Astronomy and Astrophysics – Astronomy
Scientific paper
May 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978esabu..13....9m&link_type=abstract
ESA Bulletin, no. 13, May 1978, p. 9-14.
Astronomy and Astrophysics
Astronomy
1
Iue, Spaceborne Astronomy, Stellar Spectrophotometry, Ultraviolet Astronomy, Echelette Gratings, European Space Agency, Satellite Control, Solar Arrays, Spaceborne Telescopes, Synchronous Satellites, Ultraviolet Spectrometers
Scientific paper
The scientific goals, instrumentation, and observational routine of the International Ultraviolet Explorer are described. The IUE, launched January 26, 1978, is in geosynchronous orbit, and there is continuous communication with ESA's ground station at Villafranca near Madrid and NASA's ground station at Goddard Space Flight Center during the observing shifts. Since the satellite can be commanded and data can be received in real time, the ground-based observer can make step-by-step decisions about his observing program in the same way as he would at a ground-based observatory. Among other goals, the project seeks to obtain high-resolution spectra of stars of all spectral types and to study gas streams in and around some binary systems. The format of the spectrum, which consists of a series of adjacent spectral orders displayed one above another in a rasterlike pattern, makes efficient use of the sensitive area of the SEC Vidicon television tubes used to integrate and record the spectrum. Preliminary studies are surveyed.
Macchetto Ferdinando
Penston Michael V.
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