X-ray power density spectra (PDS) corresponding to the six RXTE observations of GRS 1915+105. The PDS were fitted using a superposition of Lorentzian functions comprising two broad continuum components (blue dot-dashed and green dotted curves) and several narrow QPO peaks (remaining curves). For all six observations, the derived properties of higher frequency continuum component are consistent with the radio-loud χ state.
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