Hollow core?
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We carried out the Gaussian fitting to the profile of PSR B1237+25 and found that six components rather than five are necessary to make a good fit. In the central part, we found that the core emission is not filled pencil beam but is a small hollow cone. This implies that the impact angle could be $β<0.5^\circ$. The ``hollow core'' is in agreement with Inverse Compton Scattering model of radio pulsars.
2 pages, no figures, LaTeX
2 pages, no figures, LaTeX