Left: total flux F( t) observed at = 5° for (solid black curve) compared to the accretion rate (dotted blue curve) at r = 3.5 M and emissivity at r = 3.5 M (dashed red curve). All rates are normalized to their time averages. Right: power spectra of these rates and their best-fit power laws. The values of the best-fit power-law exponents are , , and α _F = −2.1.