Spatial Power Spectral Analysis of the Suzaku X-Ray Background

Power spectra of spatial fluctuations X-ray emission may impose constraints on the origins independent that from energy spectra. We generated power spectrum densities (PSD) blank skies observed with Suzaku observatory utilizing modified $\Delta$-variance method. Using total measured count rate as diagnostic tool, we found a model consisting sum two components, one for unresolved faint point sources and uniform flat-field emission, can well represent PSD in three different bands (0.2-0.5 keV, 0.5-2 2-10 keV); only an upper limit is obtained latter component keV. counting rates corresponding to best-fit functions diffuse fractions were estimated, confirmed components consistent those actually detector all bands. The ratio however, significantly larger than fraction estimated fits discussed this discrepancy be reconciled by systematic effects analyses. present study demonstrates powerful constraining emission.