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Instrument Concepts

Instrument Concepts. History. GMT instrument conceptual design studies – 2005 Internal to GMT consortium (at that time) GMT conceptual design review – February 2006 Subsequent work by project, with partner participation: Integration of seeing-limited instruments

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Instrument Concepts

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  1. Instrument Concepts Science with Giant Telescopes - Jun 15-18, 2008

  2. History GMT instrument conceptual design studies – 2005 Internal to GMT consortium (at that time) GMT conceptual design review – February 2006 Subsequent work by project, with partner participation: Integration of seeing-limited instruments Reconfiguration of instrument platform AO relay Meetings: Seeing-limited instruments workshop Adaptive optics workshop Planet RV workshop Science with GMT (Canberra) – March 2008 Before proceeding, need to resolve instrument-AO interface Science with Giant Telescopes - Jun 15-18, 2008

  3. GMT Instrument Design Studies • Request letters of intent (e.g. Sep 2008) • Select list for design studies (~ 6?) (Nov 2008) • Request for proposals released • for each instrument (Jan 2009) • Proposals due (Mar 2009) • Award contracts for design studies (May 2009) • Negotiate study contracts, • contract start (Jul 2009) • Finish design studies and review (Dec 2010) • Select first light instruments, • start instrument development (2011) Science with Giant Telescopes - Jun 15-18, 2008

  4. Some Issues Intention of design studies is to form actual instrument teams – across (and beyond) partner institutions Design study funding: project $ in-kind (probably not telescope time – too sensitive) Evaluation: Internal – hard to avoid some conflicts External Science with Giant Telescopes - Jun 15-18, 2008

  5. Science with Giant Telescopes - Jun 15-18, 2008

  6. GMACS • Multi-object, multi-slit spectrograph • 4x spectrographs, each with • red and blue arms, VPH gratings • Field of view: 8 x 18 arcmin • Wavelength range 0.36 – 1.02 μm • Collimated beam diameter: 300 mm • Resolving power w/ 0.7 arcsec slit: • R ~ 1400 in blue • R ~ 2700 in red • (for accurate sky subtraction) • cross-over at 6500 Å • Separate 8 x 9 arcmin imaging • channel Science with Giant Telescopes - Jun 15-18, 2008

  7. GMACS – Optical Layout x4 Science with Giant Telescopes - Jun 15-18, 2008

  8. NIRMOS • Wavelength range: 0.85 – 2.5 μm • Imaging Mode: • 7 x 7 arcmin field of view • 0.067 arcsec/pixel • 6kx6k detector • Spectroscopy Mode: • Multi-slits: 140 x 3 arcsec long, full wavelength coverage • 5 x 7 arcmin field of view • R ~ 3000 with 0.5 arcsec slits • Augmented by GLAO Science with Giant Telescopes - Jun 15-18, 2008

  9. GMACS, NIRMOS & MIISE Science with Giant Telescopes - Jun 15-18, 2008

  10. Red: 536 to 734 nm NIR: 723 to 1072 nm 1 m Blue: 383 to 545 nm UV: 299 to 389 nm QSpec • Four beam instrument • 450 mm beam diameter • R4 echelle gratings (x2): • 200 x 1600 mm • Rφ = 30,000 arcsecs • λλ = 300 nm to 1.07 µm • (in four channels) • 2-pix resolution: R=125,000 • Pupil anamorphism • White pupil design • VPH grating cross-dispersion • Four catadioptric cameras • 4k x 6.5k to 6k x 8k CCDs • (15 µm pixels) Science with Giant Telescopes - Jun 15-18, 2008

  11. SHARPS • Planet Doppler spectroscopy • Fiber-fed: 7x(obj,sky,cal) x 1.0”  • Resolving power ~ 150,000 • Wavelength: > 4400 – 6700 Å • White pupil spectrograph design • CCD mosaic detector • Deep depletion CCDs for red orders • Vacuum-enclosed spectrograph • High-stability thermal environment • Bulky enclosure Science with Giant Telescopes - Jun 15-18, 2008

  12. MIISE – Mid-IR Imaging Spectrometer • Wavelength range: 3 - 25 μm • Field of view: 30 – 40 arcsec • Resolving power: R ~ 1500 • Modes: • Imaging • Spectroscopy • Nulling (8-25 μm) • Coronography (3-5 μm) • Short wavelength channel: 3-5μ, • 0.010 arcsec/pixel • Long wavelength channel: 8-25μ, • 0.030 arcsec/pixel 3-5 μm detector 8-25 μm detector input from AO feed dichroic nulling channel 2 micron phase sensor long wavelength imaging channel Science with Giant Telescopes - Jun 15-18, 2008

  13. GMTIFS – GMT Integral Field Spectrograph • Single-object, AO-corrected, integral-field spectroscopy • Wavelength range: 1.0 – 2.5 μm • Resolving power: 4000 – 5000 • Range of spatial sampling and fields of view: • Galaxy dynamics: 0.05-0.10 arcsec sampling, 2-3 arcsec FOV • Black hole masses: Diffraction-limited sampling, small FOV Tel focus F-converter slicer fold collimator detector grating camera Science with Giant Telescopes - Jun 15-18, 2008

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