The design of ERIS for the VLT

Amico, Paola; Marchetti, Enrico; Pedichini, Fernando; Baruffolo, A.; Délabre, Bernard; Duchateau, M.; Ekinci, Mustafa; Fantinel, D.; Fedrigo, Enrico; Finger, Gert; Frank, Christoph; Hofmann, R.; Jolley, Paul; Lizon, Jean Louis; Louarn, Miska Le; Madec, Pierre-Yves; Soenke, C.; Weisz, Harald

doi:10.1117/12.925170

Cited by 10 publications

(7 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Enhanced Resolution Imager and Spectrograph (ERIS) will be installed in the Cassegrain focus of UT4 at the Very Large Telescope in the near future [85,86]. ERIS is a 1-5 m instrument with an imager (NIX) operating from -band and an IFS (SPIFFIER) in -band with R∼8000.…”

Section: Vlt/erismentioning

confidence: 99%

Vector-apodizing phase plate coronagraph: design, current performance, and future development [Invited]

et al. 2021

View full text Add to dashboard Cite

Over the last decade, the vector-apodizing phase plate (vAPP) coronagraph has been developed from concept to on-sky application in many high-contrast imaging systems on 8-m class telescopes. The vAPP is an geometric-phase patterned coronagraph that is inherently broadband, and its manufacturing is enabled only by direct-write technology for liquid-crystal patterns. The vAPP generates two coronagraphic PSFs that cancel starlight on opposite sides of the point spread function (PSF) and have opposite circular polarization states. The efficiency, that is the amount of light in these PSFs, depends on the retardance offset from half-wave of the liquid-crystal retarder. Using different liquid-crystal recipes to tune the retardance, different vAPPs operate with high efficiencies (> 96%) in the visible and thermal infrared (0.55 µm to 5 µm). Since 2015, seven vAPPs have been installed in a total of six different instruments, including Magellan/MagAO, Magellan/MagAO-X, Subaru/SCExAO, and LBT/LMIRcam. Using two integral field spectrographs installed on the latter two instruments, these vAPPs can provide lowresolution spectra (R∼30) between 1 m and 5 m. We review the design process, development, commissioning, on-sky performance, and first scientific results of all commissioned vAPPs. We report on the lessons learned and conclude with perspectives for future developments and applications.

show abstract

Section: Vlt/erismentioning

confidence: 99%

Vector-apodizing phase plate coronagraph: design, current performance, and future development [Invited]

et al. 2021

View full text Add to dashboard Cite

show abstract

“…11 The second and third were 2.5µm and 5.3µm devices delivered in 2018 and destined for the ERIS project. 12 The test cryostat was capable of cooling to 37K. The long-wavelength detectors were operated at 40K to reduce dark current and improve cosmetics.…”

Section: Trap Characterizationmentioning

confidence: 99%

Predictive model of persistence in H2RG detectors

Tulloch¹,

George²

2019

J. Astron. Telesc. Instrum. Syst.

View full text Add to dashboard Cite

Infrared hybridized detectors are widely used in astronomy, and their performance can be degraded by image persistence. This results in remnant images that can persist in the detector for many hours, contaminating any subsequent low-background observations. A different but related problem is reciprocity failure whereby the detector is less sensitive to low flux observations. It is demonstrated that both of these problems can be explained by trapping and detrapping currents that move charge back and forward across the depletion region boundary of the photodiodes within each pixel. These traps have been characterized in one 2.5 µm and two 5.3 µm cutoff wavelength Teledyne H2RG detectors. We have developed a behaviour model of these traps using a 5-pole Infinite Impulse Response digital filter. This model allows the trapped charge in a detector to be constantly calculated for arbitrary exposure histories, providing a near real-time correction for image persistence.

show abstract

“…ERIS is the next-generation AO near-IR imager and spectrograph for the Cassegrain focus of the VLT UT4, and will use the Adaptive Optics Facility (AOF). 3,4 The ERIS instrument is made up of an adaptive optics module (ERIS-AO), a J-M band diffraction limited imager (NIX), a calibration unit (CU) and SPIFFIER. We briefly give an update of the ERIS project as it currently stands.…”

Section: Planned Upgrades For Erismentioning

confidence: 99%

Making SPIFFI SPIFFIER: upgrade of the SPIFFI instrument for use in ERIS and performance analysis from re-commissioning

George¹,

Gräff²,

Feuchtgruber³

et al. 2016

SPIE Proceedings

Self Cite

View full text Add to dashboard Cite

SPIFFI is an AO-fed integral field spectrograph operating as part of SINFONI on the VLT, which will be upgraded and reused as SPIFFIER in the new VLT instrument ERIS. In January 2016, we used new technology developments to perform an early upgrade to optical subsystems in the SPIFFI instrument so ongoing scientific programs can make use of enhanced performance before ERIS arrives in 2020. We report on the upgraded components and the performance of SPIFFI after the upgrade, including gains in throughput and spatial and spectral resolution. We show results from re-commissioning, highlighting the potential for scientific programs to use the capabilities of the upgraded SPIFFI. Finally, we discuss the additional upgrades for SPIFFIER which will be implemented before it is integrated into ERIS.

show abstract

The design of ERIS for the VLT

Cited by 10 publications

References 2 publications

Vector-apodizing phase plate coronagraph: design, current performance, and future development [Invited]

Vector-apodizing phase plate coronagraph: design, current performance, and future development [Invited]

Predictive model of persistence in H2RG detectors

Making SPIFFI SPIFFIER: upgrade of the SPIFFI instrument for use in ERIS and performance analysis from re-commissioning

Contact Info

Product

Resources

About