Image Details
Caption: Figure 3.
Power spectra obtained from XMM-Newton PN using the Lomb–Scargle algorithm (top figure) and CLEAN algorithm (bottom figure). The Ω peak is identified, along with the expected (from FPMA power spectra) position of ω. Few sideband frequencies and harmonics are labeled.
© 2022. The Author(s). Published by the American Astronomical Society.