Now showing items 1-10 of 27

    • Accelerating high-energy pulsar radiation codes 

      Venter, C.; De Jager, O.C. (IOP Publishing, 2010)
      Curvature radiation (CR) is believed to be a dominant mechanism for creating gamma-ray emission from pulsars and is emitted by relativistic particles that are constrained to move along curved magnetic field lines. Additionally, ...
    • Discovery of pulsed γ-rays from PSR J0034-0534 with the Fermi Large Area Telescope: a case for co-located radio and γ-ray emission regions 

      Abdo, A.A.; Venter, C.; Ackermann, M.; Ajello, M.; Allafort, A.; Fermi LAT (IOP Publishing, 2010)
      Millisecond pulsars (MSPs) have been firmly established as a class of γ-ray emitters via the detection of pulsations above 0.1 GeV from eight MSPs by the Fermi Large Area Telescope (LAT). Using 13 months of LAT data, ...
    • Discovery of two millisecond pulsars in Fermi sources with the nançay radio telescope 

      Cognard, I.; Venter, C.; Guillemot, L.; Johnson, T.J.; Smith, D.A.; Fermi LAT (IOP Publishing, 2011)
      We report the discovery of two millisecond pulsars in a search for radio pulsations at the positions of Fermi-Large Area Telescope sources with no previously known counterparts, using the Nan¸cay Radio Telescope. The two ...
    • Fermi Large Area Telescope observations of PSR J1836+5925 

      Abdo, A.A.; Venter, C.; Ackermann, M.; Ajello, M.; Atwood, W.B.; Fermi LAT (IOP Publishing, 2010)
      The discovery of the γ-ray pulsar PSR J1836+5925, powering the formerly unidentified EGRET source 3EG J1835+5918, was one of the early accomplishments of the Fermi Large Area Telescope (LAT). Sitting 25° off the Galactic ...
    • Fermi Large Area Telescope observations of the Vela-X pulsar wind nebula 

      Abdo, A.A.; Venter, C.; Ackermann, M.; Ajello, M.; Allafort, A.; Fermi LAT (IOP Publishing, 2010)
      We report on gamma-ray observations in the off-pulse window of the Vela pulsar PSR B0833–45 using 11 months of survey data from the Fermi Large Area Telescope (LAT). This pulsar is located in the 8° diameter Vela supernova ...
    • Fermi LAT pulsed detection of PSR J0737-3039A in the double pulsar system 

      Guillemot, L.; Venter, C.; Kramer, M.; Johnson, T.J.; Craig, H.A.; Fermi LAT (IOP Publishing, 2013)
      We report the Fermi Large Area Telescope discovery of γ-ray pulsations from the 22.7 ms pulsar A in the double pulsar system J0737−3039A/B. This is the first mildly recycled millisecond pulsar (MSP) detected in the GeV ...
    • Fermi-LAT observations of the Geminga pulsar 

      Abdo, A.A.; Venter, C.; Ackermann, M.; Ajello, M.; Baldini, L.; Fermi LAT (IOP Publishing, 2010)
      We report on the Fermi-LAT observations of the Geminga pulsar, the second brightest non-variable GeV source in the γ-ray sky and the first example of a radio-quiet γ-ray pulsar. The observations cover one year, from the ...
    • The first Fermi Large Area Telescope catalog of gamma-ray pulsars 

      Abdo, A.A.; Venter, C.; Ackermann, M.; Ajello, M.; Atwood, W.B.; Fermi LAT (IOP Publishing, 2010)
      The dramatic increase in the number of known gamma-ray pulsars since the launch of the Fermi Gamma-ray Space Telescope (formerly GLAST) offers the first opportunity to study a sizable population of these high-energy objects. ...
    • Hard spectral tails in magnetars 

      Wadiasingh, Zorawar; Baring, Matthew G.; Gonthier, Peter L.; Harding, Alice K. (Cambridge Univ Press, 2017)
      Pulsed non-thermal quiescent emission between 10 keV and around 150 keV has been observed in ~10 magnetars. For inner magnetospheric models of such hard X-ray signals, resonant Compton upscattering of soft thermal photons ...
    • Identifying the brightest Galactic globular clusters for future observations by H.E.S.S. and CTA 

      Ndiyavala, Hambeleleni; Krüger, Petrus Paulus; Venter, Christo (Oxford Univ Press, 2018)
      We present results from an emission code that assumes millisecond pulsars to be sources of relativistic particles in globular clusters (GCs) and models the resulting spectral energy distribution of Galactic GCs due to ...