Browsing Faculty of Natural and Agricultural Sciences by Subject "Gamma-rays: general"

Now showing items 1-5 of 5

    • Discovery of very high energy gamma rays from 1ES 1440 + 122 

      Archambault, S.; Böttcher, M.; Archer, A.; Barnacka, A.; Behera, B. (Oxford Univ Press, 2016)
      The BL Lacertae object 1ES 1440+122 was observed in the energy range from 85 GeV to 30 TeV by the VERITAS array of imaging atmospheric Cherenkov telescopes. The observations, taken between 2008 May and 2010 June and totalling ...

    • Exploiting morphological data from Pulsar Wind Nebulae via a spatiotemporal leptonic transport code 

      Van Rensburg, C.; Venter, C.; Seyffert, A.S.; Harding, Alice K. (Oxford Univ Press, 2020)
      The next era of ground-based Cherenkov telescope development will see a great increase in both quantity and quality of γ-ray morphological data. This initiated the development of a spatiotemporal leptonic transport code ...

    • Multiwavelength study of quiescent states of Mrk 421 with unprecedented hard x-ray coverage provided by NuSTAR in 2013 

      Balokovic, M.; Böttcher, M.; Paneque, D.; Madejski, G.; Furniss, A. (IOP Publishing, 2016)
      We present coordinated multiwavelength observations of the bright, nearby BL Lacertae object Mrk 421 taken in 2013 January–March, involving GASP-WEBT, Swift, NuSTAR, Fermi-LAT, MAGIC, VERITAS, and other collaborations and ...

    • Spatially dependent modelling of pulsar wind nebula G0.9+0.1 

      Van Rensburg, C.; Krüger, P.P.; Venter, C. (Oxford Univ Press, 2018)
      We present results from a leptonic emission code that models the spectral energy distribution of a pulsar wind nebula by solving a Fokker–Planck-type transport equation and calculating inverse Compton and synchrotron ...

    • Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance 

      Abdalla, H.; Arcaro, C.; Backes, M.; Barnard, M.; Böttcher, M.; Chand, T.; Chandra, S.; Kreter, M.; Ndiyavala, H.; Schutte, H.M.; Seyffert, A.S.; Van der Walt, D.J.; Van Rensburg, C.; Venter, C.; Wadiasingh, Z.; Zacharias, M.; Żywucka, N.; H.E.S.S. Collaboration (Oxford Univ Press, 2020)
      We report on the detection of very high energy (VHE; E > 100 GeV) γ-ray emission from the BL Lac objects KUV 00311−1938 and PKS 1440−389 with the High Energy Stereoscopic System (H.E.S.S.). H.E.S.S. observations were ...