Abstract:
Orbiting features near a black hole can cause variability in
optical/UV and X-ray bands with quasi-periodic signatures. The variable
flux is derived in Kerr geometry including the following relativistic effects:
light bending, time delay, Doppler and gravitational shifts and aberration.
The model can be used as a distinguishing timing signature to identify types
of accretion disks in active galactic nuclei and X-ray binaries and to constrain the black hole mass and spin.
