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Matthew Greenhouse

Matthew Greenhouse
NASA · Goddard Space Flight Centre

PhD, Astrophysics 1989

About

255
Publications
33,624
Reads
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3,518
Citations
Introduction
Matthew Greenhouse has served on the James Webb Space Telescope senior staff since 1997. He was responsible for the science instrument payload on the JWST which was delivered during 2016. He is Principle Investigator of the Next generation Micro-Shutter technology development: https://asd.gsfc.nasa.gov/ngmsa/ Bio: http://jwst.gsfc.nasa.gov/meet-greenhouse.html CV: https://jwst.nasa.gov/resources/greenhouseCV.pdf
Additional affiliations
January 1997 - present
NASA
Position
  • James Webb Space Telescope
Description
  • See: http://www.jwst.nasa.gov/meet-greenhouse.html
June 1989 - January 1996
Smithsonian Institution
Position
  • Astrophysicist

Publications

Publications (255)
Article
Full-text available
The 2013 Global Exploration Roadmap (GER), published in August, paints a dim picture for the long-term future of space astrophysics. As the astrophysics community continues their indifference to the future of the NASA human spaceflight program, this train and its resources is leaving the station without them (Figure 1). This community seems oblivio...
Conference Paper
Full-text available
The James Webb Space Telescope (JWST) is the scientific successor to the Hubble Space Telescope. It is a cryogenic infrared space observatory with a 25 m 2 aperture (6 m class) telescope that will achieve diffraction limited angular resolution at a wavelength of 2 um. The science instrument payload includes three passively cooled near-infrared inst...
Article
Full-text available
Nearly half a century has elapsed since NASA's Apollo program met its primary mission objective to land a man on the Moon and return him safely to the Earth. Today's mid-career scientists and engineers have never known a world in which human spaceflight was not a common occurrence. One might imagine that, in the 44 years since the triumph of Apollo...
Article
The Next Generation Microshutter Array (NGMSA) is an all-electrostatic actuated, programmable light transmission device used for multi-object spectroscopy. The latest NGMSA is designed to operate by applying a voltage difference between the shutter blade electrode and a single back wall electrode. We investigate the effects of different wall electr...
Preprint
Full-text available
NASA's Great Observatories have opened up the electromagnetic spectrum from space, providing sustained access to wavelengths not accessible from the ground. Together, Hubble, Compton, Chandra, and Spitzer have provided the scientific community with an agile and powerful suite of telescopes with which to attack broad scientific questions, and react...
Article
Full-text available
NASA's Great Observatories have opened up the electromagnetic spectrum from space, providing sustained access to wavelengths not accessible from the ground. Together, Hubble, Compton, Chandra, and Spitzer have provided the scientific community with an agile and powerful suite of telescopes with which to attack broad scientific questions, and react...
Article
Excess heat capacity in a bolometric detector has the consequence of increasing or leading to multiple device time constants. The Mo/Au bilayer transition edge sensor (TES) bolometric detectors initially fabricated for the high resolution mid-infrared spectrometer (HIRMES) exhibited two response thermalization scales, one of which is a few times lo...
Article
Full-text available
Next Generation Microshutter Array (NGMSA) is an electrostatically operated micro electro-mechanical system (MEMS) device for programmable spatial light filtering application. Original microshutter array (MSA), which is magnetically operated, was developed for the James Webb Space Telescope (JWST) NIRSpec multi-object spectrometer, and NGMSA inheri...
Article
After developing a magnetically actuated microshutter array sub-system, which acts as a field object selector for the James Webb Space Telescope (JWST), our team at the NASA Goddard Space Flight Center (GSFC) focused on the development of electrostatically actuated microshutter arrays - the Next Generation Microshutter Arrays (NGMSA). This letter d...
Preprint
Full-text available
Astrophotonics is the application of versatile photonic technologies to channel, manipulate, and disperse guided light from one or more telescopes to achieve scientific objectives in astronomy in an efficient and cost-effective way. The developments and demands from the telecommunication industry have driven a major boost in photonic technology and...
