Now showing items 1-8 of 8

    • A search for pulsations from geminga above 100 gev with veritas 

      Aliu, E.; Archambault, S.; Archer, A.; Aune, T.; Barnacka, A.; Beilicke, M.; Benbow, W.; Bird, R.; Buckley, J. H.; Bugaev, V.; Byrum, K.; Cardenzana, J. V.; Cerruti, M.; Chen, X.; Ciupik, L.; Connolly, M. P.; Cui, W.; Dickinson, H. J.; Dumm, J.; Eisch, J. D.; Errando, M.; Falcone, A.; Feng, Q.; Finley, J. P.; Fleischhack, H.; Fortin, P.; Fortson, L.; Furniss, A.; Gillanders, G. H.; Griffin, S.; Griffiths, S. T.; Grube, J.; Gyuk, G.; Håkansson, N.; Hanna, D.; Holder, J.; Humensky, T. B.; Johnson, C. A.; Kaaret, P.; Kar, P.; Kertzman, M.; Kieda, D.; Krennrich, F.; Kumar, S.; Lang, M. J.; Lyutikov, M.; Madhavan, A. S; Maier, G.; McArthur, S.; McCann, A.; Meagher, K.; Millis, J.; Moriarty, P.; Mukherjee, R.; Nieto, D.; O'Faoláin de Bhróithe, A.; Ong, R. A.; Otte, A. N.; Park, N.; Pohl, M.; Popkow, A.; Prokoph, H.; Pueschel, E.; Quinn, J.; Ragan, K.; Reyes, L. C.; Reynolds, P. T.; Richards, G. T.; Roache, E.; Santander, M.; Sembroski, G. H.; Shahinyan, K.; Smith, A. W.; Staszak, D.; Telezhinsky, I.; Tucci, J. V.; Tyler, J.; Varlotta, A.; Vincent, S.; Wakely, S. P.; Weinstein, A.; Williams, D. A.; Zajczyk, A.; Zitzer, B. (IOP Publishing, 2015-02-09)
      We present the results of 71.6 hr of observations of the Geminga pulsar (PSR J0633+1746) with the VERITAS very-high-energy gamma-ray telescope array. Data taken with VERITAS between 2007 November and 2013 February were ...
    • A search for very high energy gamma rays from the missing link binary pulsar j1023+0038 with veritas 

      Aliu, E.; Archambault, S.; Archer, A.; Benbow, W.; Bird, R.; Biteau, J.; Buchovecky, M.; Buckley, J. H.; Bugaev, V.; Byrum, K.; Cardenzana, J. V; Cerruti, M.; Chen, X.; Ciupik, L.; Connolly, M. P.; Cui, W.; Dickinson, H. J.; Eisch, J. D.; Falcone, A.; Feng, Q.; Finley, J. P.; Fleischhack, H.; Flinders, A.; Fortin, P.; Fortson, L.; Furniss, A.; Gillanders, G. H.; Griffin, S.; Grube, J.; Gyuk, G.; Hütten, M.; Håkansson, N.; Holder, J.; Humensky, T. B.; Johnson, C. A.; Kaaret, P.; Kar, P.; Kelley-Hoskins, N.; Kertzman, M.; Kieda, D.; Krause, M.; Lang, M. J.; Loo, A.; Maier, G.; McArthur, S.; McCann, A.; Meagher, K.; Moriarty, P.; Mukherjee, R.; Nguyen, T.; Nieto, D.; Bhróithe, A. O’Faoláin de; Ong, R. A.; Otte, A. N.; Pandel, D.; Park, N.; Pelassa, V.; Petrashyk, A.; Pohl, M.; Popkow, A.; Pueschel, E.; Quinn, J.; Ragan, K.; Reynolds, P. T.; Richards, G. T.; Roache, E.; Rulten, C.; Santander, M.; Sembroski, G. H.; Shahinyan, K.; Smith, A. W.; Staszak, D.; Telezhinsky, I.; Tucci, J. V.; Tyler, J.; Varlotta, A.; Vincent, S.; Wakely, S. P.; Weiner, O. M.; Weinstein, A.; Wilhelm, A.; Williams, D. A.; Zitzer, B.; Chernyakova, M.; Roberts, M. S. E. (American Astronomical Society, 2016-11-08)
      The binary millisecond radio pulsar PSR J1023+0038 exhibits many characteristics similar to the gamma-ray binary system PSR B1259-63/LS 2883, making it an ideal candidate for the study of high-energy nonthermal emission. ...
    • Circular polarization of synchrotron radiation in high magnetic fields 

      de Búrca, D.; Shearer, A. (Oxford University Press (OUP), 2015-04-01)
      The general model for incoherent synchrotron radiation has long been known, with the first theory being published by Westfold in 1959 and continued by Westfold and Legg in 1968. When this model was first developed, it was ...
    • hst optical polarimetry of the vela pulsar and nebula 

      Moran, P.; Mignani, R. P.; Shearer, A. (Oxford University Press (OUP), 2014-09-30)
      Polarization measurements of pulsars offer a unique insight into the geometry of the emission regions in the neutron star magnetosphere. Therefore, they provide observational constraints on the different models proposed ...
    • Inverse mapping of polarized optical emission from pulsars: basic formulation and determination of emission altitude 

      Mc Donald, J.; O’ Connor, P.; de Burca, D.; Golden, A.; Shearer, A. (Oxford University Press (OUP), 2011-08-22)
      We present an inverse mapping approach to determining the emission height of the optical photons from pulsars, which is directly constrained by empirical data. The model discussed is for the case of the Crab pulsar. Our ...
    • Inverse mapping of pulsar magnetospheres: optical emission comes from 300 km above the surface 

      de Búrca, Diarmaid; O'Connor, Padraig; McDonald, John; Shearer, Andy (Cambridge University Press (CUP), 2011-09-01)
      In order to determine the emission height of the optical photons from pulsars we present an inverse mapping approach, which is directly constrained by empirical data. The model discussed is for the case of the Crab pulsar. ...
    • Investigations of the magnetospheric plasma distribution in the vicinity of a pulsar. i. basic formulation 

      McDonald, John; Shearer, Andrew (IOP Publishing, 2008-12-01)
      The magnetospheric plasma distribution in the vicinity of a pulsar at various inclination angles is investigated using a new relativistic, parallel three-dimensional particle-in-cell (PIC) code DYMPHNA3D. DYMPHNA3D uses a ...
    • Optical polarimetry of the inner crab nebula and pulsar 

      Moran, P.; Shearer, A.; Mignani, R. P.; Slowikowska, A.; De Luca, A.; Gouiffes, C.; Laurent, P. (Oxford University Press (OUP), 2013-06-20)
      Time-resolved polarization measurements of pulsars offer a unique insight into the geometry of their emission regions. Such measurements provide observational constraints on the different models proposed for the pulsar ...