Observations of the cosmic background radiation at 1440 angstroms

Details Observations of the cosmic background radiation at 1440 angstroms Observations of the cosmic background radiation at 1440 angstroms

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...230..304p&link_type=abstract

Astrophysical Journal, Part 1, vol. 230, June 1, 1979, p. 304-310. Research supported by the University of California;

Astronomy and Astrophysics

Astronomy

43

Background Radiation, Extraterrestrial Radiation, Far Ultraviolet Radiation, Interstellar Matter, Ultraviolet Astronomy, Apollo Soyuz Test Project, Cosmic Dust, Galactic Radiation, Intergalactic Media

Scientific paper

A survey of the summer night sky in the 1350-1550-A band at 2.5-deg angular resolution was carried out with a far-ultraviolet channel of the Berkeley Extreme Ultraviolet (EUV) telescope on the Apollo-Soyuz mission. The large collecting area and small field of view of this telescope permitted the identification and removal from the data of individual stars of spectral type A2 or earlier with visual magnitude brighter than about 6.5. A residual signal significantly above background remains which is not of terrestrial or interplanetary origin and varies with view direction between approximately 30 and 2000 counts/s. The source of the emission is observed to be highly concentrated to the galactic plane with a distribution of half-width about 10 deg centered on the plane and a roughly constant-intensity tail extending out to both galactic poles. The minimum signal detected at high and moderate latitudes corresponds to 300 + or - 60 photons/sq cm-s-sr-A. This minimum flux may be due to scattering from interstellar dust, or it may be extragalactic in origin.

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