PROFESSOR ANDREW C. FABIAN

X-ray irradiation of the accretion disk by the power-law emitting corona leads to the disk showing backscattered and fluorescent emission, known as reflection, and a time delay between the direct emission and reflection, known as reverberation. Both phenomena are now routinely observed from X-ray bright Seyfert galaxies and X-ray reflection is well-studied from accreting stellar mass black hole and neutron star systems. They provide a means to study and map the innermost accretion flow immediately around the central black hole and to determine the spin of the black hole. Recent observational and theoretical advances will be shown and discussed.