EXES: a progress report on the development of a high-resolution mid-infrared grating spectrograph for SOFIA
| Autor: | Matthew J. Richter, Mary Kay Hemenway, D. T. Jaffe, Thomas K. Greathouse, John H. Lacy |
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| Rok vydání: | 2000 |
| Předmět: |
Physics
Infrared astronomy Infrared Star formation Astrophysics::Instrumentation and Methods for Astrophysics Astronomy Astrophysics::Cosmology and Extragalactic Astrophysics Grating law.invention Telescope law Observatory Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Spectral resolution Spectrograph Astrophysics::Galaxy Astrophysics |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.389133 |
| Popis: | We are developing a high spectral resolution grating spectrograph as a PT instrument for the Stratospheric Observa-tory for Infrared Astronomy (SOFIA). The Echelon-Cross-Echelle Spectrograph (EXES) will operate at 5.5-28.5 pm in three spectroscopic modes: R iO, 2 x i04, and 4000. We use an echelon, a coarsely ruled, steeply blazeddiffraction 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-EchelleSpectrograph (TEXES), has had a successful telescope run at the McDonald Observatory. We give here a progressreport on the design of EXES and the status of TEXES.Keywords: Infrared, Spectrograph, SOFIA 1. INTRODUCTION Molecules provide the best tracers of the changes in density, temperature, bulk velocity, and chemical state asdiffuse clouds become stars with disks and planets. Our current picture of star formation has benefited greatly |
| Databáze: | OpenAIRE |
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