A. S. Seyffert, C Venter, T. J. Johnson, A. K. Harding
Since the launch of the Large Area Telescope (LAT) on board the Fermi
spacecraft in June 2008, the number of observed gamma-ray pulsars has increased
dramatically. A large number of these are also observed at radio frequencies.
Constraints on the viewing geometries of 5 of 6 gamma-ray pulsars exhibiting
single-peaked gamma-ray profiles were derived using high-quality radio
polarization data (Weltevrede, 2010). We obtain independent constraints on the
viewing geometries of 6 by using a geometric emission code to model the Fermi
LAT and radio light curves (LCs). We find fits for the magnetic inclination and
observer angles by searching the solution space by eye. Our results are
generally consistent with those previously obtained (Weltevrede, 2010),
although we do find small differences in some cases. We will indicate how the
gamma-ray and radio pulse shapes as well as their relative phase lags lead to
constraints in the solution space. Values for the flux correction factor
corresponding to the fits are also derived (with errors).
View original:
http://arxiv.org/abs/1201.4272
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