Browsing University of Hertfordshire by Author "Evans, D."

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    • A flare in the jet of Pictor A 

      Marshall, H.L.; Hardcastle, M.J.; Birkinshaw, M.; Croston, J.H.; Evans, D.; Landt, H.; Lenc, E.; Massaro, F.; Perlman, E.; Schwartz, D.A.; Siemiginowska, A.; Stawarz, L.; Urry, C.M.; Worrall, D.M. (2010)
      A Chandra X-ray imaging observation of the jet in Pictor A showed a feature that appears to be a flare that faded between 2000 and 2002. The feature was not detected in a follow-up observation in 2009. The jet itself is ...

    • Modeling x-ray emission of a straight jet : PKS 0920-397 

      Schwartz, D.A.; Massaro, F.; Siemiginowska, A.; Worrall, D.M.; Birkinshaw, M.; Marshall, H.L.; Evans, D.; Perlman, E.; Gelbord, J.M.; Lovell, J.E.J.; Godfrey, L.; Bicknell, G.; Ojha, R.; Hardcastle, M.J.; Jester, S.; Jorstad, S.G.; Stawarz, L. (2010)
      We summarize a study of PKS 0920-397 using our 42 ks Chandra observation in conjunction with our ATCA 20GHz image, and HST/ACS F814W and F475W images. We investigate the hypothesis that the jet X–ray emission is due to ...