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  • 1990-1994  (2)
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  • 1
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    Performance of the FOS Detectors in a Variable External Magnetic Field (1993)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: We present the results of an investigation of the in-orbit performance of the Digicon detectors in the Faint Object Spectrograph (FOS), conducted as part of the commissioning phase of the Hubble Space Telescope. This paper includes orbital results on detector background noise, sensor image stability, and photometric stability along with several typical FOS observations. New techniques for suppressing cosmic ray induced background and geomagnetic induced image motion in electron tube detectors are also discussed.
    Keywords: Astronomy
    Type: NASA-CR-204023 , NAS 1.26:204023 , SPIE Proceedings Series; 1945; 287-300|Space Astronomical Telescopes and Instruments 2; Apr 13, 1993 - Apr 14, 1993; Orlando, FL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    On-Orbit Sky Background Measurements with the FOS (1993)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Observations of the sky background obtained with the Faint Object Spectrograph during 1991-1992 are discussed. Sky light can be an important contributor to the observed count rate in several of the instrument configurations especially when large apertures are used. In general, the sky background is consistent with the pre-launch expectations and showed the expected effects of zodiacal light and diffuse galactic light. In addition to these sources, there is, particularly during the daytime, a highly variable airglow component which includes a number of emission lines. The sky background will have an impact on the reduction and possibly the interpretation of some spectra.
    Keywords: Astronomy
    Type: NASA-CR-204004 , NAS 1.26:204004 , SPIE Proceedings Series; 1945; 232-243|Space Astronomical Telescopes and Instruments 2; Apr 13, 1993 - Apr 14, 1993; Orlando, FL; United States
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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