Extreme ultraviolet survey experiment MA-083

Details Extreme ultraviolet survey experiment MA-083 Extreme ultraviolet survey experiment MA-083

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apso.nasaq....b&link_type=abstract

In NASA. Lyndon B. Johnson Space Center Apollo-Soyuz Test Project 16 p (SEE N76-23074 13-88)

Other

Apollo Soyuz Test Project, Far Ultraviolet Radiation, Stellar Spectra, Apollo Spacecraft, Grazing Incidence Telescopes, Spaceborne Telescopes, Stellar Spectrophotometry, White Dwarf Stars

Scientific paper

A grazing incidence telescope sensitive to radiation in the 5- to 100-nanometer band was flown in the Apollo service module. On 10 nighttime revolutions, the command and service module was maneuvered to point the instrument at 30 different stellar targets for periods of 1 to 20 minutes, thus constituting the first sensitive search for extreme ultraviolet radiation from nonsolar sources. Several hours of supplementary data were also obtained during nighttime orbits when other experiments in the scientific instrument module bay were operating. Preliminary analysis of a small fraction of the total data indicates the definite detection of a strong source of extreme ultraviolet radiation during observations made during revolution 109. The source is located in Coma Berencies. The suggested optical identification is the white dwarf HZ 43. If this association is correct, the star has the highest temperature of any known white dwarf. Regardless of the optical identification, however, this object is the first nonsolar source to be detected in the extreme ultraviolet band.

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