Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975s%26t....49...82w&link_type=abstract
Sky and Telescope, vol. 49, Feb. 1975, p. 82-86.
Astronomy and Astrophysics
Astronomy
Education, Solar Observatories, Spectroheliographs, Telescopes, Image Intensifiers, Infrared Astronomy, Solar Granulation, Television Cameras
Scientific paper
Lay-out and instrumentation are described for a small observatory for studying solar system objects. The telescope is a 6-inch f/15 refractor equipped with an optically flat heliostat mirror, and it operates mostly in the southern sky. A TV camera can transfer the image to remote locations, and a 45-deg flippable mirror can send light to either of two workbenches so that a solar image can be directed into a spectrograph or spectroheliograph or projected on a wall target three ft in diameter. White light phenomena show up well: surface granulation, faculae, limb darkening, and detail in sunspots. The building consists of self-supporting panels of concrete reinforced by exterior abutments to carry the weight of the roof. Success has been achieved in recording, with the aid of a two-state image intensifier, mutual occultations of Jupiter's four bright satellites. The solar spectrum is projected onto a 7-by-18-inch target, and when the low-level TV camera is turned on this target, lines show well beyond the visible red into IR and reproduce nicely on remote monitor screens.
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