Conclusions

• There is no long-term stable periodicity in flux variations of LMC X-3,

• Times between minima are related by rational fractions,

• Phase space orbits trace out a structure reminiscent of a nonlinear oscillator of low dimension.

• ASM data well suited to non-linear data analysis techniques

ASM Analysis

PCA Analysis

• Intensity varies by a factor of nearly 200 from bright to faint,

• PCA data at different source intensities and epochs sometimes show orbital phase modulation,

• Orbit-to-orbit intensity variations appear to repeat at multiples of the orbital period,

• Excited disk mode with suborbital rotation can explain this, as can beats between orbit and disk resonances.