ACCRETION DISK SELF-ECLIPSE - X-RAY LIGHT-CURVE AND EMISSION-LINE

We develop a method of calculating the X-ray signal from a " spot " corotating with an accretion disk around a black hole and the emission line from the X-ray-illuminated disk. The disk self-eclipse is considered, and all effects of general relativity on the motion of photons are included with no approximation. The eclipse strongly affects the shape of the X-ray light curve of the spot and the K fluorescent line irradiated by the disk. The FWHM and strength of the line profile are reduced significantly if the eclipsed region of the orbit is very deep. For a given radius of a ring in the disk, this occurs when the eclipsed region of the orbit is deeper than pi/2. The centroid of a line profile is also subject to the eclipse effect.