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  • INSTRUMENTATION AND PHOTOGRAPHY  (4)
  • 1
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    Explosive Transient Camera (ETC) Program (1991)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Since the inception of the ETC program, a wide range of new technologies was developed to support this astronomical instrument. The prototype unit was installed at ETC Site 1. The first partially automated observations were made and some major renovations were later added to the ETC hardware. The ETC was outfitted with new thermoelectrically-cooled CCD cameras and a sophisticated vacuum manifold, which, together, made the ETC a much more reliable unit than the prototype. The ETC instrumentation and building were placed under full computer control, allowing the ETC to operate as an automated, autonomous instrument with virtually no human intervention necessary. The first fully-automated operation of the ETC was performed, during which the ETC monitored the error region of the repeating soft gamma-ray burster SGR 1806-21.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: AD-B183806L , NASA-CR-188957 , NAS 1.26:188957 , MIT-85469
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    NASA TECHNICAL REPORTS
  • 2
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    The explosive transient camera - An automatic, wide-field sky monitor for short-timescale optical transients (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The Explosive Transient Camera (ETC) is a widefield sky monitor designed to detect short-timescale (1-l0 s) celestial optical flashes. It consists of two arrays of wide-field CCD cameras monitoring about 0.4 steradian of the night sky for optical transients with risetimes of about 1-10 s and peak magnitudes m(V) of less than about 10. The ETC was designed to be completely automated in order to make year-round observations with minimal human intervention. A small, powerful 68,000-based computer controls all aspects of observations, including roof motion, CCD readouts, and weather sensing: under software control, the ETC is able to perform all the functions of a human observer automatically.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: In: Robotic telescopes in the 1990s; Proceedings of the Symposium, 103rd Annual Meeting of the Astronomical Society of the Pacific, Univ. of Wyoming, Laramie, June 22-24, 1991, 1991 (A93-36457 14-89); p. 123-136.
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    NASA TECHNICAL REPORTS
  • 3
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    Design of low noise, high performance X-ray charge-coupled-device cameras (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: This paper describes some of the critical details of the MIT X-ray CCD camera design. Special attention is given to those portions of the system that deviate from conventional practice in the design of CCD cameras. Furthermore, an attempt has been made to generalize the design so that both optical and X-ray requirements can be satisfied whenever possible. Currently, noise levels of less than 8 electrons rms are routinely achieved with this design, and even lower levels (less than 5 electrons) should be realizable.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Optical Engineering (ISSN 0091-3286); 26; 1055-106
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  • 4
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    Imaging and nondispersive spectroscopy of soft X rays using a laboratory X-ray charge-coupled-device system (1987)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: This paper describes the design and performance of a laboratory instrument for imaging and nondispersive spectroscopy of soft X-rays (300 eV to 10 keV) utilizing a virtual-phase CCD. This instrument has achieved a spatial resolution of 22 microns (limited by pixel size) with an overall array area of 584 x 390 pixels. It has achieved an energy resolution of about 140 eV FWHM for single-pixel Fe-55 X-ray events (5.9 keV) with the CCD operated at -30 C. The CCD has been operated in photon-counting mode at room temperature, and X-ray spectra with an energy resolution of about 450 eV at 5.9 keV have been obtained. The low energy X-ray sensitivity of the CCD also has been demonstrated by detecting carbon K-alpha X-rays (277eV).
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Optical Engineering (ISSN 0091-3286); 26; 1048-105
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