The sixteen to forty micron spectroscopy from the NASA Lear jet

Astronomy and Astrophysics – Astronomy

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Astronomical Spectroscopy, Infrared Spectrometers, Lear Jet Aircraft, Spectral Resolution, Apertures, H Ii Regions, Interference Grating, Jupiter (Planet), Orion Nebula, Stellar Spectra, Venus (Planet)

Scientific paper

Two cryogenically cooled infrared grating spectrometers were designed, fabricated and used on the NASA Lear Jet Observatory. The first spectrometer was used to measure continuum sources such as dust in H II regions, the galactic center and the thermal emission from Mars, Jupiter, Saturn, and Venus over the 16 to 40 micron spectral range. The second spectrometer had higher resolution and was used to measure ionic spectral lines in H II regions (S III at 18.7 microns). It was later used extensively on NASA C-141 Observatory to make observations of numerous objects including H II regions, planetary nebulae, stars with circumstellar shells, the galactic center and extragalactic objects. The spectrometers are described including the major innovations and a list of the scientific contributions.

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