Concepedia
The Astrophysical Journal · 1970 · 33 citations · 0 references
Natural SciencesAstronomyX-ray AstronomyExtragalactic X-ray SourcesX-ray OpticsX-ray Source CatalogsX-ray SpectroscopySoft X-ray AstronomySoft X-ray BackgroundSoft X-ray OpticsSoft X-ray SpectroscopyX-ray Irradiation