Faint-object spectrograph for Space Telescope

Details Faint-object spectrograph for Space Telescope Faint-object spectrograph for Space Telescope

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979spie..183...74h&link_type=abstract

In: Space optics; Proceedings of the Seminar, Huntsville, Ala., May 22-24, 1979. (A80-17432 05-89) Bellingham, Wash., Society of

Astronomy and Astrophysics

Astronomy

6

Hubble Space Telescope, Optical Equipment, Spaceborne Astronomy, Spectrographs, Active Galaxies, Calibrating, Data Systems, Electric Power Supplies, Gratings (Spectra), Photometers, Signal Processing, Spectral Resolution

Scientific paper

The paper presents the Faint Object Spectrograph (FOS) for the Space Telescope to provide a digitized spectra of faint astronomical objects over the 115 to 700 nm wavelength range at resolving powers of 1000 and 100. A variety of concave gratings and prisms is employed to form nearly stigmatic spectra on one of the two Digicon photon counting detectors which are optimized for two different but overlapping ranges. The scientific goals associated with quasars, active galaxies, and objects within our solar system are discussed, and the FOS optical design features, including detectors, electronics, signal processing, power supplies, and data handling are examined. The FOS structural system, mechanism, and controls are described, along with the predicted performance capabilities in the spectral and spectropolarimetry modes. Finally, system performance parameters, including spatial resolution, time resolution, noise, and efficiency are discussed.

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