The infrared imaging spectrograph (IRIS) for TMT: instrument overview

Larkin, James E.; Moore, Anna; Barton, Elizabeth J.; Bauman, Brian; Bui, Khanh; Canfield, John V.; Crampton, D.; Delacroix, Alex; Fletcher, Murray J.; Hale, David; Loop, David; Niehaus, Cyndie; Phillips, Andrew C.; Решетов, В. А.; Simard, Luc; Smith, Roger; Suzuki, Ryuji; Usuda, Tomonori; Wright, Shelley A.

doi:10.1117/12.856305

Cited by 16 publications

(12 citation statements)

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“…More details are presented in many other contributions to these proceedings 8,9,10,11,12,13,14,15,16 , and only a very brief summary is given here. The baseline is now the "Sequential Design" which has a number of advantages over previous designs: (1) Reduced number of optical elements, (2) natural expansion of the imaging field of view from 17′′ to 34′′, and (3) modularity of the science cryostat.…”

Section: Infrared Imaging Spectrometermentioning

confidence: 99%

Thirty Meter Telescope science instruments: a status report

et al. 2016

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An overview of the current status of the science instruments for the Thirty Meter Telescope is presented. Three first-light instruments as well as a science calibration unit for AO-assisted instruments are under development. Developing instrument collaborations that can design and build these challenging instruments remains an area of intense activity. In addition to the instruments themselves, a preliminary design for a facility cryogenic cooling system based on gaseous helium turbine expanders has been completed. This system can deliver a total of 2.4 kilowatts of cooling power at 65K to the instruments with essentially no vibrations. Finally, the process for developing future instruments beyond first light has been extensively discussed and will get under way in early 2017.

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Section: Infrared Imaging Spectrometermentioning

confidence: 99%

Thirty Meter Telescope science instruments: a status report

et al. 2016

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“…In the dominant modes where the spectral resolution is 4000, this corresponds to a 5% backpass in each individual exposure. Details of the spectral layout at the detector can be found in Larkin et al [7].…”

Section: Lenslet Arraymentioning

confidence: 99%

“…The imager and spectrograph are operated in parallel so utilizing as much of the precious 30m telescope focal plane as possible. Further details of the instrument mechanical layout and interface to the NFIRAOS Adaptive Optics system [6] for TMT can be found in Larkin et al [7]. …”

Section: Iris Layoutmentioning

confidence: 99%

Second-earth imager for TMT (SEIT): a proposal and concept Description

Matsuo

Tamura

2010

SPIE Proceedings

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The Infra-Red Imaging Spectrograph (IRIS) is one of the three first light instruments for the Thirty Meter Telescope (TMT) and is the only one to directly sample the diffraction limit. The instrument consists of a parallel imager and offaxis Integral Field Spectrograph (IFS) for optimum use of the near infrared (0.84um-2.4um) Adaptive Optics corrected focal surface. We present an overview of the IRIS spectrograph that is designed to probe a range of scientific targets from the dynamics and morphology of high-z galaxies to studying the atmospheres and surfaces of solar system objects, the latter requiring a narrow field and high Strehl performance. The IRIS spectrograph is a hybrid system consisting of two state of the art IFS technologies providing four plate scales (4mas, 9mas, 25mas, 50mas spaxel sizes). We present the design of the unique hybrid system that combines the power of a lenslet spectrograph and image slicer spectrograph in a configuration where major hardware is shared. The result is a powerful yet economical solution to what would otherwise require two separate 30m-class instruments.

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“…IRIS (InfraRed Imaging Spectrograph) 4 is currently being designed as a first light instrument to take advantage of the diffraction-limit of the future optical and infrared Thirty Meter Telescope 5 (TMT) on Mauna Kea, Hawaii. IRIS will house a near-infrared (0.84 -2.45 μm) imaging camera 6 (0.004" per pixel) and integral field spectrograph (0.004" -0.05" per element) to sample the high angular resolution achieved with TMT's narrow field infrared adaptive optics system (NFIRAOS 7 ).…”

Section: Introductionmentioning

confidence: 99%

The infrared imaging spectrograph (IRIS) for TMT: sensitivities and simulations

Wright¹,

Barton²,

Larkin³

et al. 2010

SPIE Proceedings

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We present sensitivity estimates for point and resolved astronomical sources for the current design of the InfraRed Imaging Spectrograph (IRIS) on the future Thirty Meter Telescope (TMT). IRIS, with TMT's adaptive optics system, will achieve unprecedented point source sensitivities in the near-infrared (0.84 -2.45 μm) when compared to systems on current 8-10m ground based telescopes. The IRIS imager, in 5 hours of total integration, will be able to perform a few percent photometry on 26 -29 magnitude (AB) point sources in the near-infrared broadband filters (Z, Y, J, H, K). The integral field spectrograph, with a range of scales and filters, will achieve good signal-to-noise on 22 -26 magnitude (AB) point sources with a spectral resolution of R=4,000 in 5 hours of total integration time. We also present simulated 3D IRIS data of resolved high-redshift star forming galaxies (1 < z < 5), illustrating the extraordinary potential of this instrument to probe the dynamics, assembly, and chemical abundances of galaxies in the early universe. With its finest spatial scales, IRIS will be able to study luminous, massive, high-redshift star forming galaxies (star formation rates ~ 10 -100 M yr -1 ) at ~100 pc resolution. Utilizing the coarsest spatial scales, IRIS will be able to observe fainter, less massive high-redshift galaxies, with integrated star formation rates less than 1 M yr -1 , yielding a factor of 3 to 10 gain in sensitivity compared to current integral field spectrographs. The combination of both fine and coarse spatial scales with the diffraction-limit of the TMT will significantly advance our understanding of early galaxy formation processes and their subsequent evolution into presentday galaxies.

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The infrared imaging spectrograph (IRIS) for TMT: instrument overview

Cited by 16 publications

References 1 publication

Thirty Meter Telescope science instruments: a status report

Thirty Meter Telescope science instruments: a status report

Second-earth imager for TMT (SEIT): a proposal and concept Description

The infrared imaging spectrograph (IRIS) for TMT: sensitivities and simulations

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