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most citedThe role of the reflection fraction in constraining black hole spin

359 citations · 676 across the 9 of their papers we have counts for

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astro-ph.HE2016★ 127 cited

The Soft State of Cygnus X-1 Observed with NuSTAR: A Variable Corona and a Stable Inner Disk

D. J. Walton, J. A. Tomsick, K. K. Madsen +17

We present a multi-epoch hard X-ray analysis of Cygnus X-1 in its soft state based on four observations with NuSTAR. Despite the basic similarity of the observed spectra, there is…