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Browsing by Author "Burke, Mark J."

Browsing by Author "Burke, Mark J."

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  • The Fading of Two Transient Ultraluminous X-Ray Sources to below the Stellar Mass Eddington Limit 
    Burke, Mark J.; Kraft, Ralph P.; Soria, Roberto; Maccarone, Thomas J.; Raychaudhury, Somak; Sivakoff, Gregory R.; Birkinshaw, Mark; Brassington, Nicola J.; Forman, William R.; Hardcastle, Martin J.; Jones, Christine; Murray, Stephen S.; Worrall, Diana M. (2013)
    We report new detections of the two transient ultraluminous X-ray sources (ULXs) in NGC 5128 from an ongoing series of Chandra observations. Both sources have previously been observed L<SUB>x</SUB> (2-3) × ~10<SUP>39</SUP> ...
  • The Hard X-Ray Continuum of Cen A Observed With INTEGRAL SPI 
    Burke, Mark J.; Jourdain, Elisabeth; Roques, Jean-Pierre; Evans, Daniel A. (2014)
    We revisit the average hard X-ray spectrum from the active galactic nucleus (AGN) of Centaurus A (Cen A) using 10 yr worth of observations with INTEGRAL SPI. This source has the highest flux observed from any AGNs in the ...
  • Spectral Properties of X-Ray Binaries in Centaurus A 
    Burke, Mark J.; Raychaudhury, Somak; Kraft, Ralph P.; Maccarone, Thomas J.; Brassington, Nicola J.; Hardcastle, Martin J.; Kainulainen, Jouni; Woodley, Kristin A.; Goodger, Joanna L.; Sivakoff, Gregory R.; Forman, William R.; Jones, Christine; Murray, Stephen S.; Birkinshaw, Mark; Croston, Judith H.; Evans, Daniel A.; Gilfanov, Marat; Jordán, Andrés; Sarazin, Craig L.; Voss, Rasmus; Worrall, Diana M.; Zhang, Zhongli (2013)
    We present a spectral investigation of X-ray binaries (XBs) in NGC 5128 (Cen A), using six 100 ks Chandra observations taken over two months in 2007. We divide our sample into thermally and non-thermally dominated states ...
  • A Transient Sub-Eddington Black Hole X-Ray Binary Candidate in the Dust Lanes of Centaurus A 
    Burke, Mark J.; Raychaudhury, Somak; Kraft, Ralph P.; Brassington, Nicola J.; Hardcastle, Martin J.; Goodger, Joanna L.; Sivakoff, Gregory R.; Forman, William R.; Jones, Christine; Woodley, Kristin A.; Murray, Stephen S.; Kainulainen, Jouni; Birkinshaw, Mark; Croston, Judith H.; Evans, Daniel A.; Gilfanov, Marat; Jordán, Andrés; Sarazin, Craig L.; Voss, Rasmus; Worrall, Diana M.; Zhang, Zhongli (2012)
    We report the discovery of a bright X-ray transient CXOU J132527.6-430023 in the nearby early-type galaxy NGC 5128. The source was first detected over the course of five Chandra observations

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