Browsing University of Hertfordshire by Author "Strong, A.~W."

Now showing items 1-3 of 3

    • Gamma-ray spectroscopy of positron annihilation in the Milky Way 

      Siegert, T.; Diehl, R.; Khachatryan, G.; Krause, M.~G.~H.; Guglielmetti, F.; Greiner, J.; Strong, A.~W.; Zhang, X. (2016-02-01)
      Context. The annihilation of positrons in the Galaxy's interstellar medium produces characteristic gamma-rays with a line at 511 keV. This gamma-ray emission has been observed with the spectrometer SPI on ESA's INTEGRAL ...

    • INTEGRAL/SPI γ -ray line spectroscopy : Response and background characteristics 

      Diehl, R.; Siegert, T.; Greiner, J.; Krause, M.; Kretschmer, K.; Lang, M.; Pleintinger, M.; Strong, A.~W.; Weinberger, C.; Zhang, X. (2018-03-20)
      Context. The space based γ-ray observatory INTEGRAL of the European Space Agency (ESA) includes the spectrometer instrument "SPI". This is a coded mask telescope featuring a 19-element Germanium detector array for ...

    • Positron annihilation signatures associated with the outburst of the microquasar V404 Cygni 

      Siegert, T.; Diehl, R.; Greiner, J.; Krause, M.~G.~H.; Beloborodov, A.~M.; Bel, M.~C.; Guglielmetti, F.; Rodriguez, J.; Strong, A.~W.; Zhang, X. (2016-03-17)
      Microquasars1, 2, 3, 4 are stellar-mass black holes accreting matter from a companion star5 and ejecting plasma jets at almost the speed of light. They are analogues of quasars that contain supermassive black holes of 106 ...