A High Sensitivity Ultraviolet Spectrograph for the THEIA Mission

Details A High Sensitivity Ultraviolet Spectrograph for the THEIA Mission A High Sensitivity Ultraviolet Spectrograph for the THEIA Mission

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21345801s&link_type=abstract

American Astronomical Society, AAS Meeting #213, #458.01; Bulletin of the American Astronomical Society, Vol. 41, p.361

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present the layout and performance specifications for the high sensitivity ultraviolet spectrograph (UVS) designed for the THEIA mission. Designed to revolutionize absorption-line spectroscopy in the 100-300 nm wavelength range, UVS will perform medium resolution (R 30,000) and high-resolution (R 100,000) observations of objects ranging from distant quasars to planets around nearby stars. Among its many science objectives, UVS will determine the baryonic content, ionization, and distribution of the intergalactic medium with sensitivities and cosmic volume grasp orders of magnitude larger than those of previous observatories. We are presently conducting an Astrophysics Strategic Mission Concept Study that is focusing on key technology development areas needed to enable UVS and other high performance spectrographs within the next decade. These include ultraviolet detector quantum efficiency and format, optimization of optical coatings, grating efficiency and aberration correction, and optical design. The UVS design and study results will serve as inputs into NASA's strategic planning process.

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