Kjetil; Neichel, Benoît

doi:10.1117/12.2055436

Cited by 22 publications

(18 citation statements)

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“…The High Angular Resolution Monolithic Optical and Nearinfrared Integral field spectrograph 5 (HARMONI, PI: N. A. Thatte, Thatte et al 2014) will be the integral field spectrograph (IFS) at the ESO Extremely Large Telescope 6 (ELT). HARMONI will be available with different flavors of Adaptive Optics (AO) systems.…”

Section: Optical and Near-infrared Observations With Elt/harmonimentioning

confidence: 99%

Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

Augustin

Quiret

Milliard

et al. 2019

Monthly Notices of the Royal Astronomical Society

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We simulate the flux emitted from galaxy halos in order to quantify the brightness of the circumgalactic medium (CGM). We use dedicated zoom-in cosmological simulations with the hydrodynamical Adaptive Mesh Refinement code RAMSES, which are evolved down to z=0 and reach a maximum spatial resolution of 380 h −1 pc and a gas mass resolution up to 1.8×10 5 h −1 M in the densest regions. We compute the expected emission from the gas in the CGM using CLOUDY emissivity models for different lines (e.g. Lyα, CIV, OVI, CVI, OVIII) considering UV background fluorescence, gravitational cooling and continuum emission. In the case of Lyα we additionally consider the scattering of continuum photons. We compare our predictions to current observations and find them to be in good agreement at any redshift after adjusting the Lyα escape fraction. We combine our mock observations with instrument models for FIREBall-2 (UV balloon spectrograph) and HARMONI (visible and NIR IFU on the ELT) to predict CGM observations with either instrument and optimise target selections and observing strategies. Our results show that Lyα emission from the CGM at a redshift of 0.7 will be observable with FIREBall-2 for bright galaxies (NUV∼18 mag), while metal lines like OVI and CIV will remain challenging to detect. HARMONI is found to be well suited to study the CGM at different redshifts with various tracers.

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Section: Optical and Near-infrared Observations With Elt/harmonimentioning

confidence: 99%

Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

Augustin

Quiret

Milliard

et al. 2019

Monthly Notices of the Royal Astronomical Society

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“…is being targeted for the ELT first light instrument HAR-MONI (Thatte et al 2014) SCAO mode (Schwartz et al 2018). Figures 8 and 7 show the latency scaling of both the SH-WFS RTC and Pyr-WFS RTC against sub-apertures/pixels across the pupil.…”

Section: Up To Date Scao Results With Camera Simulatormentioning

confidence: 99%

A many-core CPU prototype of an MCAO and LTAO RTC for ELT-scale instruments

Jenkins

Basden

Myers

2019

Monthly Notices of the Royal Astronomical Society

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We propose a many-core CPU architecture for Extremely Large Telescope (ELT) scale adaptive optics (AO) real-time control (RTC) for the multi-conjugate AO (MCAO) and laser-tomographic AO (LTAO) modes. MCAO and LTAO differ from the more conventional single-conjugate (SCAO) mode by requiring more wavefront sensor (WFS) measurements and more deformable mirrors to achieve a wider field of correction, further increasing the computational requirements of ELT-scale AO. We demonstrate results of our CPU based AO RTC operating firstly in SCAO mode, using either Shack-Hartmann or Pyramid style WFS processing, and then in MCAO mode and in LTAO mode using the specifications of the proposed ELT instruments, MAORY and HARMONI. All results are gathered using a CPU based camera simulator utilising UDP packets to better demonstrate the pixel streaming and pipe-lining of the RTC software. We demonstrate the effects of switching parameters, streaming telemetry and implicit pseudo open-loop control (POLC) computation on the MCAO and LTAO modes. We achieve results of < 600µs latency with an ELT scale SCAO setup using Shack-Hartman processing and < 800µs latency with SCAO Pyramid WFS processing. We show that our MCAO and LTAO many core CPU architecture can achieve full system latencies of < 1000µs with jitters < 40µs RMS. We find that a CPU based AO RTC architecture has a good combination of performance, flexibility and maintainability for ELT-scale AO systems.

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“…The demand for near-infrared sensitive pixels is therefore very high. The HARMONI [4] integral field spectrograph combines broad wavelength coverage in a single exposure with high spatial sampling; 128x256 spaxels each either at 40mas (for extended sources and optimal FoV), 20mas (for optimal sensitivity), 10mas (for best combination), or 4mas (for highest spatial resolution). Such "3D" observations, even over a modest field of view, lead to similarly demanding requirements on the detector systems.…”

Section: Scientific Detector Requirementsmentioning

confidence: 99%

“…The package contains an integral Peltier that cools the CCD below -45°C to achieve < 0.05 e-/pix/frame total dark current at 100fps. 4 The CCD220 is encapsulated in a 64 pin package (right in Figure 10) with a custom-designed integral Peltier cooler that cools the CCD below -45°C to achieve dark currents < 0.05 e-/pix/frame (at 100fps).…”

Section: E2v Ccd220mentioning

confidence: 99%

Detector developments at ESO to prepare for the E-ELT era

Downing¹,

Finger²,

Ives³

et al. 2014

SPIE Proceedings

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ESO has a very active on-going detector development program to not only meet the needs of the current crop of instruments for the VLT, but is also actively involved in gathering requirements and developing detectors for the challenging instruments being proposed and in design for the E-ELT. This paper provides an overall summary of the detector requirements of the various E-ELT instruments and the many interesting detector developments ESO is involved in to meet these needs. Most of these instruments and detector developments are described in more detail in other papers at this conference.

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HARMONI: the first light integral field spectrograph for the E-ELT

Cited by 22 publications

References 0 publications

Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

Emission from the circumgalactic medium: from cosmological zoom-in simulations to multiwavelength observables

A many-core CPU prototype of an MCAO and LTAO RTC for ELT-scale instruments

Detector developments at ESO to prepare for the E-ELT era

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