Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974aiaa.conf.....p&link_type=abstract
American Institute of Aeronautics and Astronautics and American Geophysical Union, Conference on Scientific Experiments of Skyla
Astronomy and Astrophysics
Astronomy
10
Brightness, Far Ultraviolet Radiation, Imaging Techniques, Kohoutek Comet, Lyman Alpha Radiation, Ultraviolet Photography, Astronomical Photography, Electronography, Galaxies, Hydrogen, Magellanic Clouds, Nebulae, Skylab 4, Spaceborne Astronomy, Stellar Radiation
Scientific paper
The Apollo-16 S201 electronographic camera backup model was modified for use on the Skylab AMS-SAL, which reduced its 20 deg FOV to about 7 deg unvignetted. Over 500 frames were exposed by automatic sequencer through LiF and CaF2. The Lyman-alpha halo of comet Kohoutek has been analyzed for nine occasions, and its long, pointed tail was imaged in 1250-1600 A only near perihelion. Far-UV magnitudes and colors are being derived for about 200 stars, nebulae, and galaxies. Redshifted Lyman-alpha emission from intergalactic atomic hydrogen was not detected in 7 clusters of galaxies. About 25% of the exposed frames were degraded by water damage, electrical discharges, decline in photocathode sensitivity, and loss of AMS mirror reflectance.
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