The dependence of observed gamma-ray pulsar spectra on viewing geometry

Abstract

We calculate the gamma-ray lightcurves and spectra of rotation powered pulsars for a wide range of observer's viewing angles, and inclination angles of the magnetic axis to the rotation axis. We show how the shapes of the observed phase-averaged spectra as well as energy-integrated pulse profiles depend on the orientation for classical and millisecond pulsars.

4 pages, 5 Postscript figures, use moriond.sty, latex2e and dvips2e, to apear in the proceedings of the 22nd Moriond Astrophysics Meeting, Les Arcs 2002