Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1236...13c&link_type=abstract
IN: Advanced technology optical telescopes IV; Proceedings of the Meeting, Tucson, AZ, Feb. 12-16, 1990. Part 1 (A91-23201 08-89
Astronomy and Astrophysics
Astronomy
5
Astronomical Observatories, Charge Coupled Devices, Image Analysis, Mirrors, Telescopes, Optical Equipment, Pixels, Seeing (Astronomy)
Scientific paper
Image-quality data are presented which were gathered at the University of Arizona's Multiple Mirror Telescope (MMT) using a very high quality 1.8-m mirror, for median image sizes of 0.72 arcsec in 8-sec integrations. The measured image is judged to have been degraded by 0.48 arcsec from that allowed by the free atmosphere by such factors as errors in telescope focus, collimation, mirror support, mirror seeing, and the combined optical figure of the five mirror surfaces required to bring the light to the image-analysis CCD. These data imply the appropriateness of a total optical error budget of 0.2 arcsec for 8-m diameter telescopes currently being designed.
Chaffee Frederic H.
Cromwell Richard H.
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