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A 78 Day X-ray Period Detected from NGC 5907 ULX1 by Swift
D. J. Walton, F. Fuerst, M. Bachetti +12
We report the detection of a day period in the X-ray lightcurve of the extreme ultraluminous X-ray source NGC 5907 ULX1 ( erg s$^{-1…
An Iron K Component to the Ultrafast Outflow in NGC 1313 X-1
D. J. Walton, M. J. Middleton, C. Pinto +8
We present the detection of an absorpton feature at keV in the combined X-ray spectrum of the ultraluminous X-ray source NGC 1313 X-1 observed with XMM-New…
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…
NuSTAR and Swift observations of the very high state in GX 339-4: Weighing the black hole with X-rays
M. L. Parker, J. A. Tomsick, J. A. Kennea +14
We present results from spectral fitting of the very high state of GX~339-4 with NuSTAR and Swift. We use relativistic reflection modelling to measure the spin of the black hole an…