164 citations · 1.4k across the 49 of their papers we have counts for
5 papers · 1 filter
Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-1
F. Barra, C. Pinto, D. J. Walton +11
Despite two decades of studies, it is still not clear whether ULX spectral transitions are due to stochastic variability in the wind or variations in the accretion rate or in the s…
The variability behavior of NGC 925 ULX-3
Hannah P. Earnshaw, Murray Brightman, Fiona A. Harrison +5
We report the results of a 2019-2021 monitoring campaign with Swift and associated target-of-opportunity observations with XMM-Newton and NuSTAR, examining the spectral and timing…
Measuring the Evolution of the NuSTAR Detector Gains
Brian Grefenstette, Murray Brightman, Hannah P. Earnshaw +3
The memo describes the methods used to track the long-term gain variations in the NuSTAR detectors. It builds on the analysis presented in Madsen et al. (2015) using the deployable…
An 8.56 keV absorption line in the hyperluminous X-ray source in NGC 4045: ultra-fast outflow or cyclotron line?
Murray Brightman, Peter Kosec, Felix Fürst +5
We report on the discovery of an absorption line at keV detected with a significance of in the NuSTAR and XMM-Newton spectra of a newly discovered…
Reconstruction of the NuSTAR point spread function using single-laser metrology
Hannah P. Earnshaw, Kristin K. Madsen, Karl Forster +4
This paper describes a method by which the metrology system of the Nuclear Spectroscopic Telescope Array (NuSTAR) X-ray space observatory, which uses two lasers to characterize the…