For 10 points, name this type of electromagnetic radiation discovered by Wilhelm Rontgen and commonly used in medical imaging.
The observance of a 3.5 keV peak in the spectrum of this kind of radiation from multiple galaxies may be due to the decay or annihilation of dark matter. About every 45 minutes, a pulse of this type of radiation originates from Jupiter's north pole. Accretion disks primarily emit this form of radiation. A satellite named after (*) Chandrashekar observes this type of radiation. For 10 points, name this type of electromagnetic radiation discovered by Wilhelm Rontgen and commonly used in medical imaging.
The observance of a 3.5 keV peak in the spectrum of this kind of radiation from multiple galaxies may be due to the decay or annihilation of dark matter.
x-rays