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<i>XMM‐Newton</i>Spectroscopy of the Galactic Microquasar GRS 1758−258 in the Peculiar Off/Soft State
We report on an XMM-Newton Reflection Grating Spectrometer observation of the black hole candidate and Galactic microquasar GRS 1758-258. The source entered a peculiar "off/soft" state in 2001 late February in which the spectrum softened while the X-ray flux—and the inferred mass accretion rate—steadily decreased. We find no clear evidence …