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Proceedings Paper

Large-area CCD mosaic for astronomical imaging
Author(s): J. Anthony Tyson; Gary M. Bernstein; Morley Blouke; Robert W. Lee
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Paper Abstract

Large area charge-coupled devices (CCDs) with unprecedentedly low noise and high quantum efficiency are revolutionizing astronomy probing the universe to record faint levels while imaging relatively large areas of the sky. On-line intelligent pattern recognition software transforms these large images into photometrically accurate catalogs of colors sizes and shapes of thousands of stars and galaxies. The scientific driver for this is starvation: much of modern optical and JR astronomy is " photon starved" . Current research involving faint imaging and spectroscopy often requires total exposure times longer than several nights to obtain good signal-to-noise ratio. One must use the highest quantum efficiency detectors on the largest telescopes and develop image acquisition and reduction techniques which cancel systematic errors to high accuracy. We describe here a CCD mosaic camera and data handling system which will make full use of the light collected by the largest existing telescopes. It uses off-the-shelf CCDs in a mosaic configuration together with automated data acquisition and processing. 2. ULTRA-FAINTCCI) IMAGING IN ASTRONOMY In practice an arbitrary precision in photometry cannot be reached even in an arbitrarily long integration time. Accurate surface photometry to 30-3 1 magnitude arcsecond2 requires the correction of systematic errors to iO-4 of the moonless night sky background. New techniques for ultra-deep imaging made possible by the dimensional and temporal stability of CCDs permit photometry at this level. A series of guided exposures each

Paper Details

Date Published: 12 August 1992
PDF: 9 pages
Proc. SPIE 1656, High-Resolution Sensors and Hybrid Systems, (12 August 1992); doi: 10.1117/12.135921
Show Author Affiliations
J. Anthony Tyson, AT&T Bell Labs. (United States)
Gary M. Bernstein, Steward observatory/Univ. of Arizona (United States)
Morley Blouke, Tektronix, Inc. (United States)
Robert W. Lee, Lassen Research (United States)

Published in SPIE Proceedings Vol. 1656:
High-Resolution Sensors and Hybrid Systems
Morley M. Blouke; Winchyi Chang; Laurence J. Thorpe; Rajinder P. Khosla, Editor(s)

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