CETUS science capabilities enabled by the CETUS NUV multi-object spectrometer and NUV/FUV camera
Abstract
The Cosmic Evolution Through UV Spectroscopy (CETUS) concept has three ultraviolet instruments to achieve its science goals. This presentation highlights the features of the NUV multi-object spectrometer (MOS) and the NUV/FUV camera which operate simultaneously with their separate field of views. The NUV MOS can target up to 100 objects at a time without being confused by nearby sources or background zodiacal light. This multiplexing will allow over 100,000 galaxies to be observed over a typical mission lifetime. The MOS includes a next-generation micro-shutter array, an efficient aspheric Offner-like spectrometer design with a convex grating, and nanotube light traps for suppressing unwanted wavelengths. The UV Camera has the capability to image from the FUV to the NUV at the same time the MOS is operating at 180-350 nm. The UV Camera has a similar Offner-like relay, fixed filters, and two separate detectors to optimize observing in either the far-UV (>Lyman-alpha filter) or the near-UV (LF256W filter centered at 256.4 nm with FWHM 40.6 nm) utilizing a sealed CsI solar blind micro-channel plate (MCP) and a 4Kx4K CCD respectively. Both instruments have a tip/tilt/focus mechanism on one of their optics allowing independent focus correction and dithering of the image at the focal plane.
- Publication:
-
American Astronomical Society Meeting Abstracts #233
- Pub Date:
- January 2019
- Bibcode:
- 2019AAS...23315737K