What does the 15-year timeline of X-ray flux data allow scientists to move toward studying regarding M31's black hole?

Answer

Periodicity of accretion flares and energetic output

The 15-year timeline of X-ray flux data moves the study from a snapshot view to a time-domain study, allowing scientists to understand the periodicity, if any, of these 'winks' or accretion flares.

What does the 15-year timeline of X-ray flux data allow scientists to move toward studying regarding M31's black hole?
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