XMM-Newton Proposal 03032101

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, 1E1740.7-2942, Xmm-Newton Proposal 03032101

Scientific paper

It has been known that sources that have high absorption column density (NH) also have high dust column density along the line of sight. The differential delays caused by small angle scattering from dust may have important effects on the power spectra of Galactic black holes (GBHs) at low energies, and impact studies that use the relation between the rms amplitude of variability and energy to determine the origin of QPOs from these sources. We propose to observe high NH (1E23 cm-2) GBH 1E1740.7-2942 for 20 ks simultaneously with XMM-Newton and RXTE. By comparing the power spectra from the PSF in XMM-Newton (using imaging and excluding the scattering halo) and the RXTE data, we will investigate the effects of small angle scattering on the timing properties of GBHs.

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