Faint-object spectrograph for Space TelescopeThe 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.
Document ID
19800033270
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Harms, r. J. (California Univ. La Jolla, CA, United States)
Beaver, E. (California Univ. La Jolla, CA, United States)
Burbidge, E. M. (California, University La Jolla, Calif., United States)
Angel, R. (Arizona, University Tucson, Ariz., United States)
Bartko, F. (California Univ. La Jolla, CA, United States)
Bloomquist, W. (California Univ. La Jolla, CA, United States)
Flemming, J. C. (Martin Marietta Aerospace Denver, Colo., United States)
Bohlin, R. (NASA Goddard Space Flight Center Greenbelt, Md., United States)
Davidsen, A. F. (Johns Hopkins University Baltimore, Md., United States)
Ford, H. (California, University Los Angeles, Calif., United States)