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Four years experience in APMS star plate processing - Results and future plansThe present paper describes an automated system for measuring stellar proper motions on the basis of information contained in photographic plates. In this system, the images on a star plate are digitized by a scanning microdensitometer using light from a He-Ne gas laser, and a special-purpose computer arranges the measurements in computer-compatible form on magnetic tape. The scanning and image-reconstruction processes are briefly outlined, and the image-evaluation techniques are discussed. It is shown that the present system has been especially successful in measuring the proper motions of low-luminosity stars, including 119 stars with less than 1/10,000 of the solar bolometric luminosity. Plans for measurements of high-density Milky Way star plates are noted.
Document ID
19760039412
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Newcomb, J. S.
(Control Data Corp. Minneapolis, Minn., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Image processing techniques in astronomy
Location: Utrecht
Country: Netherlands
Start Date: March 25, 1975
Accession Number
76A22378
Funding Number(s)
CONTRACT_GRANT: NSR-24-005-062
Distribution Limits
Public
Copyright
Other

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