Browsing Conference Papers - Potchefstroom Campus by Author "896e01e1-1834-4057-9f6f-42f9665d7ef1"
Now showing items 1-12 of 12
-
Calibration of statistical methods used to constrain pulsar geometries via multiband light curve modelling
Bezuidenhout, M.C.; Venter, C.; Seyffert, A.S.; Harding, A.K. (SAIP, 2016)Since its launch in 2008, the Fermi Large Area Telescope (LAT) has detected over 200 γ-ray pulsars above 100 MeV. This population of pulsars is characterised by a rich diversity of light curve morphologies. Researchers ... -
Constraining viewing geometries of pulsars with single-peaked γ-ray profiles using a multiwavelength approach
Seyffert, A.S.; Venter, C.; Johnson, T.J.; HArding, A.K. (SAIP, 2011)Since the launch of the Large Area Telescope (LAT) on board the Fermi spacecraft in June 2008, the number of observed γ-ray pulsars has increased dramatically. A large number of these are also observed at radio frequencies. ... -
The effect of an offset-dipole magnetic field on the Vela pulsar’s γ-ray light curves
Breed, M.; Venter, C.; Harding, A.K.; Johnson, T.J. (SAIP, 2015)Over the past six years, the Fermi Large Area Telescope has detected more than 150 γ-ray pulsars, discovering a variety of light curve trends and classes. Such diversity hints at distinct underlying magnetospheric and/or ... -
Hard X-ray quiescent emission in magnetars via resonant Compton upscattering
Baring, M.G.; Wadiasingh, Z.; Gonthier, P.L.; Harding, A.K. (IOP Publishing, 2017)Non-thermal quiescent X-ray emission extending between 10 keV and around 150 keV has been seen in about 10 magnetars by RXTE, INTEGRAL, Suzaku, NuSTAR and Fermi- GBM. For inner magnetospheric models of such hard X-ray ... -
Implementation of a goodness-of-fit test for finding optimal concurrent radio and γ-ray pulsar light curves
Seyffert, A.S.; Venter, C.; Allison, J.; Schutte, W.D.; Harding, A.K. (SAIP, 2015)Since the launch of the Fermi Large Area Telescope in 2008 the number of known γ-ray pulsars has increased immensely to over 200, many of which are also visible in the radio and X-ray bands. Seyffert et al. (2011) ... -
Modeling and maximum likelihood fitting of gamma-ray and radio light curves of millisecond pulsars detected with Fermi
Johnson, T.J.; Venter, C.; Harding, A.K. (Fermi, 2011)Pulsed gamma rays have been detected with the Fermi Large Area Telescope (LAT) from more than 20 millisecond pulsars (:\ISPs), some of which were discovered in radio observations of bright, unassociated LAT sources. We ... -
Modeling of gamma-ray millisecond pulsar light curves revealed by Fermi-LAT
Venter, C.; Harding, A.K.; Guillemot, L. (Thê Giói Publishers, 2009)Fermi Large Area Telescope (LAT) has recently detected 8 gamma-ray millisecond pulsars (MSPs), providing an unprecedented opportunity to probe the magnetospheres of these lowspin-down pulsars. We performed 3D emission ... -
Modeling the pulse profiles of millisecond pulsars in the second LAT catalog of γ-ray pulsars
Johnson, T.J.; Venter, C.; Harding, A.K.; Grove, J.E. (AIP, 2012)Significant γ-ray pulsations have been detected from ∼40 millisecond pulsars (MSPs) using 3 years of sky-survey data from the Fermi LAT and radio timing solutions from across the globe. We have fit the radio and γ-ray pulse ... -
Modelling the polarisation signatures detected from the first white dwarf pulsar AR Sco.
Du Plessis, L.; Wadiasingh, Z.; Venter, C.; Chandra, S.; Harding, A.K. (Sissa Medialab, 2018)Marsh et al. (2016) detected radio and optical pulsations from the binary system AR Scorpii (AR Sco). This system, with an orbital period of 3.55 h, is composed of a cool, low-mass star and a white dwarf with a spin period ... -
Multiwavelength analysis of four millisecond pulsars
Guillemot, L.; Venter, C.; Cognard, I.; Johnson, T.J.; Harding, A.K.; Fermi LAT (AIPC, 2011)Radio timing observations of millisecond pulsars (MSPs) in support of Fermi LAT observations of the gamma-ray sky enhance the sensitivity of high-energy pulsation searches. With contemporaneous ephemerides we have detected ... -
Toward a more rigorous goodness-of-fit test for evaluation simultaneous radio and gamma-ray pulsar light curve fits
Seyffert, A.; Venter, C.; Allison, J.; Schutte, W.; Harding, A.K. (Sissa Medialab, 2015) -
What can we learn from phase alignment of γ-ray and radio pulsar light curves?
Venter, C.; Johnson, T.J.; Harding, A.K. (SAIP, 2011)The Fermi Large Area Telescope (LAT) has revolutionized high-energy (HE) astronomy, and is making enormous contributions particularly to γ-ray pulsar science. As a result of the many new pulsar discoveries, the γ-ray pulsar ...