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  • Other Sources  (3)
  • 1985-1989
  • 1975-1979  (3)
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  • 1
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    High-precision infrared sky survey at wavelength 2.7 microns (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Preliminary results of an infrared survey of the equatorial sky zone (declinations 10 S to 10 N) with U.S. Air Force satellite sensors show that positions of previously unknown infrared sources are measured with an rms accuracy of 4 arc seconds, which is six times better than the best previous infrared survey. The search area per source for further study is thus 36 times smaller, so that identification of the infrared sources with optical objects in catalogs and sky photographs is facilitated, as is reacquisition of the sources with ground-based infrared telescopes. The survey extends the content of near-infrared source catalogs to lower flux densities and adds information at a wavelength not observable from the ground. Objects found in the survey include cool giants and supergiants, long-period and semi-regular variable stars, and sources identified with faint red stars visible on the Palomar Observatory Sky Survey.
    Keywords: SOLAR PHYSICS
    Type: Modern utilization of infrared technology III: Civilian and military; Third Seminar; Aug 25, 1977 - Aug 26, 1977; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Distribution of astronomical sources in the second Equatorial Infrared Catalogue (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: Measurements of infrared (2.7-micron) source positions and flux densities have been derived based on an additional 60.6 hours of satellite observations beyond those considered in the preparation of the Equatorial Infrared Catalogue No. 1 (EIC-1). These data have been processed together with the EIC-1 data to produce EIC-2. The new catalog differs from EIC-1 as follows: there are 1278 sources; there is a larger percentage of unidentified sources; there are increased numbers of sources identified with Two-Micron Sky Survey sources, AFGL sources, AGK3 stars and SAO stars.
    Keywords: ASTRONOMY
    Type: Modern utilization of infrared technology V; August 29, 30, 1979; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Development of the Equatorial Infrared Catalogue from satellite data (1978)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: More than 40,000 infrared measurements of stellar sources have been obtained since November, 1976 during the ongoing process of compiling an Equatorial Infrared Catalogue. Because of the problem of eliminating spurious sources, which has affected earlier space surveys, an extensive effort is being made to verify the sources by means of (1) repetitive observations by satellite sensors, (2) cross correlation with a large data base developed from ground-based and space surveys at other wavelengths, and (3) investigation of a significant subset of the sources with a ground-based infrared telescope. As sources are verified, they are transferred from a working list to a screened preliminary version of the catalogue. The catalogue comprises the only survey of a significant area of the sky that has been accomplished (or is presently planned) with positional accuracies of a few arc seconds at a wavelength of not less than 2 microns.
    Keywords: GEOPHYSICS
    Type: Modern utilization of infrared technology IV; Seminar; Aug 30, 1978 - Aug 31, 1978; San Diego, CA
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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