Extended Data Fig. 3: Binned PSDs (n = 6 frequencies per bin, standard error uncertainties) for each of the observations showing evidence for a QPO. | Nature

Extended Data Fig. 3: Binned PSDs (n = 6 frequencies per bin, standard error uncertainties) for each of the observations showing evidence for a QPO.

From: Millihertz oscillations near the innermost orbit of a supermassive black hole

Extended Data Fig. 3

The yellow, orange, and purple data shows the 0.3–2 keV, 1–4 keV, and 2–10 keV PSDs, respectively. Each column corresponds to a single epoch in time. Note that the July-August 2022 (March 2024) data contains 4 (2) observations taken within roughly 1 week of each other. The lower energy PSDs all show a weaker QPO than the higher energy (2–10 keV) PSDs, and thus, we use the 2–10 keV PSDs for analysis of the QPO.

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