Article
Full-text available
Astrophotonics is the application of versatile photonic technologies to channel, manipulate, and disperse guided light from one or more telescopes to achieve scientific objectives in astronomy in an efficient and cost-effective way. The developments and demands from the telecommunication industry have driven a major boost in photonic technology and...
Preprint
Full-text available
In forthcoming decades, coverage in the wavelength regimes that are either inaccessible or compromised from the ground will be degraded as the Great Observatories and other facilities age or are decommissioned. This reduction in capability will be accompanied by a loss in the community's ability to study astrophysical phenomena at multiple waveleng...
Preprint
Full-text available
An orbiting starshade working with 30-m class ground-based telescopes would enable observations of reflected light from exoplanets at visible wavelengths. Molecular oxygen and water on an exo-Earth could be clearly detected in a 1-hour spectrum out to 7 pc, and its colors could be measured out to 17 pc. The starshade provides the needed contrast an...
Preprint
Full-text available
Executive Summary: Astrophotonics is the application of versatile photonic technologies to channel, manipulate, and disperse guided light from one or more telescopes to achieve scientific objectives in astronomy in an efficient and cost-effective way. The developments and demands from the telecommunication industry have driven a major boost in phot...
Preprint
Full-text available
The HIgh-Resolution Mid-infrarEd Spectrometer (HIRMES) is the 3rd Generation Instrument for the Stratospheric Observatory For Infrared Astronomy (SOFIA), currently in development at the NASA Goddard Space Flight Center (GSFC), and due for commissioning in 2019. By combining direct-detection Transition Edge Sensor (TES) bolometer arrays, grating-dis...
Article
Full-text available
The HIgh-Resolution Mid-infrarEd Spectrometer (HIRMES) is the 3rd Generation Instrument for the Stratospheric Observatory For Infrared Astronomy (SOFIA), currently in development at the NASA Goddard Space Flight Center (GSFC), and due for commissioning in 2019. By combining direct-detection Transition Edge Sensor (TES) bolometer arrays, grating-dis...
Conference Paper
Full-text available
The performance of astronomical observatories-sensitivity, signal-to-noise ratio, angular resolution-depends upon a high power of the telescope aperture, which has for centuries been the compelling motivation for the enormous effort put into ever-increasing telescope size. Although ground-based telescopes seem at present to be limited in aperture o...
Article
Full-text available
Near-infrared array detectors, like the \JWST NIRSpec's Teledyne's H2RGs, often provide reference pixels and a reference output. These are used to remove correlated noise. Improved Reference Sampling and Subtraction (\IRSSquare, pronounced "IRS-square") is a statistical technique for using this reference information optimally in a least squares sen...
Article
Full-text available
We present medium resolution near-infrared (NIR) spectra, covering 1.1 to 3.4 microns, of the normal Type Ia supernova (SN Ia) SN 2014J in M82 obtained with the FLITECAM instrument aboard SOFIA approximately 17-25 days after maximum B light. Our 2.8-3.4 micron spectra may be the first ~3 micron spectra of a SN Ia ever published. The spectra spannin...
Article
Full-text available
This article summarizes a workshop held on March, 2014, on the potential of the James Webb Space Telescope (JWST) to revolutionize our knowledge of the physical properties of exoplanets through transit observations. JWST's unique combination of high sensitivity and broad wavelength coverage will enable the accurate measurement of transits with high...
Article
This article summarizes a workshop held on March, 2014, on the potential of the James Webb Space Telescope (JWST) to revolutionize our knowledge of the physical properties of exoplanets through transit observations. JWST’s unique combination of high sensitivity and broad wavelength coverage will enable the accurate measurement of transits with high...
Article
Full-text available
ESA and NASA recently selected two 5 μm cutoff Teledyne H2RG sensor chip assemblies (SCA) for flight on the James Webb Space Telescope (JWST) Near Infrared Spectrograph (NIRSpec). These HgCdTe SCAs incorporate Teledyne’s “improved barrier layer” design that eliminates the degradation that affected earlier JWST H2RGs. The better indium barrier, toge...
