Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phdt........11h&link_type=abstract
Ph.D. Thesis Indiana Univ., Bloomington.
Astronomy and Astrophysics
Astronomy
Computer Techniques, Image Enhancement, Microcomputers, Telescopes, Television Systems, Computer Programs, Data Acquisition, Image Processing, Image Resolution, Imagery, Numerical Control, Photometry, Spectroscopy
Scientific paper
A slow-scan (8 seconds per frame) television system utilizing a silicon-intensified target (SIT) vidicon has been constructed. Such a TV system, used in a two-dimensional (imaging) mode, permits the accurate measurement of the light intensity from extremely faint astronomical objects. The system consists of a detector head/offset guider assembly that mounts on the telescope; a camera control unit that supplies the analog vidicon voltages and performs video conditioning; and a Z80 microcomputer that controls the data acquisition procedure. The system accommodates several different types of vidicons. Computer software was written to control the data acquisition and to perform image processing. Examples are given of the application of this system to cluster photometry, narrowband photography, and spectroscopy. A detailed study of the nuclear region of the galaxy NGC 2903 is presented.
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