Recent topics on magnetic Compton-profile studies are reviewed. A compact introduction describes that the X-ray magnetic Compton-scattering method can be used to measure the momentum density of magnetic electrons, which may be said to be the extreme space-time self correlation of spins. Some examples show that the magnetic Compton profile provides information about the spin component of a magne...

We present an extraordinary variation of the X-ray spectrum of the obscured AGN in NGC 1365, which was observed by Chandra to change from Compton-thin to Compton-thick and back to Compton-thin in four days. This fast variation imply a a size of ∼ 10 14 cm for the emitting region, and an extremely compact size (∼ 10 16 cm) of the clumpy circumnuclear absorber.

We present a full set of model atmosphere equations for the accretion disk around a supermassive black hole irradiated by hard X-ray lamp of power-law spectral distribution. Model equations allow for multiple Compton scattering of radiation on free electrons, and for large relative photon-electron energy exchange at the time of scattering. We present spectra in specific intensities integrated o...