Conference Paper
Full-text available
We describe how availability of new solar electric propulsion (SEP) technology can substantially increase the science capability of space astronomy missions working within the near-UV to far-infrared (UVOIR) spectrum by making dark sky orbits accessible for the first time. We present two case studies in which SEP is used to enable a 700 kg Explorer...
Conference Paper
Full-text available
The James Webb Space Telescope (JWST) is the scientific successor to the Hubble Space Telescope. It is a cryogenic infrared space observatory with a 25 m 2 aperture (6 m class) telescope that will achieve diffraction limited angular resolution at a wavelength of 2 um. The science instrument payload includes four passively cooled near-infrared instr...
Article
Full-text available
We describe the “overlight” test that was done for JWST’s Teledyne H2RG HgCdTe near-infrared detector arrays. We projected many very bright λ = 632.8 nm spots onto one flight representative, substrate-removed, HgCdTe 5 μm cutoff detector array. We allowed individual spots to “burn in” for as long as ≈1000 s before turning off the laser. We did not...
Conference Paper
We present principal component analysis (PCA) of a flight-representative James Webb Space Telescope Near Infrared Spectrograph (NIRSpec) Detector Subsystem. Although our results are specific to NIRSpec and its T ~ 40 K SIDECAR ASICs and 5 μm cutoff H2RG detector arrays, the underlying technical approach is more general. We describe how we measured...
Article
The Integrated Science Instrument Module (ISIM) of the James Webb Space Telescope (JWST) is the science instrument payload of the JWST. It is a 1.4 metric ton element of the JWST space vehicle that consists of four science instruments and nine instrument support systems. The flight ISIM began integration and test during 2011. This presentation will...
Conference Paper
Full-text available
The James Webb Space Telescope (JWST) is the scientific successor to the Hubble Space Telescope. It is a cryogenic infrared space observatory with a 25 m2 aperture (6 m class) telescope that will achieve diffraction limited angular resolution at a wavelength of 2 um. The science instrument payload includes three passively cooled near-infrared instr...
Conference Paper
The Integrated Science Instrument Module (ISIM) of the James Webb Space Telescope (JWST) is discussed from a systems perspective with emphasis on development status and advanced technology aspects. The ISIM is one of three elements that comprise the JWST space vehicle and is the science instrument payload of the JWST. The major subsystems of this f...
Article
Full-text available
We describe a mission architecture designed to substantially increase the science capability of the NASA Science Mission Directorate (SMD) Astrophysics Explorer Program for all AO proposers working within the near-UV to far-infrared spectrum. We have demonstrated that augmentation of Falcon 9 Explorer launch services with a 13 kW Solar Electric Pro...
Article
Full-text available
The James Webb Space Telescope (JWST) is the successor to the Hubble Space Telescope. JWST will be an infrared-optimized telescope, with an approximately 6.5 m diameter primary mirror, that is located at the Sun-Earth L2 Lagrange point. Three of JWST’s four science instruments use Teledyne HgCdTe HAWAII-2RG (H2RG) near infrared detector arrays. Dur...
Conference Paper
Full-text available
We describe an Extra-Zodiacal Explorer (EZE) mission architecture that is designed to substantially increase the science capability of the NASA SMD Astrophysics Explorer Program for all AO proposers working within the near-UV to far-infrared spectrum. We have demonstrated that augmentation of Falcon 9 Explorer launch services with a 13 kW Solar Ele...
Article
We describe a mission architecture study designed to substantially increase the potential science performance of the NASA SMD Astrophysics Explorer Program for all AO offerors working within the near-UV to far-infrared spectrum. We have demonstrated that augmentation of Falcon 9 Explorer launch services with a Solar Electric Propulsion (SEP) stage...
Conference Paper
Full-text available
The James Webb Space Telescope (JWST) is the infrared successor to the Hubble Space Telescope. It is a cryogenic infrared space observatory with a 25 m<sup>2</sup> aperture (6 m class) telescope yielding diffraction limited angular resolution at a wavelength of 2 um. The science instrument payload includes three passively cooled near-infrared instr...
