Now showing items 1-4 of 4

    • Characterising the long-term variability of blazars in leptonic models 

      Thiersen, Hannes; Zacharias, Michael; Böttcher, Markus (MDPI, 2019)
      Most research on blazar variability focuses on individual flares to explain acceleration and radiation mechanisms and improve on current models. These short-time events (being minutes, hours, or days) might not be ...
    • H.E.S.S. monitoring of PKS 2155-304 in 2015 and 2016 

      Wierzcholska, Alicja; Zacharias, Michael; Jankowsky, Felix; Wagner, Stefan (MDPI, 2019)
      PKS 2155-304 is one of the brightest blazar located in Southern Hemisphere, monitored with H.E.S.S. since the first light of the experiment. Here we report multiwavelength monitoring observations collected during the ...
    • The long-lasting activity in the flat spectrum radio quasar (FSRQ) CTA 102 

      Zacharias, Michael; Böttcher, Markus; Jankowsky, Felix; Lenain, Jean-Philippe; Wagner, Stefan J. (MDPI, 2019)
      The flat spectrum radio quasar CTA 102 ( z=1.032 ) went through a tremendous phase of variability. Since early 2016 the gamma-ray flux level has been significantly higher than in previous years. It was topped by a four ...
    • The VHE γ-ray view of the FSRQ PKS 1510-089 

      Zacharias, Michael; Prester, Dijana Dominis; Jankowsky, Felix; Lindfors, Elina; Meyer, Manuel; H.E.S.S. Collaboration; MAGIC Collaboration (MDPI, 2019)
      The flat spectrum radio quasar PKS 1510-089 is a monitored target in many wavelength bands due to its high variability. It was detected as a very-high-energy (VHE) γ-ray emitter with H.E.S.S. in 2009, and has since been a ...