  We study sky maps and light curves of gamma-ray emission from neutron stars
in compact binaries, and in isolation. We briefly review some gamma-ray
emission models, and reproduce sky maps from a standard isolated pulsar in the
Separatrix Layer model. We consider isolated pulsars with several variations of
a dipole magnetic field, including superpositions, and predict their gamma-ray
emission. Our results provide new heuristics on what can and cannot be inferred
about the magnetic field configuration of pulsars from high-energy
observations. We find that typical double-peak light curves can be produced by
pulsars with significant multipole structure beyond a single dipole. For binary
systems, we also present a simple approximation that is useful for rapid
explorations of binary magnetic field structure. Finally, we predict the
gamma-ray emission pattern from a compact black hole-neutron star binary
moments before merger by applying the Separatrix Layer model to data simulated
in full general relativity; we find that face-on observers receive little
emission, equatorial observers see one broad peak, and more generic observers
typically see two peaks.