Conference Paper
Full-text available
The Integrated Science Instrument Module (ISIM) of the James Webb Space Telescope (JWST) is discussed from a systems perspective with emphasis on development status and advanced technology aspects. The ISIM is one of three elements that comprise the JWST space vehicle and is the science instrument payload of the JWST. The major subsystems of this f...
Article
Full-text available
We examine the ejecta evolution of the classical nova V1065 Centauri, constructing a detailed picture of the system based on spectrophotometric observations obtained from 9 to approximately 900 days post-outburst with extensive coverage from optical to mid-infrared wavelengths. We estimate a reddening toward the system of E(B-V) = 0.5 ± 0.1, based...
Article
Full-text available
When the Stratospheric Observatory for Infrared Astronomy (SOFIA) was conceived and its first science cases defined, exoplanets had not been detected. Later studies, however, showed that optical and near-infrared photometric and spectrophotometric follow-up observations during planetary transits and eclipses are feasible with SOFIA's instrumentatio...
Conference Paper
Full-text available
The U.S./German Stratospheric Observatory for Infrared Astronomy (SOFIA), a 2.5-meter infrared airborne telescope in a Boeing 747-SP, will conduct 0.3 - 1,600 mum photometric, spectroscopic, and imaging observations from altitudes as high as 45,000 ft., where the average atmospheric transmission is greater than 80 percent. SOFIA's first light camer...
Article
Full-text available
This white paper is submitted to the Astronomy and Astrophysics 2010 Decadal Survey (Astro2010)1 Committee on the State of the Profession to emphasize the potential of the Stratospheric Observatory for Infrared Astronomy (SOFIA) to contribute to the training of instrumentalists and observers, and to related technology developments. This potential g...
Article
Full-text available
The James Webb Space Telescope (JWST) is a large (6.6 m), cold (μ m, while the mid-IR instrument will do both imaging and spectroscopy from 5.0 μ m. The JWST science goals are divided into four themes. The key objective of The End of the Dark Ages: First Light and Reionization theme is to identify the first luminous sources to form and to determine...
Conference Paper
Full-text available
The IRMOS (Infrared Multiobject Spectrometer) is a multi-object imaging dispersive spectrometer for astronomy, with a micromirror array to select desired objects. In standard operation, the mirrors are used to select multiple compact sources such that their resulting spectra do not overlap on the detector. The IRMOS can also be operated in a Hadama...
Article
Full-text available
We report 1.25 to 18 μm infrared photometry spectroscopy of the optically thin dust shell of V705 Cassiopeiae (Nova Cas 1993) between 330 and 418 days after the outburst. The measurements show that the dust shell, which had been optically thick until at least day ≈ 131, now shows the spectral signatures of optically thin astrophysical silicate grai...
Article
Full-text available
Near-Infrared spectroscopy combined with high spatial resolution imaging have been used in this work to probe the central 500 pc of M82. Imaging observations in the 2.36 μm CO band head are added to our previously published near-infrared hydrogen recombination line imaging, near-infrared broadband imaging, and 3.29 μm dust feature imaging observati...
Article
Full-text available
We report high spatial and spectral resolution [Fe II] 1.644 μm Fabry-Perot imaging observations of M82. We present extinction-corrected [Fe II] images and discuss the nature of compact [Fe II] emission regions revealed by these new data. We conclude that these [Fe II] sources trace a population of supernova remnants in M82 that are substantially o...
Article
Full-text available
New infrared images of Cep A East are presented that show two regions of shock-excited line emission from separate bipolar flows. We identify the dominant sources powering the outflows and argue that the results support a multiple outflow model (Narayanan & Walker) as opposed to a quadrupolar outflow scenario. The images include near-infrared broad...
Article
Full-text available
We present images of the cluster of embedded young stars designated NGC 7538 IRS 1, 2, and 3 in the J (1.25 μm), H (1.64 μm), and K (2.16 μm) broad bands; the 1.64 μm line of [Fe II]; the 2.12 μm and 2.25 μm lines of H2; the 2.17 μm Brackett γ H-recombination line; and the 3.29 μm "unidentified" dust feature. The NGC 7538 IRS 2 compact H II region,...