Cataclysmic variables 1 Electromagnetic wave emission 1 Electron sources 1 Galactic bulge 1 Galaxies 1 Galaxy: stellar content 1 Galaxy:stellar content 1 Infrared devices 1 Iron 1 Magnetism 1 Near-infrared imaging 1 Novae cataclysmic variables 1 Spectroscopic analysis 1 Stars:late type 1 Thermography (imaging) 1 White dwarfs 1 X ray apparatus X ray scattering 1 X-ray emission 1 X-ray sources 1 X-ray:stars 1 X-rays: diffuse background 1 X-rays: stars 1 novae, cataclysmic variables 1 stars: late-type 1