5 September 2017 Optical design for CETUS: a wide-field 1.5m aperture UV payload being studied for a NASA probe class mission study
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Abstract
We are developing a NASA Headquarters selected Probe-class mission concept called the Cosmic Evolution Through UV Spectroscopy (CETUS) mission, which includes a 1.5-m aperture diameter large field-of-view (FOV) telescope optimized for UV imaging, multi-object spectroscopy, and point-source spectroscopy. The optical system includes a Three Mirror Anastigmatic (TMA) telescope that simultaneously feeds three separate scientific instruments: the near-UV (NUV) Multi-Object Spectrograph (MOS) with a next-generation Micro-Shutter Array (MSA); the two-channel camera covering the far-UV (FUV) and NUV spectrum; and the point-source spectrograph covering the FUV and NUV region with selectable R~ 40,000 echelle modes and R~ 2,000 first order modes. The optical system includes fine guidance sensors, wavefront sensing, and spectral and flat-field in-flight calibration sources. This paper will describe the current optical design of CETUS.
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Robert A. Woodruff, Robert A. Woodruff, Tony Hull, Tony Hull, Sara R. Heap, Sara R. Heap, William Danchi, William Danchi, Stephen E. Kendrick, Stephen E. Kendrick, Lloyd Purves, Lloyd Purves, } "Optical design for CETUS: a wide-field 1.5m aperture UV payload being studied for a NASA probe class mission study", Proc. SPIE 10401, Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems, 104011P (5 September 2017); doi: 10.1117/12.2286680; https://doi.org/10.1117/12.2286680
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