Browsing by Author "Earnshaw, Hannah"

Now showing items 1-4 of 4

    • An 8.56 keV absorption line in the hyperluminous X-ray source in NGC 4045: Ultra-fast outflow or cyclotron line? 

      Brightman, Murray; Kosec, Peter; Fürst, Felix; Earnshaw, Hannah; Heida, Marianne; Middleton, Matthew J; Stern, Daniel; Walton, Dominic J (2022-04-21)
      We report on the discovery of an absorption line at $E=8.56^{+0.05}_{-0.11}$ keV detected with a significance of $>3.3\sigma$ in the NuSTAR and XMM-Newton spectra of a newly discovered hyperluminous X-ray source (HLX, ...

    • An 8.56 keV Absorption Line in the Hyperluminous X-Ray Source in NGC 4045: Ultrafast Outflow or Cyclotron Line? 

      Brightman, Murray; Kosec, Peter; Fürst, Felix; Earnshaw, Hannah; Heida, Marianne; Middleton, Matthew J; Stern, Daniel; Walton, Dominic J (2022-04-21)
      We report on the discovery of an absorption line at E=8.56−0.11+0.05 keV detected with a significance of >3.3σ in the NuSTAR and XMM-Newton spectra of a newly discovered hyperluminous X-ray source (L X > 1041 erg s−1) in ...

    • Evolution of the spin, spectrum and super-orbital period of the ultraluminous X-ray pulsar M51 ULX7 

      Brightman, Murray; Bachetti, Matteo; Earnshaw, Hannah; Fürst, Felix; Heida, Marianne; Israel, Gian Luca; Pike, Sean; Stern, Daniel; Walton, Dominic J (2022-01-21)
      M51 ULX7 is among a small group of known ultra luminous X-ray pulsars (ULXPs). The neutron star powering the source has a spin period of 2.8 s, orbits its companion star with a period of 2 days, and a super orbital period ...

    • A New Sample of Transient Ultraluminous X-Ray Sources Serendipitously Discovered by Swift/XRT 

      Brightman, Murray; Hameury, Jean-Marie; Lasota, Jean-Pierre; Baldi, Ranieri D.; Bruni, Gabriele; Cann, Jenna M.; Earnshaw, Hannah; Fürst, Felix; Heida, Marianne; Jaodand, Amruta; Lazzarini, Margaret; Middleton, Matthew J.; Walton, Dominic J.; Weaver, Kimberly A. (2023-07-03)
      Ultraluminous X-ray sources (ULXs) are our best laboratories for studying extreme super-Eddington accretion. Most studies of these objects are of relatively persistent sources; however, there is growing evidence to suggest ...