Apollo-Soyuz survey of the extreme ultraviolet/soft X-ray background.
Abstract
The paper reports results of the most extensive survey to date of the EUV/soft X-ray background, obtained with an EUV telescope on the Apollo-Soyuz mission. The principal results may be summarized as follows: (1) an intense background flux exists down to energies of 100 eV (4.0 plus or minus 1.3 photons/sq cm/sec/sr/eV average diffuse flux); (2) the Apollo-Soyuz data alone places lower and upper limits on single-temperature models for EUV-emitting interstellar gas for the log T range of 5.1-6.0; and (3) the allowed range would have to be restricted to log T of 5.1-5.6 for the Cash, Malina, and Stern (1976), Burstein et al. (1977), and Apollo-Soyuz data sets to satisfy a single-temperature model for the background at not greater than 280 eV.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1979
- DOI:
- 10.1086/157134
- Bibcode:
- 1979ApJ...230..755S
- Keywords:
-
- Apollo Soyuz Test Project;
- Background Radiation;
- Far Ultraviolet Radiation;
- X Rays;
- Astronomical Models;
- Diffuse Radiation;
- Interstellar Gas;
- X Ray Sources;
- Space Radiation;
- Extreme UV:Interstellar Matter;
- X-Ray Background;
- X-Ray Background:Soft X Rays