Browsing by Author "Landt, H."

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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 ...

    • Transient obscuration event captured in NGC 3227 III. Photoionization modeling of the X-ray obscuration event in 2019 

      Mao, Junjie; Kaastra, J. S.; Mehdipour, M.; Kriss, G. A.; Wang, Yijun; Grafton-Waters, S.; Branduardi-Raymont, G.; Pinto, C.; Landt, H.; Walton, D. J.; Costantini, E.; Gesu, L. Di; Bianchi, S.; Petrucci, P. -O.; Marco, B. De; Ponti, G.; Fukazawa, Yasushi; Ebrero, J.; Behar, E. (2022-09-12)
      Context. A growing number of transient X-ray obscuration events in type I active galactic nuclei suggest that our line of sight to the central engine is not always free. Multiple X-ray obscuration events were reported in ...