Browsing by Author "Harrison, Fiona A."

Now showing items 1-4 of 4

    • The Nature of Soft Excess in ESO 362-G18 Revealed by XMM-Newton and NuSTAR Spectroscopy 

      Xu, Yerong; García, Javier A.; Walton, Dominic J.; Connors, Riley M. T.; Madsen, Kristin; Harrison, Fiona A. (2021-05-19)
      We present a detailed spectral analysis of the joint XMM-Newton and NuSTAR observations of the active galactic nuclei (AGN) in the Seyfert 1.5 Galaxy ESO 362-G18. The broadband ($0.3\mbox{--}79$ keV) spectrum shows the ...

    • A NuSTAR and Swift View of the Hard State of MAXI J1813-095 

      Jiang, Jiachen; Buisson, Douglas J. K.; Dauser, Thomas; Fabian, Andrew C.; Fürst, Felix; Gallo, Luigi C.; Harrison, Fiona A.; Parker, Michael L.; Steiner, James F.; Tomsick, John A.; Ubach, Santiago; Walton, Dominic J. (2022-08-01)
      We present an analysis of the NuSTAR and Swift spectra of the black hole candidate MAXI J1813−095 in a failed-transition outburst in 2018. The NuSTAR observations show evidence of reflected emission from the inner region ...

    • Orbital Decay in M82 X-2 

      Bachetti, Matteo; Heida, Marianne; Maccarone, Thomas; Huppenkothen, Daniela; Israel, Gian Luca; Barret, Didier; Brightman, Murray; Brumback, McKinley; Earnshaw, Hannah P.; Forster, Karl; Fürst, Felix; Grefenstette, Brian W.; Harrison, Fiona A.; Jaodand, Amruta D.; Madsen, Kristin K.; Middleton, Matthew; Pike, Sean N.; Pilia, Maura; Poutanen, Juri; Stern, Daniel; Tomsick, John A.; Walton, Dominic J.; Webb, Natalie; Wilms, Jörn (2022-10-05)
      M82 X-2 is the first pulsating ultraluminous X-ray source discovered. The luminosity of these extreme pulsars, if isotropic, implies an extreme mass transfer rate. An alternative is to assume a much lower mass transfer ...

    • The Variability Behavior of NGC 925 ULX-3 

      Earnshaw, Hannah P.; Brightman, Murray; Harrison, Fiona A.; Heida, Marianne; Jaodand, Amruta; Middleton, Matthew J.; Roberts, Timothy P.; Walton, Dominic J. (2022-07-25)
      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 behavior of the highly variable ultraluminous ...