MIRADAS for the Gran Telescopio Canarias

Eikenberry, S. S.; Raines, S. N.; Stelter, R. Deno; Garner, Alan; Dallilar, Y.; Ackley, K.; Bennett, John G.; Murphey, Charles H.; Miller, Paola; Tooke, David; Williams, L.; Chinn, Brian; Mullin, Scott A.; Schofield, Sidney; Warner, C.; Városi, F.; Zhao, Bo; Eikenberry, Sophia A.; Vega, Claudia; Donoso, H. Veronica; Sabater, Josep; Gómez, José María; Torra, J.; Minguell, Josefina Rosich; López, Francisco Garzón; Cardiel, N.; Gallego, J.; Marín-Franch, A.; Galipienzo, Julio; Astigarraga, Miguel Ángel Carrera; Fitzgerald, Greg; Prees, Ian; Stolberg, Todd M.; Kornik, Peter A.; Ramaprakash, A. N.; Burse, Mahesh; Punnadi, Sujit; Hammersley, P. L.

doi:10.1117/12.2232533

“…One of the other techniques for building IFUs is to use slicing optics. Advanced image slicers [46][47][48] use powered optics machined out of monolithic blocks of metal to geometrically rearrange a 2-dimensional field of view into a linear pseudo-slit, which is then be dispersed by a spectrograph. The lenslet IFU has significantly looser specifications on the spectrograph optics because a lenslet array destroys the spatial information otherwise preserved by the slicing optics, which would otherwise be forced by the spectrograph optics to preserve all the way to the detector.…”

Section: Slenslitmentioning

confidence: 99%

Update on the preliminary design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy

Stelter

¹

,

Skemer

²

,

Sallum

³

et al. 2020

Ground-Based and Airborne Instrumentation for Astronomy VIII

View full text Add to dashboard Cite

SCALES (Santa Cruz Array of Lenslets for Exoplanet Spectroscopy) is a 2-5 micron high-contrast lenslet integralfield spectrograph (IFS) driven by exoplanet characterization science requirements and will operate at W. M. Keck Observatory. Its fully cryogenic optical train uses a custom silicon lenslet array, selectable coronagraphs, and dispersive prisms to carry out integral field spectroscopy over a 2.2 arcsec field of view at Keck with low (< 300) spectral resolution. A small, dedicated section of the lenslet array feeds an image slicer module that allows for medium spectral resolution (5000 − 10000), which has not been available at the diffraction limit with a coronagraphic instrument before. Unlike previous IFS exoplanet instruments, SCALES is capable of characterizing cold exoplanet and brown dwarf atmospheres (< 600 K) at bandpasses where these bodies emit most of their radiation while capturing relevant molecular spectral features.

show abstract

“…One of the other techniques for building IFUs is to use slicing optics. Advanced image slicers [46][47][48] use powered optics machined out of monolithic blocks of metal to geometrically rearrange a 2-dimensional field of view into a linear pseudo-slit, which is then be dispersed by a spectrograph. The lenslet IFU has significantly looser specifications on the spectrograph optics because a lenslet array destroys the spatial information otherwise preserved by the slicing optics, which would otherwise be forced by the spectrograph optics to preserve all the way to the detector.…”

Section: Slenslitmentioning

confidence: 99%

Update on the Preliminary Design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy

Stelter¹,

Skemer²,

Sallum³

et al. 2020

Preprint

0

View full text Add to dashboard Cite

SCALES (Santa Cruz Array of Lenslets for Exoplanet Spectroscopy) is a 2-5 micron high-contrast lenslet integralfield spectrograph (IFS) driven by exoplanet characterization science requirements and will operate at W. M. Keck Observatory. Its fully cryogenic optical train uses a custom silicon lenslet array, selectable coronagraphs, and dispersive prisms to carry out integral field spectroscopy over a 2.2 arcsec field of view at Keck with low (< 300) spectral resolution. A small, dedicated section of the lenslet array feeds an image slicer module that allows for medium spectral resolution (5000 − 10000), which has not been available at the diffraction limit with a coronagraphic instrument before. Unlike previous IFS exoplanet instruments, SCALES is capable of characterizing cold exoplanet and brown dwarf atmospheres (< 600 K) at bandpasses where these bodies emit most of their radiation while capturing relevant molecular spectral features.

show abstract

“…6 The situation from 2020 onwards is less clear at the moment, due to the arrival of MIRADAS at the GTC. 7 We are planning on making two enhancements to HiPERCAM during the coming year. The first is to modify the CCD preamp boards so that it is possible to switch the bandwidth from the current value of 1.06 MHz 2 to approximately half this value.…”

Section: Future Plansmentioning

confidence: 99%

First light with HiPERCAM on the GTC

Dhillon

¹

,

Dixon

²

,

Gamble

³

et al. 2018

Ground-Based and Airborne Instrumentation for Astronomy VII

View full text Add to dashboard Cite

HiPERCAM is a quintuple-beam imager that saw first light on the 4.2 m William Herschel Telescope (WHT) in October 2017 and on the 10.4 m Gran Telescopio Canarias (GTC) in February 2018. The instrument uses reimaging optics and 4 dichroic beamsplitters to record ugriz (300-1000 nm) images simultaneously on its five CCD cameras. The detectors in HiPERCAM are frame-transfer devices cooled thermo-electrically to −90 • C, thereby allowing both long-exposure, deep imaging of faint targets, as well as high-speed (over 1000 windowed frames per second) imaging of rapidly varying targets. In this paper, we report on the as-built design of HiPERCAM, its first-light performance on the GTC, and some of the planned future enhancements.

show abstract

MIRADAS for the Gran Telescopio Canarias

Cited by 5 publications

References 3 publications

Update on the preliminary design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy

Update on the preliminary design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy

Update on the Preliminary Design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy

First light with HiPERCAM on the GTC

Contact Info

Product

Resources

About