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STScI will be down completely for electrical work from 2:00 PM Friday, 2 December – 6:00 AM Monday, 5 December, 2016. Mail will be queued and delivered after the work is completed, but there may be a delay. DADS and data processing won't be up until some time Monday morning. Our apologies for the inconvenience.

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Tübingen Echelle Spectrograph

The Tübingen Echelle Spectrograph (TUES), designed and managed at the University of Tübingen, flew on the Orbiting and Retrievable Far and Extreme Ultraviolet Spectrograph (ORFEUS)-SPAS II space shuttle mission in 1996, returning spectra in the 900 Å to 1400 Å wavelength range. The instrument was designed to achieve a spectral resolution of $\lambda$/$\Delta$$\lambda$=10000 when used with an entrance aperture of 10" diameter. During the 17.7 day flight, TUES returned 239 spectra of 62 targets.

Map of TUES observations



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