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20 June 2000 EXES: a progress report on the development of a high-resolution mid-infrared grating spectrograph for SOFIA
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Abstract
We are developing a high spectral resolution grating spectrograph as a PI instrument for the Stratospheric Observatory for Infrared Astronomy. The Echelon-Cross- Echelle Spectrograph (EXES) will operate at 5.5 - 28.5 micrometers in three spectroscopic modes: R approximately 105, 2 X 104, and 4000. We use an echelon, a coarsely ruled, steeply blazed diffraction grating to achieve high resolution. Cross-dispersion is done with an echelle used at relatively low order. The detector is a 256 X 256 pixel Si:As IBC array. A very similar instrument, the Texas Echelon-Cross-Echelle Spectrograph (TEXES), has had a successful telescope run at the McDonald Observatory. We give here a progress report on the design of EXES and the status of TEXES.
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Matthew J. Richter, John H. Lacy, Daniel T. Jaffe, Thomas K. Greathouse, and Mary Kay Hemenway "EXES: a progress report on the development of a high-resolution mid-infrared grating spectrograph for SOFIA", Proc. SPIE 4014, Airborne Telescope Systems, (20 June 2000); https://doi.org/10.1117/12.389133
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